Gm 12 Bolt Truck Rear End Casting Numbers

Two photos from different distances showing the location of the axle housing casting number NF 3917123 X. Strengthen your vehicle's rear end with the strongest rated support covers you can buy! These lightweight aluminum covers strengthen the rear housing from case distortion under load, preventing increased side bearing clearance and ring gear deflection. For decades, Chevy and GMC trucks, vans, and SUVs came equipped with a 14 bolt axle. The installation of this assembly took place until 2003. (12-bolt), truck Axle Model and get Free Shipping on Orders Over $99 at Summit Racing!. Make: Model: Description: Pinion Bearings: Carrier Bearings: Pinion Seal O. 5", as found in the Chevy Vega, up to the larger GM 11. Anyone know if this will work or not?. Terms & Conditions. Typical applications include ½ and ¾ ton vehicles with 2 or 4 wheel drive made by Chevrolet and GMC from 1963 - 1991. N) The number that your truck came off the assembly line. Anyone have any idea where to look (or know themselves)?. It does mention Dana axles up front, but not in the rear. Years through 1981 to 1989 pickups the VIN # consisted of the division number, GVW Range, Chassis Type, Series, Body Type, Engine Description, and Year. 5" found in Monzas and others is better, it probably won't hold up very well over 300 hp. Stamped Codes: The two letter code is approx. Before we start, let’s identify the parts. I sold a 12 bolt yesterday and never paid attention to the casting number untill the guy loaded it up. We make it easy to verify your. The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF" and no reason has been found yet why they may have one or the other. C 31 6 (march 31st 1966). 12 BOLT TRUCK REAR END The differences are mainly with the pinion bearing size and the ratio/offset breakdowns (different carriers with certain ratios). Please refer to the Differential Identification section for the location of external identification! Identification for GM Differentials. The smaller 10 bolt became into what you need to get in case you ordered a six cylinder or small low perf. Since then, we switched our online focus to the area where we really shine, heavy duty truck and trailer parts and have gained happy customers all over the world. This number is stamped on the forward facing passenger side axle tube. The casting number on my 1966 is 3858174 which is identified as a 327 ci V8 block. Includes 31-spline axles, spring perches, brackets & tabs, Super Light iron nodular case, new pinion yoke, bearings, studs, all fasteners, axle seals and housing vent. Find Ring and Pinion Gears with GM 8. 1963-72 Chevy C10 Truck Rear C-Notch Kit, Heavy Duty Bolt in Type 63-72 Chevy C10 coil spring trucks. So get your Chevy Trucks differentials at Eckler's Chevy Trucks today. Chevy Truck Parts 1947-2012 from USA1 Industries. Codes below are for Chevelle & Monte Carlo. You can find out a lot about your car or truck if you are able to read and decode its VIN number, and that's why we are going to show you how to do just that. The Chevrolet 12-bolt rear axle is a prolific piece. The installation of this assembly took place until 2003. Kleinn Air Horn Bolt On Onboard Air Train Horn System 15-19 Ford F150 Trucks Weld On Parallel 4 Link Suspension Heavy Duty 4. The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF" and no reason has been found yet why they may have one or the other. alright guys need some help here. GM used a lettered system of automobile platform codes for three decades. All Moser 12 Bolt Housings are designed and manufactured in the U. 25" and and afterwards were 8. (Begins at 100,001 at each assembly plant. I have a rear end with the following numbers/stampings: TR 11 21 W 2 J 22 8 - October 22. Rear Ends All the components you need for your vehicles rear end, from yokes and pinions, rear axles, housings, etc for your hot rod, daily driver, off road rig, and race car. Free shipping: GM 12-Bolt TRUCK Solid Adjustable Pinion Spacer w/ Shims - Crush Sleeve Rearend. There are two super easy ways to tell whether or not the transmission is a 6L80E. 1970 and newer should be the wide rearend. Do you like Chevy Inline 6's? We can help you with all of the modifications needed. Installing the wheel bearings, wheel seals, and axles on a chevy 12 bolt axle. This is what I think I have. This kit improves braking by up to 25% over the original drum brakes, while still utilizing your existing master cylinder. 12 Bolt Rear End Chevelle Typically, mineral oil is the routine oil that lubes your engine, however needs regular altering. 1963-69 were the narrow 6 lug 12 bolt. Services 12 bolt GM rearends are what we do. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. Print See Figure 1. 2 Chevy-style has a round cover with an indentation running across the cover (like the 12-bolt Chevy) and 2 casting projections on the top of the rear. Make: Model: Description: Pinion Bearings: Carrier Bearings: Pinion Seal O. Book Excerpt: Chevrolet By The Numbers 1955-1959: Chevy V8 Drivetrain Casting Part Numbers VEHICLE IDENTIFICATION TRIM TAG INFORMATION. My rear axle is a 12-bolt, and I was told when I got the truck that its a 3:73 rear end, with posi. 5", common under 3/4 and 1 ton trucks from Chevrolet and GMC. Differential casting, GM54 and NF3896838. Rear ends for 1937-72 Chevys: Complete rears and parts, 55-64 center sections, positractions and non-posis and "P" case rears; 10 and 12 bolt rear. If your looking towards the rear of the car, on the drivers side there is a number on the lower part of the diff 3969341NF. Find Ring and Pinion Gears with 12 Ring Gear Bolts and get Free Shipping on Orders Over $99 at Summit Racing! GM, 12-Bolt, Truck, Set Part Number: ETN. Re: 12 bolt codes / casting numbers and rear axle ? help Look on the front of the passenger side axle tube for the code about half way between the center section and the brake backing plate. Axle Type Casting No. Identification 3 Identification The Spicer front non-drive steering axles are identified with a tag located between the spring pads, on the front side of the center beam section. Rebuilt GM 14-bolt Differentials. One of the easiest way to identify a Chevrolet engine is by the casting number (c/n) that is cast into the castings (not stamped). A Vehicle Identification Number (VIN) is the 17-digit string of numbers that an automotive manufacturer assigns to a specific vehicle that it produces. Click the button below to add the GM 8. On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. Chevy/GMC Trucks \ 88-98 chevy/gmc 1500 rear end swap a few inches shorter (what did you use) Does anybody know the bolt pattern for wheels on the caprice/impala?. All our Chevy 350 long blocks come with cylinder heads attached and valve train installed. I am trying to ID a 10 bolt rear axle I have fitted to my 55. If you trash the 12-bolt in your '73-to-early-'80 4x4 Chevy truck, you'll be happy to know that you can simply install your 6-lug. Casting numbers found to be the most prevalent in Chevelle 12-bolt rear ends:. 12 Bolt Built to Order Housing & Axle Package 12 Bolt Built to Order Housing & Axle Packages. Description: Motive Gear is an industry leader for GM 12 bolt Truck Ring and Pinion gears, and offers an affordable quiet gear. CONVERTING NON POSI REAR END TO POSI '55 - '64 Chevrolet passenger car and '56 - '62 Corvette By Tom Parsons This article will be specifically directed at converting the 55-64 Chevrolet full size pass car and 56-62 Corvette NON-positraction rear end to positraction using an Eaton aftermarket posi unit. It's worth noting that rear axles can sometimes be positively identified by a casting number and date stamped on the differential cover or axle tube. 875-inch 12-bolt Positraction was the most widely used in 1965-'72 Chevrolet passenger car applications. 07:1 axle ratio, non-posi, 12-bolt rear axle assembled on November 22, 67 or 68 by the Detroit Gear & Axle plant, second shift. Other parts also. The most inclusive G3 rear axle information on the internet! If you have any questions, comments, or corrections, feel free to PM one of the Admins. 5", common under 3/4 and 1 ton trucks from Chevrolet and GMC. Currie ® 9-inch rearends for 1960 thru 1987 Chevy C10 trucks, provide a direct bolt-in solution for those looking to upgrade the rearend of their classic truck car or restomod build. GM Differential Identification & Specs. By decoding the Vehicle Identification Number (VIN), you can also find out what axle ratio your truck has. C 31 6 (march 31st 1966). "FX" stamped axle tubes from 1969 Passenger full-size car; possibly 4-link 12-bolt axle rear suspension 396/427 station wagon and a "3894860NF" stamped axle center section from 1969 Nova/Camaro 3894860NF 1968-69 Chevy II 12-Bolt Axle Center Section Casting Number & 1967-69 Camaro 3894939 1968-69 Chevelle 12-Bolt Axle Center Section Casting Number. Please refer to the Differential Identification section for the location of external identification! Identification for GM Differentials. The list below is a partial list of typical GM RPO Codes, specifically the codes pertaining to Axle Identification, Differential Type and Gear Ratio. ) is in reference to this. I know that Chevy Casting Numbers are on several sites on the World Wide Web but I thought it would be a good idea to list them here too. I hope it helps you identify the Chevrolet engine parts you are working on. by Un-sane » Mon Jun. We specialize in Jeeps, Chevy muscle cars, Mustangs, GM, Ford and Dodge trucks. My mind cannot remember the designation. According to Chevrolet High Performance, the most common GM/Chevrolet rear ends are the 7. This seems to work on all web sites and most documents. originally had drum brakes and leaf springs on it. GM / Chevy - Differential Identification Shop by your differential. It has an E under that # It has 6 bolt axles, so it should be a truck of some sort. I can't seem to find a site to decode this. A bolt pattern of 4x100 would mean that there are 4 holes to fit lug nuts into and that they are 100mm apart. Richmond Gear is the leading manufacturer of professional quality, high performance ring and pinion sets. This differential cover fits GMC and Chevy trucks and SUVs with the GM 8 7/8" (8. 5" rear end" or a "14 bolt full floater" or a "1980 Chevy K30 1 ton 4x4 " or whatever else you have to say to them to get one - but, in my experience (NAPA, Car Quest, Canadian Tire, and a couple of local. 1967-2002 Pontiac Chevy Parts And Accessories. 2 Bellhousing bolt pattern and The next number or two numbers will be the day of the month. com is owned and operated by New Auto Parts, Inc. 875" ring gear and 30 spline semi floating axle shafts. For a posi-traction it should be 3743833. com as a daily part of their ownership experience. 2) and the 12 bolt. From buying research to owner support, join 1. The noise becomes higher pitched the faster I go. The casting numbers are simple to decode. This is from research. GM 12-Bolt Two versions of the GM 12-bolt exist but have nothing more than the bolt count in common. In the case of the M-W casting, it has been seriously beefed up to handle much larger loads than a stock GM 12 bolt. 5" rear end in a Vega is a bomb waiting to go off. Prices and availability are subject to change without notice. 5" 14 bolt in many Chevrolet Silverado and GMC Sierra trucks beginning in the 2001 model year. Rear Axle Identification and Decoding Identify the gear ratio, the build date, the plant where it was assembled the work shift when it was assembled, and positraction source - if equipped. The 62-64 casting number for the posi center case changed to 3789812. Rear Axle Identification 2001 Blazer. Early Ford Beam Axle Identification and Dimensions; How To Box-In a Differential / Solid Axle Rear-End Housing; How To Decode Ford Part Numbers; How To Install a Limited Slip/Posi Unit in a GM 10 Bolt 8. The center housing casting numbers on these were 3969278, 3969278N, & 3969278NF. However, the 10. GM 12 Bolt Truck $320. Though today's GM platforms use Greek characters, they are still encoded with Latin characters in the fourth position. Well I've always been one to feel that a limited slip rear is the best way to go and is a desireable option. 08 Rear End Differential OEM USED-This 1955-1956-1957-1958-1959-1960-1961-1962-1963-1964 Chevrolet 3. This differential cover fits GMC and Chevy trucks and SUVs with the GM 8 7/8" (8. The above are all casting numbers for passenger cars. Truck Parts & Accessories. Bolt patterns can be 4, 5, 6, or 8 lug holes. A different 12-bolt differential was used for light truck applications and those 12-bolt units are not interchangeable. As for all the local and big chain parts stores - they will all gladly sell you a "strap kit" for a "1-ton GM rear axle" or "GM 10. Between 1973 and 2000, a few 14 bolt axle variations were produced. 25" IFS front end parts, to the large 11. Hawks Custom 82-2002 Camaro / Firebird 8. Bolt patterns can be 4, 5, 6, or 8 lug holes. The rear axle identification number must be known to order the exact replacement parts. Rear Axle Identification 2001 Blazer. 73 Ratio: Differential Assembly Kits - Amazon. One of the easiest way to identify a Chevrolet engine is by the casting number (c/n) that is cast into the castings (not stamped). Differential Identification. $400 each obo. 625" axle tube end to axle tube end. The number in the name (Dana 30, Dana 44, etc. 66 67 1967 1966 Chevy Ii Nova Rear End 12 Bolt Housing 3852980n 3. 875 Inch 12 Bolt Truck Ring and Pinion Sets We offer a complete line of rear end parts for the GM 8. com is a specialized wholesale distributor of genuine GM OEM replacement parts and accessories. We have had installations on 2014 to 2018 trucks. A Vehicle Identification Number (VIN) is the 17-digit string of numbers that an automotive manufacturer assigns to a specific vehicle that it produces. This is what I think I have. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. Most (but not all)GM rear ends have the numbers on the ring gear , not a big deal since all you have to do is count the teeth. The number in the name (Dana 30, Dana 44, etc. The casting numbers in this guide will help you avoid spending money on the wrong parts, or also help you purchase the right car when it comes to insuring that it has been properly and authentically restored. 875") ring gear 12 bolt differential. 5",11", or 12"). 875 Inch 12 Bolt Truck Ring and Pinion Sets We offer a complete line of rear end parts for the GM 8. Rear Axle Identification 2001 Blazer. 73 10 bolt rear axle for a 12 bolt 4. Regards, John McGraw. Casting Numbers: 12-Bolt Casting #3917124 early model year, #3959038 has also been found with K88 cast date 10-Bolt Casting #3917123. Truck Restoration, Custom & Rebuilds, Antique Trucks, Truck Collector. However, product information and prices are subject to change without notice. There are many different types, but we'll do a quick pass over the most common ones here. RANDYS carries GM differentials from the small 6. complete rear minus the brakes assemblies Numbers as follows:. The identification tag on the rebuilt rear end was removed from the diff cover by the salvage yard when it was rebuilt. Most Skylark/GS cars from 1968-72 have open (non-posi) rear axles. The 3725899 is the casting # and the D3063 is the date code April 30 1963. Many of these differentials are now more than 40 years old and are due for an overhaul. 8 Rear End Assembly, Available in Custom Width. Traditional BOM’s are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. 5" coporate rear axles. We make it easy to verify your. For a non-posi-traction unit, this number should be 3725899. We've put together this visual guide to help you hone your rear axle spotting skills. This number is stamped on the forward facing passenger side axle tube. Housing, with OEM located mounting provisions, seamless steel tubing (3' O. This rear end was available in a 10 bolt version only. GM differentials come in a wide range of sizes. It's a GM 12 bolt with the following info NF 3896838 GM 60 THA W 0832 2 If anyone can point me in the right direction or let me knowI have been looking on internet for 4 days and still can't find out exactly where it came from. GM 12 Bolt Truck - GM 12 Bolt Truck Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators Product Sheets Y. They bolt directly to the one ton axle and have 10 wheel studs on a 285. The wheel pattern is 6 lug. 10- bolt cover, 12- bolt carrier, 28 spline axles. 95 price: Quantity. Currie ® 9-inch rearends for 1960 thru 1987 Chevy C10 trucks, provide a direct bolt-in solution for those looking to upgrade the rearend of their classic truck car or restomod build. 2 Chevy-style has a round cover with an indentation running across the cover (like the 12-bolt Chevy) and 2 casting projections on the top of the rear. Ford 9 1/2" Information. 308, 342, or 373 gears. The last three numbers are the gear ratios. Kit Number: Buick : 68-70 : All Mid Size (except Skylark Canadian Model) 8. From the versatile and efficient Colorado, to the strong and advanced all-new Silverado and the legendary capability of Silverado HD, if you’ve got a tough job to do, there’s a Chevy truck that’s ready to do it. Complete Axle Assemblies. Re: 12 bolt codes / casting numbers and rear axle ? help Look on the front of the passenger side axle tube for the code about half way between the center section and the brake backing plate. These kits come standard with D154 GM ratcheting calipers. Now offering Hawks Custom 82-2002 Direct Bolt In 8. 14 Bolt Axle Identification Chart October 26, 2018 If you're wondering which 14 bolt axle you have - full-float or semi-float, dual rear wheel or single rear wheel, slide-on drum or stud mounted drum - the chart below will help you figure it out. 12 bolt open carrier cast # numbers for 3 series - Chevelle Tech. For servicing the rear axle, the third letter must be known, which is the manufacturers identity. 5" bolt pattern. Stamped Codes: The two letter code is approx. I have some numbers off a 12 bolt truck rear end I'd like to get help on. 438 inches versus 1. 675 inches). Rear Axle Complete Bearing / Shim Kits Axle Bearings Axle Vent / Breather Bolt Ring Gear Bolt Package Differential Covers Differential Cover Bolt Package Differential Cover Gaskets Weld-On Housing Ends Pinion & Axle Seals Differential Installation Tool Line-Loc Kits; Mounts, Plates & Swap Kits. Also question number two why does it only have 6 lugs, it is a 14bolt axle?. Visual identification markers include the number of differential cover bolts, bolt-in or c-clip style axles, axle splines and the presence of a pinion support. AAM 725 SeriesGM 7. GM 12 Bolt Pinion Bearing. Any ideas on the original vehicle would be great! The diff housing casting numbers: GM 74 E235 date code: E=May, 23=23rd,1975 (?) 3896839 N Axle tube: KAX W216 2. 5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. We can build you a chevelle 12 bolt ,any ratio ,blasted and painted , new gears, new bearings , new posi , new axles , backing plate to backing plate. You can find out a lot about your car or truck if you are able to read and decode its VIN number, and that's why we are going to show you how to do just that. Items may be different than pictured. 5", as found in the Chevy Vega, up to the larger GM 11. Differential casting, GM54 and NF3896838. These casting numbers would have been the same for Corvette rears also, because the rears were ONLY cast and assembled at two plants: Detroit Gear and Axle plant. Visual identification markers include the number of differential cover bolts, bolt-in or c-clip style axles, axle splines and the presence of a pinion support. Find Ring and Pinion Gears with 12 Ring Gear Bolts and get Free Shipping on Orders Over $99 at Summit Racing! GM, 12-Bolt, Truck, Set Part Number: ETN. Ford 9 1/2" Information. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. 308, 342, or 373 gears. number description req usage model year 12 available in kit only pinion gear 2 c/k 2003+ gm 8. GM differentials come in a wide range of sizes. TRUCKS VS TREE STUMPS - Who Will Win?. With the exception of truck differentials with 30-spline axles, and those carrying 2. 5" Conversions Kits in Steel or Aluminum The precision adapters let you run 19. EXAMPLE 610079-9 XXXXX. In the wet of England (like the wet of Vancouver), a limited slip can do 1 of 2 things for you depending on the power and traction you have: 1) either get you going without the hassle of 1 tire spinning or 2) kicking the rear end out when you don't want it to when the tires break loose. Fortunately, you can upgrade your Chevy or GMC to front disc brakes with a disc brake conversion kit from Bob's Chevy Trucks. 5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. For decades, Chevy and GMC trucks, vans, and SUVs came equipped with a 14 bolt axle. Package includes; New Moser 12-Bolt Made in the U. 625" axle tube end to axle tube end. 1955-1964 Chevy 3. If your Chevrolet truck is not listed below, click on the link to search for brake kits by Axle Flange. 66 67 1967 1966 Chevy Ii Nova Rear End 12 Bolt Housing 3852980n 3. 875") ring gear 12 bolt differential. Classic Industries offers a wide selection of 1965 Chevrolet Truck parts, including 1965 Chevrolet Truck interior parts and soft trim, 1965 Chevrolet Truck exterior sheet metal, 1965 Chevrolet Truck moldings, 1965 Chevrolet Truck emblems, 1965 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Axle Guys is the second hand provider of a S10 8. If your looking towards the rear of the car, on the drivers side there is a number on the lower part of the diff 3969341NF. Welcome to the 67-72 Chevy/GMC Trucks Wiki Edit. How to find out gear ratio in a 12 bolt rear end? The number of teeth of the ring may be stamped on it somewhere, just rotate to find. i can't find anyone who can look up casting numbers, on one side it's got the numnbers 3896839 with N under it and on the other side it's got GM56. The noise becomes higher pitched the faster I go. If you trash the 12-bolt in your '73-to-early-'80 4x4 Chevy truck, you'll be happy to know that you can simply install your 6-lug axleshafts into a two-wheel-drive 12-bolt axle and return to the trail. AAM 725 SeriesGM 7. 6 CAST ALUMINUM 10-BOLT REAR END COVER - CAMARO FIREBIRD TRUCK. Includes 31-spline axles, spring perches, brackets & tabs, Super Light iron nodular case, new pinion yoke, bearings, studs, all fasteners, axle seals and housing vent. We have been building the GM Chevy 350 long blocks for almost forty years and still going strong. 25" I bought some drums (since my rear only had the backing plates), and it measures to 61" from outside of the drum to outside. Between 1973 and 2000, a few 14 bolt axle variations were produced. GM Differential Identification & Specs. When lettings off the gas, it will get quiet for a second then the noise comes back but not as loud on the deceleration. 4 results for 12 bolt chevy posi rear end Save 12 bolt chevy posi rear end to get e-mail alerts and updates on your eBay Feed. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Most Skylark/GS cars from 1968-72 have open (non-posi) rear axles. Currie ® 9-inch rearends for 1960 thru 1987 Chevy C10 trucks, provide a direct bolt-in solution for those looking to upgrade the rearend of their classic truck car or restomod build. The 1990 through 1993 Chevy 454SS was a high performance variant of the GMT400 / Chevy C1500 platform. Have a 10 bolt dif and rear end from 80s GMC 4x4 auto truck also $300 each. Dana Dana 30 - Standard, Reverse Rotation, CS & TJ Dana 30 - JK Truck 12-Bolt GM 9. It is the stamped identification number on a 12 bolt rear housing for a Chevy/GMC vehicle that measures 60. ('55-'56 Pontiac rear end will also bolt in, but is different design than stronger '57-'64 units). Ring Gear Diameter: 8. Learn How a Clutch GM 10 bolt front axle vs dana 44 vs dana 60 How to tell what you got 1973-1987 GM Trucks - Duration: 10:18. Some people trash talk the GM 10-bolt as a junk rear end, and if they are talking about the 8. EXAMPLE 610079-9 XXXXX. Most (but not all)GM rear ends have the numbers on the ring gear , not a big deal since all you have to do is count the teeth. 7L, 2wd, auto trans. Chevy 12 Bolt Truck Rear End Girdle - Original Made from 356-T6 cast aluminum, these girdles incorporate a reinforced crossbar. 5" rear end" or a "14 bolt full floater" or a "1980 Chevy K30 1 ton 4x4 " or whatever else you have to say to them to get one - but, in my experience (NAPA, Car Quest, Canadian Tire, and a couple of local. The center housing casting numbers on these were 3969278, 3969278N, & 3969278NF. Chevy/GMC Trucks \ 88-98 chevy/gmc 1500 rear end swap a few inches shorter (what did you use) Does anybody know the bolt pattern for wheels on the caprice/impala?. 875") ring gear 12 bolt differential. K5 Blazer Specifications (1969-1979) Chevy K5 Blazer Specifications Rear Axle: GM Corporate 12-bolt (8. Specific Information, Notes for Casting Numbers, Locations and Other Notes. Dana Differential ID Profile & Information. GM 12 Bolt Rear Ends For cars & trucks. This is a Chevy C-class C&C truck (so bigger than a one-ton pickup, and it wouldn;t have a 14-Bolt rear axle but the pic clearly illustrates the "C&C" concept. I hope it helps you identify the Chevrolet engine parts you are working on. ('55-'56 Pontiac rear end will also bolt in, but is different design than stronger '57-'64 units). , 1/4' wall), custom alloy axles (30, 33, or 35 spline. Plenty of Chevy inline 4 and 6 performance parts in stock and ready to go. Between 1973 and 2000, a few 14 bolt axle variations were produced. 25" This kit will work with 15" wheels Note: This kit will only work with a PRE '93 GM14 BOLT AXLE. Kit Number: Buick : 68-70 : All Mid Size (except Skylark Canadian Model) 8. Part II will be the ring&pinion setup, and Part III will be the replacement of the rear axle. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Originally it a a straight six engine with a 4 speed manual trans w granny low. We've put together this visual guide to help you hone your rear axle spotting skills. T R U C K C H A R A C T E R I S T I C S A N A L Y S I S • ES-1 ([HFXWLYH6XPPDU\ It is important to understand the physical characteristics of the nation’s truck fleet for numerous. In this step-by-step guide, you learn how. GM Positraction rearends have been around since 1957, in several different ring-gear diameters, but the 8. 875-inch differential. It's worth noting that rear axles can sometimes be positively identified by a casting number and date stamped on the differential cover or axle tube. Sbc 327 Block 4 Bolt Main Fresh Bored 40 Over Casting#3959512 1969 Big Block Chevy Bbc 396 375hp 4 Bolt Block 3955272 272 C-21-9. A bolt circle of 4x100 would indicate a 4 lug pattern on a circle with a diameter of 100mm. 875" ring gear and 30 spline semi floating axle shafts. 1970-1972 ~ N3969277. (1967-72) Rear End Pinion Seal 12 Bolt. 875" commonly referred to as the 12 Bolt truck differential, this differential was utalized GM used this very popular differential in there full size Chevrolet trucks starting in 1964 to 1982. Look for the C2AE-BD casting number. It has leaf spring mounts. Rear End Identification Metal Fabrication and Repair Questions Rear End Identification - TriFive. Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. 75" or 14") or number of teeth is more accurate because some 168 tooth flywheels are drilled with multiple bolt patterns, and the aftermarket makes a 153 tooth flywheel that a 11" clutch and pressure plate will fit. alright guys need some help here. GM differentials come in a wide range of sizes. question on 12 bolt rear end that meant that the rear end was built in the year of the number stamped after "gm" well i called in the 3 number code on the top of. 2-bolt Chevy II Nova. 5" 14 bolt in many Chevrolet Silverado and GMC Sierra trucks beginning in the 2001 model year. just like the 10 bolt, and 12 bolt gm rears. 5" rear end" or a "14 bolt full floater" or a "1980 Chevy K30 1 ton 4x4 " or whatever else you have to say to them to get one - but, in my experience (NAPA, Car Quest, Canadian Tire, and a couple of local. See why this axle can easily support 44-inch tires in this. If you look carefully, you will note that the Dana 60 (and 12-bolt Chevy) pinion is closer to the ring gear centerline than the Ford 9" ring gear differential. Related Products GM 8. Truck Info: Dayton Rear Axles with hubs off trailer. Unfollow 12 bolt chevy posi rear end to stop getting updates on your eBay Feed. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. 1964 - 1972 Rear End Axle Rebuild Installation Overhaul Kit, 10 Bolt 8. In our comprehensive General Motors engines guide, we've compiled information about all of GM's current engine offerings, including specs, pictures and more. GM 12-Bolt Two versions of the GM 12-bolt exist but have nothing more than the bolt count in common. RANDYS carries GM differentials from the small 6. Download these exploded view part diagrams and associated part lists to select an AAM series below that matches your GM vehicle. Items may be different than pictured. One other area you should take note of is the entry point for the axle tubes in the coconut. Fortunately, you can upgrade your Chevy or GMC to front disc brakes with a disc brake conversion kit from Bob's Chevy Trucks. It has RV 0306 W 2 stamped on top of Passenger side axle housing. Dana 30: This axle size is the most common, and you'll only find it on the front of Jeep. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. Just Rear Ends is a family owned and operated Rear End Shop located in Reno, Nevada. Please refer to the Differential Identification section for the location of external identification! Identification for GM Differentials. 5 MILLION GM Truck Enthusiasts every month who use GM-Trucks. GM flipped a coin on a lot of things it seems. do NOT contact me with unsolicited services or offers.