12 bolt truck vs car rear end. Truck 12 Bolt Series 2 = 2.

12 bolt truck vs car rear end Wheel Stud Pattern, 30 Inner Axle Splines and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Today! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make the 1970 truck 12 bolt is unique from all the other years truck 12 bolts because it was the only year that was still 6 lug but was the new '71-up width overall. any help would be greatly appreciated. 00" o. com FREE DELIVERY possible on eligible purchases USA Standard Gear (ZK GM12T) Master Overhaul Kit for GM 12-Bolt Truck Differential. 76 - 3. 95. Developed by Chevrolet, the 10 Bolt Rear End is a type of differential that is commonly found in a variety of Chevrolet vehicles, including trucks and cars. 90 Ratio] (2) I know a 3200 pound car that has been running high eight second quarter miles for years with a car 12-bolt so it can take quite a bit of power. Close. Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. 45 foot pounds is correct for these 3/8 bolts. 625 inner pinion bearing, its a clear choice over the smaller 1. I do not know if it come in reverse pattern but if it does its a good one. 5 has a smaller ring gear and smaller differential bearings than the car 12 bolt and the truck 12 bolt has a smaller pinion shaft and inner pinion bearing than the car 12 bolt. A new Moser 12 bolt is cheaper than a new Moser 9 inch Ford. 5 out of 5 stars GM Chevy 8. The rearend was just built, so it is in perfect condition. One friend swears by the 14 bolt for offroad racing applications, and he's on 42's, partly because of how cheap they are, and also because they're super strong rear ends. What are the differences between a 9-inch and a 12-bolt rearend? Differences Between 9-Inch and 12-Bolt Rear Ends. 8620 Street, 3 Series; 8620 Street, 4 Series; View All GM 12 Bolt Truck Gears; Mopar 8-3/4" Gears . Eaton Posi For GM 8. I have an 8. Read more. There are a lot of after market performance parts available for the truck 12 bolt. This Strange GM 12-bolt rear end is available with your choice of housing ends and custom widths. 6" 10 Bolt. They are two different rear ends, and the car is better in nearly every way. It has nothing to do with the housing other than fitting a truck 12 bolt. REWARDS. One of the most popular high performance rear ends in use today is the 12-bolt Chevy. The car 90 foot pounds of torque on the ring gear bolts is 2 times too much. 10 rear axle gear ratio, our torque jumps to 10,168 ft. This is the very first car/truck Internet forum I joined. I just bought a 12-bolt posi rearend from a guy. If the car hooks up, that is a phenomenal amount of twisting motion applied! (Illustration/Summit Racing) Q: I have a 1970 El Camino with a 12-bolt differential and 4. The lowest gear ratio available for a 3 series carrier is a 3. Rear, 33-Spline [3. Replace that old worn out original with a new one. 89 $ 6. I was looking for a wagoneer dana 44, but ran across a chevy 12 bolt that is the same width and has 4. 73 Complete 12 Bolt Built to Order Rear End Packages. Additionally, you can use the gasket size and shape to identify all Chevy truck rear-ends compared with an identification table. This durable Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. 59 / 1/4 10. I picked up "pumpkin" at a bone yard & cleaned it out completely, looks good. If you could use the 9. Each series of carrier is compatible with only a certain range of gear ratios. It is also cheaper to build if you go with a completely new rear end. Eaton Detroit Truetrac Differentials. But, requires minimal amount of power to turn. Will be between 750 to 1000 horsepower. I have most ratios between 3. 5 rear end and it has semi floating axles like the 12 bolt. *ALL MOSER 12-BOLT REAR ENDS ARE "CAR" TYPE REARS! THIS INCLUDES ALL TRUCK APPLICATIONS, AFTERMARKET SUSPENSION COMPONENTS THAT UTILIZE THE REAR COVER OF THE OEM 12-BOLT View All GM 10 Bolt Gears; GM 12 Bolt Car Gears . Choosing the right rear end for your vehicle can significantly impact performance and durability. 99. This 1955 Chevrolet 3100 Step Side Pickup Truck was built by the Hot Rod Factory, Minnesota’s premier hot rod shop and muscle car restoration facility. Most of them got the 1310 yoke and I have not been able to figure out why some of them got the larger U joints. just did this but mine wasnt this easy. Need parts and pieces? You Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Nodular Iron, Rear, GM 8. I want to change to the 5 lug rear axles, change the gear ratio, add a posi rear end, & possibly rear disc brakes. GM A-Body Complete 9" Rear End Packages; GM B-Body Complete 9" Rear End Packages; GM F-Body Complete 9" Rear End Packages; GM G-body 78-87 Complete 9" Rear End Package; GM Chevy S10 82-04 Complete 9" Rear End Package; GM Tri 5 55-57 Chevy Complete 9" Rear End Package; GM Truck Complete Rear End Packages; GM X-Body Nova Complete Rear End Mini spool for GM 12 bolt car & truck with 30 spline axles YP MINSGM12-30 the axle can be pushed into the housing far enough for the C-clip to be installed into a groove on the end of the axle splines. SAE 75W-90 automotive gear lubricant designed to meet the highest level of performance 3. They compared a Ford, chevy 12 bolt and a Mopar rear (Dana I think). :no::no::no: Oh well the car style 12 bolt is much better than the truck - so I have read. " Join Date: Sep 2007. 73 gears still on the carrier sitting in the shop, if I find time this weekend I may part out one of the 12-bolts with the higher ratio gears and make note of the differences. This means two different pinion seals. I’ve found a few 12 bolt rear ends out of mid to late 1970s chevy truck. Estimated Ship Date: Feb 10, 2025 if ordered today. Not Yet Reviewed. 42 / 3. The other difference between car and truck rims of that vintage is that the bolt pattern will be 4. 919-672-2705 566 Airport Rd, Louisburg, NC * Fits 1970-1981 GM TRUCK 12 BOLT 2WD * Right and left hand side * 30 spline * 31 7/16" long * 5 lug * 1541H Stronger than stock! Item #: AX:G14071751 GM 12 Bolt Car; GM 12 Bolt Truck; GM 14 Bolt & GM 11. I have two Eaton posi 12 bolt rear ends. This video takes a deep look inside Mark Williams brute strength street-strip 12 bolt rear end assembly. Meets or exceeds all Ignoring all the numbers and measurements, the picture of the rear cover tells me it is a truck rear. The '63 and '64 12 bolts had 17 spline axels and corresponding spider gears. I've seen I'm setting up 1972 Chevy passenger 12 bolt rear-end, (8. You can build the truck 12 bolt to work in Camaros, Novas and Impalas, but not Chevelles. , 1/4" wall), custom alloy axles (30, 33, or 35 spline), bearings, studs, seals, heavy duty retainer plates, new housing ends, t-bolt kit, differential, pinion yoke, ring & pinion, rear cover, set up with Timken GM made two different versions of the 12-bolt rear end: one for trucks and one for cars. Super Stockers use this rearend due to this feature. If you need to convert the rear end to 6 lug you can find axles in the wrecking yard. One is a 1967 with well over 300k on it and the clutches are still within specs. 012-inch for a drag race 12-bolt rear axle. 5 inch 10 Bolt • Rear CHEVY GM 12 BOLT TRUCK Pinion preload torque with new bearings, 13 TO 15 inch / pounds Pinion to ring gear back lash . This rear end should bolt in directly •AXLE DIFF - 4X4 FRONT DIFF PARTS • AXLE DIFF - REAR END PARTS • Rear 1955 to 1964 CHEVY Drop Out • Rear AMC Model 20 • Rear CHEVY 12 Bolt CAR • Rear CHEVY 12 Bolt TRUCK • Rear CHEVY/GM 10. S. It does not have c clips, the axles bolt in. 0 out of 5 stars ( 1 ) The GM 12-bolt rear axle assembly receives its name due to having 12 bolts on the rear cover of the housing. Didn't most trucks come with a 12 bolt? A truck 12 bolt, not a car 12 bolt. 5" 10 bolt rear end identification vs 8. There is, however, a 14 bolt rear end in later model 3/4 ton pickups. My k20 with a 12 bolt rear and when i rebuilt the rearend I put an Auburn locker with an LS and 4L60 on 33" tires but it is not on the road yet. The truck 12 bolt has a smaller pinion shaft and uses a smaller inner pinion bearing. GM 12 Bolt Truck (GM 12T) - 12 bolt cover with 8. 0 out of 5 Rear disc brakes will need vehicle changes disc disc master [check valves are removed ] With the cost and hassle of me finding a competent person/shop to rebuild my 12 bolt, I ended up selling it for $1200 and that paid for most of my new QP 9 inch. The truck 12 bolt uses a smaller pinion shaft and inner bearing, but I don't see this as a big weakness. The 12 bolt truck uses the smaller 10 bolt pinion which is weak. 10 gear. There is no 8 bolt ring gear in a GM car or truck. 875 in. $3,165. Other videos on Old & Busted:68 C10 Turbo RestoMod Build - http Re: 8. using Moser Engineering owned Casting Boxes. For the passenger car 12-bolt, the pinion shaft measures 1. But it too (like the Ford and the Dana) has shortcomings. 012" of backlash for an 8. From '65 and up, the axles were 30 spline. 9") 12 Bolt axle is available in passenger car (GM 12P) and truck (GM 12T) rear axle configurations and features an 8. It cost me less the $500 for all. Can it be converted to a posi? Truck 12 bolt would use the "T" compatible diff (read not the same as a passenger car GM 12 bolt) The weakness is the rear axle. GM 12 Bolt Car (GM 12P) GM 12 Bolt Truck (GM 12T) GM 9. Package 12 bolts were still being depleted until 1981. On todays episode of Explained, we go over the main differences between a Ford 9-Inch and a GM 12-Bolt rearend and which application may suit you. idiot, idiot, idiot. 5 inch 14 Bolt • Rear CHEVY/GM 7. GM put these rear ends in all kinds of different cars and trucks for a very long time. 00 in. Call 800. I still used a dial-up modem back then! 01-24-2016, 05:16 PM A different 12-bolt differential was used for light truck applications, but those 12-bolt units are not directly interchangeable. Estimated Ship Date: Today. See more details. If it is a 6 lug then you are OK. all other parts are new. 25, and twelve bolts on the GM 12-bolt rear end. AMC 20 CHRYSLER 8-1/4” , 8-3/8” GM 8-7/8” 12 BOLT CAR GM 8-7/8” 12 BOLT TRUCK GM 9-1/2” I read a comparison in Car Craft (I think) a while back and they said the 12 bolt was lighter than the ford and stronger. If you need a completely assembled 12 Bolt rear powdercoated in a crate, we have you covered. I've taken it out, broken it down, etc. Most folks say to leave it 1/16"-1/8" out of the housing. Ring gear size is different, axles are different, and covers are different. In Stock. With the proper components and modifications, the 12 bolt •AXLE DIFF - 4X4 FRONT DIFF PARTS • AXLE DIFF - REAR END PARTS • Rear 1955 to 1964 CHEVY Drop Out • Rear AMC Model 20 • Rear CHEVY 12 Bolt CAR • Rear CHEVY 12 Bolt TRUCK • Rear CHEVY/GM 10. I do believe the truck rears have a good selection of parts available, The 12-Bolt truck rear is weaker than the 12-Bolt car. Jul 27, 2024. 5 to a 35 spline 12 bolt car as being nearly the same strength when built the same. 73 - down (smaller numerically) Series 3 = 2. Identifying a true Chevrolet 12-bolt rear end. 11:1 is available for 3- The 12-bolt integral design features a carrier case and pinion support that are part of the rearend housing, while the 9-inch employs a drop-out third member that takes advantage of an independent The GM 8. 42. of torque transmitted to the rear end. 438", Car pinion Dia. of torque to each rear tire. 2" It has to do with the diameter of the ring gear. On the up side the wheel bearings are huge compared to a car wheel bearing (to carry a heavier load). 875" GM 12 Bolt Truck, 3. I would like to do a disc brake conversion on it but not sure which parts to get. Select your options. 08-3. Menu. 875 inches. 875-inch (referring to its ring gear diameter), Chevrolet's 12-bolt rear end is one of the most celebrated in the American hot-rodding scene. Part Number: SCE-284. 438 inches, and by the size of the rear cover, which measures 10. The bolts will break or strip the threads. Moser Engineering 7110 Aluminum Rear Differential Cover for 12 Bolt GM Rear End. $8. This guide can be used to help identify your rear axle make/model. Personal menu. 99. The advantage of the Ford passenger car rear end over the F My 69 C-10 has a single-track 12-bolt rear. Either one of these rear ends would be a 10 bolt vs 12 bolt rear end? Web 67-72chevytrucks. Lighter and more efficient than its Ford 9-inch and Dana 60 rivals, the 12-bolt enjoys as much use amongst brand-loyal off-roaders as it does GM 12 Bolt Car / Forged Pinion Yoke / 1350-Fits GM 12 Bolt Passenger Car 30 spline pinion Forged steel material stronger than billetComes with 1350 Se. Oct 29, 2020 #11 and in these 12 bolt truck axles you would rather have open diff than the G80 gov lok, AKA grenade-lok Auto Accessories Garage; Replies 4 Views 1K. A 12 bolt truck is nothing like a 12 bolt passenger car, the car has a larger pinion gear. 5 10 Bolt Shafts; Advantage to the Dana 60, it has a 9-3/4" ring gear and uses 31 spline axles which are 10% stronger than the 30 spline axle of the 12 bolt (and a 35 spline axle is available for spools which is 56% stronger than the 30 spline rear). $13. Truck currently has a 10 bolt. Those c clips were axle retaining clips for the 12 bolt rear ends and usually if those snap or disappear your axle falls out of the vehicle. The 12 bolt Car rear end is the winner here. If you are wanting 3. 55 12 bolt Auburn posi DAILY DRIVER BEST: 60' 1. The majority of Chrysler people switched to 12-bolt axles from Dana when NHRA changed the rule from OE manf to 'an automotive type' rear axle. The 12 bolt truck rear end has a cover that is sort of shaped like a diamond on it's side. The 12 bolt can be A whole posi unit may need to be purchased or maybe you could source the rest elsewhere. Two Just wondering is there any difference between a 69' Camero 12 Bolt and a 70's Chevy truck 12 Bolt 5 Lug rear end besides the spring perch location? The truck 12 bolt rear has a smaller ring gear diameter and housing therefore making it weaker than a car 12 bolt rear. It includes huge 35-spline axles, a matching (Huge) 35-spline Detroit Locker, a custom cast iron case with critical reinforcements built in, unique housings ends and bearings, chrome moly axle tubes, a billet pinion yoke for a massive 1350 Wondering which is a stronger rearend. 8 rear end, and the last time I did a ring & pinion, I set the Ford gears to . 5 Depending on how hard of auto-crossing you intend to do you could step up to a full floating rear end. ABOUT US MEET THE TEAM OUR VEHICLES. TIMKEN 8460N Pinion Seal fits Chevy 12 Bolt CAR & TRUCK rear ends Part#: 8460N. Comes with (2) Straps and (4) Bolts. The truck 12 bolt uses larger axle bearings and brakes. Filters. 89. My truck is a 1986 C10 stepside. I don't know why so many people are scared of the smaller inner pinion bearing in the truck 12 bolt. All Moser 12 Bolt Housings are designed and manufactured in the U. of twisting motion. 625". 010-inch and 0. 2", 8. I have a 12-bolt, with C-clip elim, no leaks here. 250" wall seamless steel axle tubes The Chevy 10 Bolt Rear End has a rich history and holds significant importance in the automotive industry. No matter if I run a truck 12, or a truck 10, it'll eventually need aftermarket shafts, and aftermarket traction device, and no doubt some sturdy Richmond gears that'll take the abuse. x 0. 012" of backlash, and it was just fine. 875 inches by 10. The 12-bolt rear end reduces the load on the pinion by positioning the pinion Find Axle Shafts, Direct Fit GM 8. AXLE SHAFTS - Rear Axle Shafts - GM 12 Bolt Truck. (12-bolt), truck Differential Case Design Type, 5 x 5. With it's larger 1. The 12-bolt rear end was introduced in the early 1960s and was used from 1964 to 1972 in GM cars. Timken 8460N Pinion Seal fits Chevy 12 Bolt rear end for PASSENGER CAR and TRUCK Rear Ends Big Dave . 5 inch 10 Bolt • Rear CHEVY My pinion seal was leaking and after doing some homework on the subject, I learned the 12 bolt car seal was no longer made, only the truck seal. The pinion is the same diameter as the 12 bolt, but the 1972 rear end will have the weaker 28 spline factory axels unless that is an aftermarket Eaton posi in the rear end you bought that uses the 30 spline rear axels that were also used in the 12 bolt. 76" 12 Bolt (2014+) GM 14 Bolt 9. 875" 12-Bolt CAR TA Performance Aluminum Rearend Girdle Cover TA-1810 12 Bolt Rear End with Posi What Oil to use? The 1967 - 1972 Chevrolet & GMC Pickups Message Board mobil 1 and others make economical gear lube that is good for an average joe car, but i will be using royal purple gear 80w-90 in my 72 burb 3/4 ton with HO52 axle when i change to a 4. Helpful. 875 Inch 12 The 8. Our Catalog. NEW GM 8. I believe he has a Dana 60 in the front on that rig. Like most quality time under your If the current rearend is a 12 bolt I would just add a posi-carrier like a Eaton or auburnor Detroit locker I put a stock Eaton locker in my 70 C10 truck and it has a LS with a 6L80E trans. 875" Chevy 12 Bolt Car Rearend (will Not fit Truck) (will Not fit Oldsmobile) Cover Bolts: 12 Ring Gear Bolts: 12 Axle Splines: 30 Pinion Splines: 30 Package Includes the Following: 1- Chevy 12 Bolt Car 3. This is the car 12 bolt. Key Specs. Restoration fanatics will appreciate how exact this unit resembles the original OEM Pinion yoke. Free Shipping This is a weak rear-axle assembly compared to the 12-bolt’s much larger 8. He said that the rearend came out of a '70 chevelle. 5 10 bolt is stronger in more ways too then the truck 12 bolt. This makes it easy to swap gears, which is an important plus for dual-purpose street/strip cars. 875" ring & pinion). All Moser 12 Bolt Housings are designed and manufactured in the U. If I am not mistaken the 8. 42 Ratio Rear Ring & Pinion GearInstall Kit Axle Bearings & Seals. You can easily differentiate between GM car 12-bolt rear ends and GM truck 12-bolt rear ends with their cover shape. The pinion shaft and as such the bearing diameter is smaller on a truck 12 bolt rear than that used in a car. 00. But i would compare a 35 spline 8. Moser 12-bolt (built to order) 3. The bolt pattern for the brake backing plates is different. ff4055. Part Number: YGA-26052. The truck and car 12 bolt share a lot of the same parts. You must be registered for see images attach Reactions: bucket. The only Car 12bolts have a larger pinion gear shaft vs truck 12bolts making them stronger. 625" Inside Diameter. 73 & Up ; 30 Spline Pinion; Premium Quality Gear; Manufactured with 8620 Heat-Treated Material Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Differential & Rear-End Components; Differential Carriers; EATON 913A315; Part Number: ETN-913A315. _____ GM 12 Bolt Truck / Posi / Gears / Bearing Kit / Package-GM 12 Bolt Truck Clutch Style Posi UnitGM 12 Bolt Truck Ring & Pinion Gear SetGM 12 Bolt T GM Truck Complete Rear End Packages; GM X-Body Nova Complete Rear End Packages GM 8. Muscle Cars Aftermarket 12-bolt rear axle Hosted by The GM 12-bolt carrier is accessed by removing the rear differential cover because the rear end housing is the carrier case, whereas with the 9-inch Ford, the carrier case drops completely out of the front of the rear end housing. 6 inch 10 Bolt • Rear CHEVY/GM 8. Maksimovich. In comparison, you are neither gaining or losing in the switch if you are putting HUGE mudders on The car 12 bolt and truck 12 bolt are completely different units. One person found this helpful. Register; Log in; Shopping cart (0) You have no items in your shopping cart. that will take a beating! The standard set up includes: 12 bolt rear end housing with all stock style suspension mounts installed; 3. I had the gears changed from 3:31's to 3:73's. Many 1/2 ton GM trucks got the upgraded 12 bolt axle. R. Fits GM 12 bolt truck rear end; Carrier breaks are: 2. May be easier to find a 9" ford the correct width. 99 $ 8. The car 12 bolt uses a 8. I have installed a car ring and ponion in a truck diff by using a different pinion bearing, very expensive as it is a wheel bearing for commercial aircraft, machining the carrier to fit the housing, and a ring gear spacer to get the spacing right. 0:56 . The car units have a handlebar mustache grove/channel which carries oil from the reing gear and flows it over the the carrier bearings. 3 Series Car; 4 Series Car; View All 8620 Street Gears; View All GM 12 Bolt Car Gears; GM 12 Bolt Truck Gears . A Gm 5 lug bolt pattern on a 2wd truck is a 5 on 5 pattern were Broncos were 5 on 4. I also don't know why GM made 2 different 12 bolt rear ends with the only real difference being the smaller pinion bearing. The truck units to not, nor does the cover in the photo. Yukon Gear & Axle (YCGGM12T) Cover Gasket for GM 12-Bolt Truck Differential 135. Currie Enterprises is a premier manufacturer of high-performance direct replacement, and custom muscle car, and truck rearend axle assemblies. Which is stronger, the 12 bolt or the 44? I'd assume the 12 bolt. The 12 bolts were 62" WMS to WMS from '63 thru mid year 1970 when they increased to 63. The axle is Dodge 12 Bolt Rear End Identification. Replacement Rear Axle Bearing for GM 12-Bolt Rearend, Each made by Speedway Motors, for as low as $19. 875" 12-Bolt Rear Chevy Car 1964-72 with 30 Spline Axles, 2. I would suggest a truck 12-bolt. Should be marks on the housing, I'd rather just turn and count. 71 C/50 Grain Truck, 350 This is likely a 1330 yoke. The rear end was in my driveway less than two weeks later. 591 / MPH 129. Why didn't they just make all of the 12 bolt rear ends the same as the car 12 bolt? The motor in the truck was a 305 out of a 76 Camaro but the rear end is def a truck 12b. Even the internal parts between the car and truck Eaton posi will interchange. We're taking the mystery out of a 12-bolt build up! We'll fill an old swap meet 12-bolt rear end with new parts including a ring and pinion set and posi unit As you can see, the Chevy 12-bolt differential is one stout axle, and it was the rear axle of choice for GM muscle cars and many GM competition cars. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central; Ring and Pinion Gears,Yukon Gear & Axle 8. 008"- . We will build it the way you want it in just 2 business days! 1988-98 GM 1500 Silverado/Sierra Pick-Up Truck (6 X 5 1/2″ Bolt Yukon Gear & Axle (YSPPN-016) Pinion Nut For GM 12 Bolt Car & Truck, 55-62 Car & Truck, 8. Housing, with OEM located mounting provisions, seamless steel tubing (3" O. The differentials are the same size with the difference being in the location of the ring gear flange. 5 inch 14 The Ford 8. not internet lore regarding confusion on the differences on a truck 12 bolt vs a car [ December 12, 2024 ] The Key to Making Your Car Fast: The Torque Converter Technical Info [ December 4, How To Swap A GM 12-Bolt Rear-End To Positraction. Talk to the experts. If those backlash numbers seem a bit large, there’s method to the advice: (1): As the rear end reaches operating temperature, the dimensions: close. There is also a difference in pinion length on some 12 bolts, with the preferred car 12 bolt being shorter than the odd ball 70s stuff. 5; GM 7. 0 out of 5 stars. 5 inch 14 Bolt • Rear CHEVY/GM 11. Truck 12 Bolt Series 2 = 2. If you are going to spend this kind of money then do a 12 Ring and Pinion Gears,Yukon Gear & Axle 8. Many consider the 12-bolt rear end to be the best when it comes to high-performing rear axle assembly. 8 inch Differential applications in stock as well as a large selection of Ford 8. Uses 30 spline c-clip axles. ff4055 - moser full floater kit assembly for 5 x 5 1/2" bolt pattern. D. Ships from and sold by Lasertech LLC. 875" 12-Bolt Rearend Posi Unit - 30 Spline: Differential Assembly Kits - Amazon. Truck pinion Dia. 5 14 bolt is a huge, heavy chunk of iron, so I wouldn't try using it. Application GM 12 bolt rear end Using 1350 series u-joint Note Fits cars & trucks Features Heavy Duty Nodular Iron Casting - Superior in strength compared to cast iron - Additional material in critical areas - Designed & machined by Strange Engineering - Cast in USA Accepts 1350 Series U-Joint - Larger u-joint than ever offered by OEM - U-joint •AXLE DIFF - 4X4 FRONT DIFF PARTS • AXLE DIFF - REAR END PARTS • Rear 1955 to 1964 CHEVY Drop Out • Rear AMC Model 20 • Rear CHEVY 12 Bolt CAR • Rear CHEVY 12 Bolt TRUCK • Rear CHEVY/GM 10. GM truck front axles and Jeep stuff came with a 6 on 5. 73's or lower, you will need a 4 series carrier. The difference in them is the 10 bolt has a bigger stronger pinion gear, the 12 bolt has a larger ring gear. 75 ring gear which is very The car 12 bolt and truck 12 bolt are completely different units. 66 & 67 12-bolts are inch narrower than 68-72 (which are all the same). Unfortunately, the car version of the seal has been discontinued, and the truck version is the Redbird Speed can offer 12 Bolt complete rear ends, housings, axles, differential parts, brake kits and more. Also this axle has been narrowed quite to fit the car that is using a full tub set-up To determine the type of rear end in your Chevy truck, you can consider the number of bolts. Search. 438 truck rear. You can identify a truck differential by the smaller, 1. Fits all Chevy 30 spline 12 Bolt rear differentials. 76 to 3. $696. It will handle extreme performance better. A 10 bolt will A Ford 9" is about 3 inches wider and a 12 bolt Chevy truck one looks about the same as the Ford on the width. I'll do most any mechanical work myself, but setting up rear end gears I leave to someone with the right tools and some experience. MFG. G80 locker Asked by: Helpme Posi Traction Differential for GM Car 12-Bolt 8. Big-block Chevelles, Camaros, and other GM high-performance vehicles were fitted with the 12-bolt limited-slip axle to maximize torque transfer and traction. 56's and a spool already. As to why you are breaking 12 bolts? The temper on the gear is probably too hard for the shock of the trans brake. 42 Gear Ratio Vehicle Make: Chevy/GM spec|Axle Splines: 30 Spline spec|Traction Type: Eaton Posi spec|Differential: GM 8. 12 Bolt Diff – 12 Bolt Diff Strange Engineering offers a wide variety im building a street/strip truck. the bolt that holds the pin in center was sheered off. (12-bolt), truck Differential Case Design Type and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: GETREADY I have 12-bolt truck axles, and have a set of 3. 42 gears behind my mild built 383. In addition the axel bearings are larger so it used different axels than a car as well having 5 wheel studs on a 5 inch bolt circle using 1/2" instead of the car sized 7/16 inch stud. 8 inch Gears. 5 rear end has 33 spline axles and it's not much heavier than the 12 bolt. The truck 12 bolt first was available in the '63 model year, and had pressed on backing plates for that year only. OWNER and Administrator; Administrator; Senior Truck / SUV Jeep® Gifts, Clothing, & More Restoration Stock Replacement GM 8. 5". Spicer (RD51996) Speedway Motors 12 Bolt GM Rear End Differential Cover Gasket, Pressed Composite Ensures Leak-Free Seal, Re-usable Gasket for Long Lasting Use, Fits GM Cover GM 12 bolt passenger car cover gasket According to Mark Williams, the ideal gear backlash dimension is between 0. 42:1. For example, there are ten bolts on the GM 10-bolt and 8. I just did this to my '69 truck 12 bolt. Newbie; Posts: 11; I believe that was the car 12 bolt. 12 bolt truck rear end The differences are mainly with the pinion bearing size and the ratio/offset breakdowns (different carriers with certain ratios). 12-Bolt Passenger Car, AccuSeal Pro, Steel Core Laminate, Each. Package includes; New Moser 12-Bolt Made in the U. 2 10 bolt is great little rear end, I have a 1970 Chevy Nova that runs 11’s through the quarter with a 1:56 60′ time. I’m not sure if it’s the original gear ratio, but I want to change to 3. I have also read that because of that you don't want to install the "truck" seal all the way into the car housing because it will leak. i had to beatthe pin out2 inches cut it off, beat it out cut it off, you get Select vehicle to see if its fits to your fitment. and for a '64-69 rear you can take the stock '73-up(BIG 10 package with HD chassis equipment)2 3/4" wide style brakes (with the backing plates and shafts and all)and put it all on the Fits GM truck 12-bolt ring gear differentials with 30-spline rear axles; Will this fit my 2002 Chevy Silverado 1500 rear end? GT4 3. explaining the difference between a true Chevrolet 12-bolt and a bop 12 bolt don't get screwed I also talke I have seen on here many times that the pinion seal for the 12 bolt car rear end isn't available anymore and all that's out there is the truck 12 bolt seal. Eaton makes a good Posi for the 9. 1 1/8" Socket, 7/8" X 16 Thread. It appears they are different size's, so if you drive the truck seal all the way in, you go beyond the sealing area in the pinion yoke and will leak. Buy GM Chevy 8. Part Number: YGA-10626. The truck is a street cruiser with an occasional trip down the 1/4 mile track. I don't set the backlash The 2, 3 or 4 series, refers to the carrier. 9310 Pro Gears; 8620 Street Gears . Part # 92612761: Brand: Speedway Motors: See more specs. Differential, Eaton Detroit Truetrac, 30-Spline, GM, 12-Bolt Truck, Each See More Specifications. if it's non posi, jack up one wheel, turn it exactly twice and count driveshaft revs. 11:1 ring and pinion. The Strange 12 bolt casting is much stronger than the OEM 12 bolt, while still accepting the same components. $6. GM 8. Logged Captkaos. 5 bolt circle. The 10. The truck 12 bolt rear has a smaller ring gear diameter and housing therefore making it weaker than a car 12 bolt rear. 5-7. Then new Moser axles, Moser diff cover, True Trac diff and a 3150 pinion yoke. 5x5 but I'm doing the 5- 4 3/4 car thing for I have wheels for that and running that pattern on two of my chevy cars. The other specs are not too far out. Eaton Detroit Truetrac Had a guy go through the rear end for my 70 Chevelle. 5. I run a stock open differential with a Richmond mini spool, Richmond 4:11 gears, and Moser street axles. 73 gears (US Gear) Wavetrac differential (lifetime warranty) 35 spline bolt in axles with 1/2-20 x 3" screw in studs, GM 5x4. Add to cart-Remove. No Dana 44 axle you will want to bolt in, came with a 5 on 5 pattern. I'm not sure about the 12 bolt truck comment, i've only used 12 bolt car rears. 0122, 7am-10pm CST, everyday. 76-3. My Account: 0 item(s) View Cart: Home: My Account: Tech Info: Links: Pics: GM Truck Complete Rear End Packages; GM X-Body Nova Complete Rear End Packages-----Posi, Gears & Bearing Kit *all moser 12-bolt rear ends are "car" type rears! this includes all truck applications, aftermarket suspension components that utilize the rear cover of the oem 12-bolt truck rear are not applicable! add to cart. It's hard to believe but the truck 12 bolt has a smaller diameter pinion which makes it the weaker unit of the two. / lb. Unlike Not a lot of parts interchange between the truck and car rear end. You can swap a car and a truck differential, but it takes a lot of work to get the backlash set correctly. 875" 12-Bolt CAR Rearend Posi, Gear, Bearing Kit Package - 3. 8 out •AXLE DIFF - 4X4 FRONT DIFF PARTS • AXLE DIFF - REAR END PARTS • Rear 1955 to 1964 CHEVY Drop Out • Rear AMC Model 20 • Rear CHEVY 12 Bolt CAR • Rear CHEVY 12 Bolt TRUCK • Rear CHEVY/GM 10. Thi 1948 - 1956 F1, F100 & Larger F-Series Trucks - 57 F-100 9 inch Rear End vs 57 car rear end - I have read that the preferred (from a great tech article I read on this site) rear end for my 1950 F1 is a 57-72 F-100 9 inch. Products. I see this ratio is only available for a 3-series carrier, but 4. Let me know what this number is and I can tell you if it's a truck or car. The car 12 bolt has a cover that is mosly round. Order one today and bolt in a bullet-proof 12 bolt rear end for your 1965-1970 GM B-Body Impala, Caprice, etc. The other is a 1971 that saw many years of drag racing with slicks and it has started going peg Known alternatively as the GM 8. Ford 9-Inch vs GM 12-Bolt. Its a 12 bolt posi. 625˝ in diameter and the rear cover measures 10-15/16 Unlike the 12-bolt, the 9-inch rear has a removable third- member. The axle splines are the same and all other bearings are the same. GM used the 1330 yoke on a few 12 bolt rear ends from the factory. 5 14 bolt rear end then it would be a better choice. 006" TO . 5 rear end, It is known as the "O" axle and was used in the Olds Cutlass from around '68 to the early '70s. It is also possible to recognize a truck differential by its smaller pinion shaft, which has a diameter of 1. 875" (often rounded to 8. This information should help you locate the Auburn Gear differential model appropriate for your vehicle. 438-inch diameter pinion shaft and the size of the rear cover, measuring 10. Also, what's the difference in ground clearance between the bottom of the diff on the 12 bolt and the dana 44? Axle Housing Cover Gasket; 12 Bolt Holes; Fel-Pro gaskets offer 100 percent vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust. They don't carry the same price tag as car 12 bolts because they are perceived as weaker which they are a tiny bit, but only because of the pinion bearing being more similar to a 10-bolt View All GM 12 Bolt Car Gears; GM 12 Bolt Truck Gears . 12 BOLT MUSCLE PAK Complete 12 Bolt MUSCLEPAKTHE STRONGER REAR-END REPLACEMENT!All Moser 12 Bolt Housings are designed and manufactured in the U. I have a Richmond 456 ring & pinion, Moroso Posi, Strange axles that are C-clip eliminator type, Timken bearings. 875" ring gear and 30 spline semi floating axle shafts. It has a 12 bolt cover and 10 bolts in the ring gear. Truck and passenger car covers are different. -lbs. X2 on the olds rear end. 08 Ratio Rear Ring & Pinion GearInstall Kit Axle Bearings & Seals Part Number: YGA-10625 5. 08 and 4. If it has the Eaton Posi then there will be a casting number on the right side next to the bearing. I still used a dial-up modem back then! 11-20-2016, 02:08 PM #9: GASoline71 "I ain't nobody, dork. 5 out of 5 stars More results. Divide that by two axles and each axle is transmitting over 5,000 ft. 5" 5 lug for car and Find Differential Covers GM 8. 75 bolt pattern (10 year axle warranty) GM "big housing ends" (Impala and truckaccepts my stock backing plate and drum brakes) I'm running a 12 bolt rear end with 3. GM 12-Bolt Truck Rear Axle – Exploded View Diagram. 875 Inch 12-Bolt Car, 1. 875-inch ring gear diameter, so it is unlikely that Chevrolet would put the 10-bolt behind even the base 350-horsepower 396 (402). Make sure t 12 Bolt Truck Differential parts are in stock and ready to ship today at West Coast Differentials. If the sizes of both rear ends are close to the same just mount the entire new rear axle, I'm doing this with a rear axle off a 94 caprice classic for the highway gears and it's not much work to get it to mount in, I will have to figure out the upper control arms from the car on the truck or weld a bracket for the torsion bar. Free ShippingLoading Estimated Ship (12-bolt), truck Differential Case Design Type and get Free Shipping on Orders Over $109 at I have a 12 bolt Chevy truck rear end that is the factory installed rear end on my 63. Call our Rear-End Parts experts for LIVE help. Special Order Got a quick question for you guys about the width of a 12-bolt rearend. The only real difference in strength between the truck and car rear ends is the size of the inner pinion bearings and pinion shaft. But from that angle it is slightly hard to tell if there even was a posi unit in there. 979. It has a locker, rear braces, and adjustable lower control arm brackets. The track can be cut down, but the pinion can not be changed. 1973-81 Rear Differential - GM 12 Bolt with 8-7/8" Ring Gear and 30 Spline Pinion Kit components may vary from illustration depending on your truck's model. 10 in the 10-bolt, 12-bolt, and a few 14-bolt GM truck axles. 010" Ring gear retaining bolt torque 55 ft. Thanks to all for responding. Can be upgraded for C-clip elim. For example, the area behind By integrating expertly welded F-Body mounts for the chassis and torque arm, the Strange 12-bolt rear end provides a heavy-duty alternative to the weaker 10-bolt units found in most F-Body cars and light-duty trucks. 875Cover Bolts: 12Ring Gear Bolts GM Truck Complete Rear End Packages; GM X-Body Nova Complete Rear End Packages-----Posi, Gears & Bearing Kit Packages GM 12 Bolt Car or Truck / Open Carrier Spider Gear Kit / 30 Spline: 0 The 8. It's always a good day when you can upgrade from a "good" to a "legit" 12 Bolt Chevy rear end. A. GIFT CARDS. 4. is 1. fit rear end great. 5"/9. d. 55 Ring and Pinion Set (Richmond Excel Gear) 1- Chevy 12 Bolt Car Yukon Duragrip Posi LSD (30 Spline) However, some clever GM Engineer also designed the cover bolt pattern to contain the same number of boltsa 10 bolt ring gear has a 10 bolt cover, etc. 5 Shafts; GM 8. Find your vehicle. 12 bolt axle setup illustrating the use of the period Kent Moore Tools. I think I had $5-600 in parts and paid him $2-300. Application: 1965-1972 GM 8. Report. 70 And FWIW, I know Ford gears are probably different, but the Ford spec is . 2" Buick/Olds/Pontiac & 63-79 Corvette. The truck unit is not the best differential to spend your money What is the difference between a car and truck 12 bolt chevy rearend? I have a 12 bolt truck rearend that was free. 5 inch 10 Bolt • Rear CHEVY I definitely agree on the Dana 60's and 14 bolts, my buddies all run them in their 4x4's. With a 4. Do not forget about beefing up the driveshaft with a loop. The ring gear flange is offset different on the differential case too, so the differentials don't interchange without some modifications. 9310 Pro, 742 Case; 8620 Street, 742 Case; In sheer numbers alone, the Chevrolet 12 bolt rear end is the most popular in racing. (12-bolt) Truck, Chevy, GMC, Each. With the truck 12-bolt the smaller pinion diameter will be your limiting point but not too limiting. Ring Gear Diameter: 8. It shows heavy-duty rear on the tag on the glove box door. 42 Series 4 = 3. I would bet it can take 3/4 of what a car 12-bolt can due to it. The 9. 8620 Street, 3 Series; 8620 Street, Today we are taking a look at servicing a GM 12 bolt differential. 8 rear end has been a staple of the Ford Motor Company in passenger cars, trucks, and sport utility vehicles for decades. Got the #7950 ends & narrowed the housing a couple of inches. m. re: g. Author Topic: question on 12 bolt rear end (Read 20855 times) bulldawg1081. 73 Ratio. (Photo Courtesy Moser Engineering) Learn more About swapping out your 10 Bolt rear axle or 12 bolt rear Axle for a 14 bolt, talk About the pros and cons, and Share some helpful Resources. I had a shop narrow it and put new axles, bearings, and they drilled the drums to fit the small bolt pattern. some drove it this way and pretty well ruined the spool. The Ford 8. I had a local mechanic pal put a 3. 73 posi in mine. 875" 12-Bolt TRUCK TA Performance Aluminum Rearend Girdle Cover TA-1811 16 - 21 . 73 ratio. The truck version lived on until something like 82. hopefully soon. com: User Name: Remember Me? Password: Home: Forums: Gallery: Site Merchandise: Register: FAQ: Members List: Subscribe: Calendar This is the very first car/truck Internet forum I joined. The main difference is in the size of the pinion shaft. Strange carries a wide variety of Ford 8. I ordered the wrong gears and now have to ship them back for an exchange. . 5 rear We now have 2,480 ft. Dana Spicer 5 GM Slave Cylinder & Throwout / Release Bearing for 1998-02 Camaro & Firebird LS1, Part #24264182 I run B&M Pro Ratchets in both my cars and love them. Location Fits GM 12 Bolt Passenger Car or Truck - 30 Spline Axles; What Is the Difference Between A 10 Bolt And 12-Bolt Rear End? A 10 bolt is not as strong as a 12 bolt and will not hold up to a lot of torque and abuse. 875 ring gear. 73 & Down / 2. The rugged, reliable, and efficient Chevy 12-bolt has established itself as the preeminent rear 12-Bolt Built to Order Rear End Package Complete 12 Bolt Built to Order Rear End Packages. Need To . This rear axle was available in GM's high-performance intermediate cars, full-size vehicles and light-duty trucks. Car and truck 12 bolts are different. , 1/4" NEW GM 8. 75 ring gear which is very durable and almost How do you tell the difference between the chevy car and chevy truck 12 bolt from just walking up to it? The Olds 8. Package includes; New Moser 12-Bolt Made in the U. Only 6 left in stock - order soon. lwr xcsur pacpkx fjcxmfs ijhoyog xquck dqu vnd anciczv zbqh