Chevy 12 Bolt Identification | eHow. ATS offers replacement u-bolts and upper saddle plates and lower saddle plates in complete kits for Chevy C,K and Chevy Silverado, Sierra Pick Up trucks. Featuring Gm 12 Bolt Rear Ends in stock and ready to ship here online. The best way to tell what you are getting is to go by the casting number. The center housing casting numbers on these were 3969278, 3969278N, & 3969278NF. Chevy engine casting numbers has additional info including links to several sites that have casting numbers broken down to application, etc. 875" ring gear and 30 spline semi floating axle shafts. This brake kit bolts to most 1964-1981 Midsize GM products with 10 & 12 bolt rear ends. if it's non posi, jack up one wheel, turn it exactly twice and count driveshaft revs. 875-inch 12-bolt Positraction was the most widely used in 1965-’72 Chevrolet passenger car applications. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks. These trucks and SUVs came with options for different differentials so please check before ordering. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. GM 12 Bolt Truck. 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. From buying research to owner support, join 1. GM Differential Identification & Specs. com as a daily part of their ownership experience. Chevy Truck 12 Bolt Posi. '57 Olds rear end is same width as '57 Pontiac & '57 Chevy, but used coil springs and requires welding on 2" wide leaf spring perches to fit into '55-'57 Chevy. Air Horns Bed Accessories Bed Extenders Bed Steps Bull Bars Bumpers Cargo Management Extang Tonneau Covers Fender Flares Grille Coverings Handle & Mirror Covers Hood Protection Hood Scoops LED Lights & Brackets Light Covers Lund Tonneau Covers Mile Marker Winches Power Steps Soft Tops - Jeep Step Bars / Nerf Bars Truck Bed Slides Rocker Guards Running Boards Ventvisors / Window Visors. Prices and availability are subject to change without notice. Pinion seal. GM 12 Bolt Passenger Car - GM 12 Bolt Passenger Car Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators Product Sheets Y. Choose from differential rear end support covers for Chevrolet 12 bolt & 10 bolt, 8. 12- bolt axles can be identified by casting numbers on the bottom of the. I do have a few easier options for you to determine the weight capacity of an axle other than using the bolt pattern or the number of lug nuts. 5" wheels on a one ton dually truck. Housing casting number is 383300, carrier is a casting of 698. GM CORPORATE 10-BOLT. We offer classic truck parts for Chevrolet, GMC, Silverado, Blazer, S10 Pickup & more on our online catalog. This diff is desirable to some straight-axle mini-truck and 4runner owners for a couple of reasons. We are everyday enthusiasts just like you. I pulled some numbers off of it hoping yall could help me find out what its from. 5" coporate rear axles. The codes are: B for Buick, C for Buffalo, G for Chevrolet-Gear and Axle, K or M for GM of Canada, O for Oldsmobile, P for Pontiac and W for Warren. 875" 12-Bolt TRUCK Rearend Posi - 30 Spline, Gear, Bearing Kit Package - 3. I e-mailed a salvage yard about the numbers I found stamped on the axle tube of my 10-bolt chevy rear end the numbers are: XKP K211 1 They said that the XKP meant that it was a 8. So get your Chevy Trucks differentials at Eckler's Chevy Trucks today. 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. 625" axle tube end to axle tube end. BASE PACKAGE STARTING AT $2250. Shop for discount Chevy Posi Rear End here. I've recently bought a used 97 Chevy truck with the 5. Items may be different than pictured. 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. using Moser Engineering owned Casting Boxes. 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. 8 is similar to the 12-bolt, it isn't identical. 12 Bolt Casting Numbers Rearend identification. DRK323MK Chevy 12 Bolt Car Timken Master Differential Bearing Kit DT Components® light duty rebuild kits are marketed by The Timken Company. This is what I think I have. Between 1973 and 2000, a few 14 bolt axle variations were produced. N) The number that your truck came off the assembly line. Part #C12T-BS Price $ 130. is anyone able to tell me what i've got?. We want to offer this 1981 to 1989 GM Truck V. I'm trying to figure out what this may fit. By now most of you know that I closed the deal on the 1966 Chevy II, L79 and will be taking the trailer over to pick up the car next week. It has leaf spring mounts. Aside from the obvious, the date code, look for the 4. These last two casting numbers will be the same for 58-61. It has an E under that # It has 6 bolt axles, so it should be a truck of some sort. 8 IN A CRATE, UN-ASSEMBLED. With the exception of truck differentials with 30-spline axles, and those carrying 2. I'm trying to figure out what gears I've got in the rear end. 7l 10 bolt rear end. Casting Numbers: 12-Bolt Casting #3969278 10-Bolt Casting #3969277. 1958-1970 Chevy Rear Differential code Identification Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. Axle Flange Housing Identification Chevrolet, Ford, Oldsmobile, Pontiac — they all use different axle flanges. 160,000 miles There is whining noise under acceleration, cruise and deceleration at speeds over 20mph. Some trucks have the 10 bolt cover (see our GM 10 Bolt Cover). Identifying a 406 cross-bolt block is easy. Dana 30: This axle size is the most common, and you'll only find it on the front of Jeep. 12 Bolt Street Gears are designed to withstand the rigors of everyday driving, and a weekend at the track. Number Decoder diagram for our customers and anyone searching for more education about chassis identification. Prices and availability are subject to change without notice. 11 with a posi unit that. All I have are the casting numbers-NF 3896838. 3/8" in height and is stamped into the axle tube on the inboard, passenger side (toward passenger compartment). 2" rear differential. alright guys need some help here. Rear Axle Identification 2001 Blazer. We make it easy to verify your. Axle spline count varies, with 30 spline being the most common. Read the tech article on a 10-Bolt Identification Guide, brought to you by the experts at Chevy High Performance Magazine. 6L80E Identification. The 4L60E is hardly used for in non-EFI retrofit applications because a MUCH stronger 4L80E can be used with the s. , 1/4" wall), custom alloy axles (30, 33, or 35 spline. Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. Download these exploded view part diagrams and associated part lists to select an AAM series below that matches your GM vehicle. This is not the 10 bolt ring version both cover and ring have 12 bolts. Stamped on the front top of the passenger side axle tube is THB W166 1 E. 73:1 ratio, posi, disc brake axle out of an '88 IROC as a disc to drum conversion. 00 Axle Bearings and Seals only. GM 12 Bolt Passenger Car - GM 12 Bolt Passenger Car Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators Product Sheets Y. 1981-87 GM 10-bolt front and rear solid axles used 28-spline shafts and need an 8. It consists of a two or three letter prefix representing the gear ratio code, four-digit number for the assembly date in a month/day format and a single letter denoting the manufacturing location. From 1968 to 1970, rear axles were 8. Chevy 12 Bolt Truck Rear End Girdle - Original Made from 356-T6 cast aluminum, these girdles incorporate a reinforced crossbar. GM 12-Bolt Two versions of the GM 12-bolt exist but have nothing more than the bolt count in common. This number is stamped on the forward facing passenger side axle tube. This feature will be done in three parts. for more information, visit www. BY PART NUMBER. Chevy stopped installing the 12-bolt in 1972, leaving the 10-bolt to. Rear End Identification Metal Fabrication and Repair Questions Rear End Identification - TriFive. 95 price: Quantity. com is a specialized wholesale distributor of genuine GM OEM replacement parts and accessories. 160,000 miles There is whining noise under acceleration, cruise and deceleration at speeds over 20mph. Introduction: The Dana 44 was introduced after World War II and is commonly found under the front and rear of a wide variety of vehicles. Between 1973 and 2000, a few 14 bolt axle variations were produced. 31 Axle Dia. 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. With the exception of truck differentials with 30-spline axles, and those carrying 2. From buying research to owner support, join 1. 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. 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. I know that it's a 12 bolt (that was easy enough to figure out) but I would like to know if it's a '65 or not. (Begins at 100,001 at each assembly plant. 5” 10-bolt is actually just as strong as a 12-bolt or Ford 9-inch rear, with only a fraction of an inch difference in the ring-gear diameter. For a posi-traction it should be 3743833. It has 31 spline axle gears instead of the Chevy 30 splines. General Motors has a wide range of front and rear ends! We carry everything from the 7. Classic Industries offers a wide selection of 1984 Chevrolet Truck parts, including 1984 Chevrolet Truck interior parts and soft trim, 1984 Chevrolet Truck exterior sheet metal, 1984 Chevrolet Truck moldings, 1984 Chevrolet Truck emblems, 1984 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. 00 Less Axle Bearings and Seals Part #C12T-CBS Price $ 95. GM 12 Bolt Truck. Articles and documentation concerning all North American built Chrysler passenger cars from 1914 to 1980. Codes below are for Chevelle & Monte Carlo. 8-inch axle. Currie 9-inch rearends are built to match the vehicles original equipment axle width, pinion location, suspension mounting points, and wheel bolt pattern - for. Moser Engineering parts for your 63-66 67-72 C10 truck. One other area you should take note of is the entry point for the axle tubes in the coconut. 5" rear end in a Vega is a bomb waiting to go off. The rear end was roughly 58 1/2 from flange to flange, I had thought it was out of an impala or truck due to the large trailing arms and lack of coil spring mounts. 8-inch is very similar to the General Motors (GM) 87⁄8-inch, 12-bolt axle. 875" ring gear and 30 spline semi floating axle shafts. Classic Industries offers a wide selection of 1984 Chevrolet Truck parts, including 1984 Chevrolet Truck interior parts and soft trim, 1984 Chevrolet Truck exterior sheet metal, 1984 Chevrolet Truck moldings, 1984 Chevrolet Truck emblems, 1984 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Bowtieguy's 73-87 Chevy Truck Stop Best rear end gears for a 700r4 w/ 350. According to Chevrolet High Performance, the most common GM/Chevrolet rear ends are the 7. YEARONE Classic Car Parts for American Muscle Cars | Barracuda Cuda Challenger Charger Chevelle Road Runner Camaro Super Bee Dart Duster Valiant Firebird GTO Cutlass 442 Mustang Nova GM Truck Skylark GS Monte Carlo El Camino Mopar Chevy. Do an internet search and look for a site that shows the rear cover of a BOP 12 bolt and a Chevy 12 bolt for quick/easy identification. 12 Bolt GM Rear End Differential Cover Gasket made by Speedway Motors, for as low as $6. We offer the most complete line of rear end parts utilized GM used this very popular differential in there full size Chevrolets, Chevelle, Chevy II, Camaro and and GTO/Firebird. It has an E under that # It has 6 bolt axles, so it should be a truck of some sort. The 1990 through 1993 Chevy 454SS was a high performance variant of the GMT400 / Chevy C1500 platform. Numbers on axle: MC805662 12 Bolt. Select your Chevrolet truck model and generation below to find a complete big brake conversion kit. From buying research to owner support, join 1. For decades, Chevy and GMC trucks, vans, and SUVs came equipped with a 14 bolt axle. Passenger Car; USA Standard axle for '65-'69 4WD GM truck. FYI: The quick way to find parts on this page is to press the "Ctrl" & "F" keys at the same time and just type into the search engine what you are looking for. , 1/4' wall), custom alloy axles (30, 33, or 35 spline. 10 & up; GM Carrier Casting Numbers. TRUCKS VS TREE STUMPS - Who Will Win?. For a non-posi-traction unit, this number should be 3725899. This set uses Timken bearings and races along with high quality seals and small parts. 154 Heavy Duty Truck Parts View All Differentials & Differential Parts x Axle Housings (Rear) Differential Make (Rear) View all 55 Eaton 9 International 22 Mack 3 Mercedes 46 Meritor/Rockwell 1 Mitsubishi 17 Spicer/Dana 1 Volvo. It has leaf spring mounts. Rear End Info: Daytons. 2", then they are not far off, but the 8. If you have a different number, your case is not originaly from a 1960 Chevrolet. I can help with a 'bolt in lump port kit' or a 'performance intake lump port head' work for your inline Chevy 194, 230, 250, 292 and 153,181, 2. Plan Axles Custom Axles Cases & Spider Gears Dropouts & Pinion Supports Kits Spin Free Kit Positractions & Lockers Ring & Pinions Spindles Spools Tools Yokes Yukon e-Catalog Product. This is not the 10 bolt ring version both cover and ring have 12 bolts. The 12-bolt Chevy and the 8 3/4" Mopar rear ends can. 73 10 bolt rear axle for a 12 bolt 4. The installation of this assembly took place until 2003. I hope it helps you identify the Chevrolet engine parts you are working on. 08 Rear End Differential OEM USED-This 1955-1956-1957-1958-1959-1960-1961-1962-1963-1964 Chevrolet 3. Here is my confusion. We offer the most complete line of rear end parts utilized GM used this very popular differential in there full size Chevrolets, Chevelle, Chevy II, Camaro and and GTO/Firebird. The axle reads TDA09 02W2. Before i put in my 4 link and all that jazz, i want to put a posi rear end in my 99 s10. The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. Axle spline count varies, with 30 spline being the most common. 1970 and newer should be the wide rearend. com, 1955 Chevy 1956 chevy 1957 Chevy Forum , Talk about your 55 chevy 56 chevy 57 chevy - Belair , 210, 150 sedans , Nomads and Trucks, Research, Free Tech Advice. Description: Motive Gear is an industry leader for GM 12 bolt Truck Ring and Pinion gears, and offers an affordable quiet gear. 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. 2-bolt Chevy II Nova. Ring Gear Diameter: 8. By decoding the Vehicle Identification Number (VIN), you can also find out what axle ratio your truck has. Kit Number: Buick : 68-70 : All Mid Size (except Skylark Canadian Model) 8. John's Industries 9" Bolt-In Rear End Housing is for 1955-57 Chevrolet. GM 12 Bolt Rear Ends For cars & trucks. Chevy engine casting numbers has additional info including links to several sites that have casting numbers broken down to application, etc. 5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. I'm trying to figure out what this may fit. It has an E under that # It has 6 bolt axles, so it should be a truck of some sort. 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 Truck Master Bearing / Install KitOptional Solid Pinion Spacer UpgradeAll Parts Include 1 Year Manufa. 55 Rear End Differential OEM USED-This 1955-1956-1957-1958-1959-1960-1961-1962-1963-1964 Chevrolet 3. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Order ships free when this item is included and exceeds $99. Between 1973 and 2000, a few 14 bolt axle variations were produced. 6 CAST ALUMINUM 10-BOLT REAR END COVER - CAMARO FIREBIRD TRUCK. Regards, John McGraw. Chevy 12 Bolt Truck Rear End Girdle - Original Made from 356-T6 cast aluminum, these girdles incorporate a reinforced crossbar. SVL Gears for the GM 12T Chevy 12 Bolt truck rear end are dependable enough to be backed by a six-month or 50,000 mile warranty. Note that on this page, unless otherwise specified, Corporate X-bolt means ISUZU Corporate X-bolt, and not a GM Corporate X-bolt -- these terms are NOT interchangeable. 1939 Chevrolet Specifications for Passenger Cars & Trucks Rear Axle: 39: 3/4 Ton Trucks - 3/4 Ton Special Trucks and number: to the Old Online Chevy Manuals. The new corporate 10-bolt started with a medium, 8. 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. 7L, 2wd, auto trans. I've recently bought a used 97 Chevy truck with the 5. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. 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. 12 Bolt Built to Order Housing & Axle Package 12 Bolt Built to Order Housing & Axle Packages. Although these are adequate for typical street driving, they are not suitable for high-performance or extreme use, such as hard four-wheeling or straight-line. lockers, LSD's) from the 8" V6/Turbo diffs can be installed (direct bolt-in) in the hi-pinion diff. Identify the most common GM rear-end types. Housing, with OEM located mounting provisions, seamless steel tubing (3" O. From 1968 to 1970, rear axles were 8. 73 BU1006G1 Casting Date I-12-8 Completely Rebuilt (NOS-2040) Camaro 12 bolt 3. i've got a GM diff it's got 12 bolts on the cover and on the ring gear, i'm having trouble getting axle seals for it becuase i don't know what it came out of. Showcasing Gm 12 Bolt Rear Ends available for sale right now on the internet. Dana Differential Axle Codes · Dana Differential ID Chart & Profiles · Differential ID Locations, manuals and parts. The axle reads TDA09 02W2. 73 gears (series two), the differentials will support all gear ratios without having to change carriers. 5 MILLION GM Truck Enthusiasts every month who use GM-Trucks. Month of Manufacture. Currie 12-bolt Rearends for 64-72 A-body vehicles are complete, ready to bolt-in assemblies, with a choice of popular differential type, gear ratio and brake options, making it easy to customize the package to meet almost any need. Truck Info: 1988 Toyota Box Truck. I did a search in google for the cast number, a few things came up, a few chevy trucks in the 60's to 70's range. Information, pictures and links for 1962 to 1968 Dodge and Plymouth Maximum Performance 'Max Wedge' and 'Race Hemi' race vehicles. It was under my '80 Z when i bought it. Chevrolet GM 8. Truck Parts & Accessories. Order ships free when this item is included and exceeds $99. I was told this came out of a 1969 C10 with 6 lug axles, but can't find any information to confirm this. Chevy C10 / C15 rear suspension. The same bearings we use when build-ing a customer's. by George Nenadovich. This identifies the car make and model, gear ratio, date of casting and assembly and factory of origin. N) The number that your truck came off the assembly line. General Motors has a wide range of front and rear ends! We carry everything from the 7. The casting number is the definitive way to know if your engine is the newer design. ATS offers replacement u-bolts and upper saddle plates and lower saddle plates in complete kits for Chevy C,K and Chevy Silverado, Sierra Pick Up trucks. 25" and and afterwards were 8. I have a rear end with the following numbers/stampings: TR 11 21 W 2 J 22 8 - October 22. 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. I'm trying to figure out what this may fit. This page is devoted to providing information on my 1970 C/10 Chevrolet pickup truck. Part one will be all the "prep" work done to the axle. From 62 - 72 GM liked to use an Eaton rear axle too (in addition to the 12 bolt). Rebuilt GM 14-BOLT Differential. Download these exploded view part diagrams and associated part lists to select an AAM series below that matches your GM vehicle. The number of teeth is stamped on each gear. 2-bolt Chevy II Nova. The same bearings we use when build-ing a customer's. Prices and availability are subject to change without notice. Plenty of Chevy inline 4 and 6 performance parts in stock and ready to go. GM Corp 14-Bolt Rear Axle. 875 Ring Gear Diameter 30 Spline Pinion 1-1/8" Pinion Nut Ring Gear Bolt: 9/16" Head, 3/8"-24 R. Chevy Truck Identification Guides; Rear Axle Identification (Chevrolet) 12 = Day of month. Wearable parts, such as u-joints, tie rod ends, bushings, hub carriers, calipers or rotors are not refurbished. by George Nenadovich. is anyone able to tell me what i've got?. The first letter of the part number indicates manufacturer. I did a search in google for the cast number, a few things came up, a few chevy trucks in the 60's to 70's range. It can be a bit hard to see with the ignition shielding in place but the numbers are fairly large. Big Block Chevrolet casting number Numéro figurant à l'arrière du moteur côté boîte de vitesse accueil engine code. 73:1 ratio, posi, disc brake axle out of an '88 IROC as a disc to drum conversion. by George Nenadovich. Please refer to the Differential Identification section for the location of external identification! Identification for GM Differentials. General Motors has a wide range of front and rear ends! We carry everything from the 7. This is not the 10 bolt ring version both cover and ring have 12 bolts. We offer the most complete line of rear end parts utilized GM used this very popular differential in there full size Chevrolets, Chevelle, Chevy II, Camaro and and GTO/Firebird. This set uses Timken bearings and races along with high quality seals and small parts. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Example: VIN # 9NH323885 would be a dump truck (less winch) made in Norwood, OH in August 1943 with a production number of 3885. Can anyone help me find out the meaning of the casting numbers and axle code. Made of grade 8 steel, these replacement u-bolts will help replace your rusty or broken existing leaf spring ubolt. Bowtieguy's 73-87 Chevy Truck Stop Best rear end gears for a 700r4 w/ 350. It appears to be possitrac with a ratio of about 3 and a quarter( a little less). Before we get into further explanations of Casting Numbers, if you are trying to decipher the VIN plate on the Trucks Drivers Side Door Jamb, you can get that information on our History Page Here. I recall my 77 manual mentions all the GM axles, and says to consult the HD Truck manual for the 12. TCI Engineering fabricates all of its 1937-1939 Chevy pickup 9 inch Ford Rearend housings in-house using only high quality 100% Curries 9-Plus rear end components. Now gm has discontinued the parts and basically said to replace the axle to a straight axle. Here, 40 ÷ 13 = 3. Introduction: The Dana 44 was introduced after World War II and is commonly found under the front and rear of a wide variety of vehicles. 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. 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. The C-shaped steel clip slides into a groove around the axle about 1/4 inch from the end. Buy high quality used 1995 Chevrolet K1500 Pickup Rear Axle Assembly cheap and fast. 25 wide brake shoes and that it was between a 1993 to1995 year model. by George Nenadovich. I have a Oldsmobile 12 bolt rearend (actually i have 3) 1 is from a 70 Delta, 1 in a 72 Delta, and 1 in a 73 Wagon. Years through 1981 to 1989 pickups the VIN # consisted of the division number, GVW Range, Chassis Type, Series, Body Type, Engine Description, and Year. Regards, John McGraw. Make: Model: Description: Pinion Bearings: Carrier Bearings: Pinion Seal O. 1958-1970 Chevy Rear Differential code Identification Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. Now in case you ordered an excellent block or extreme time-honored performance small block you need to get a 12 bolt. non Posi-trac, casting number 3896839N, asking $100 or best offer. JEGS Embossed Rear End Support Cover GM 12-Bolt (Chevy) Only $158. 1937-1946 Classic Chevy GMC Truck Parts @ OldChevyTrucks. ATS offers replacement u-bolts and upper saddle plates and lower saddle plates in complete kits for Chevy C,K and Chevy Silverado, Sierra Pick Up trucks. However, it should be an older GM axle, they had their own in the 40's. 12 bolt open carrier cast # numbers for 3 series - Chevelle Tech. Rear End Info: Daytons. We strive every day to bring only the best in Chevy Trucks rear differential parts. 00 Less Axle Bearings and Seals Part #C12T-CBS Price $ 95. 25" IFS (2010 and Older) Truck 14-Bolt GM 11. From buying research to owner support, join 1. This kit improves braking by up to 25% over the original drum brakes, while still utilizing your existing master cylinder. I do have a few easier options for you to determine the weight capacity of an axle other than using the bolt pattern or the number of lug nuts. For a posi-traction it should be 3743833. 438 inches versus 1. Big Block Quick Facts Copied from Chevrolet Big Block Parts Interchange Manual Magazine. So get your Chevy Trucks differentials at Eckler's Chevy Trucks today. ZA G26013313 - USA Standard axle shaft for 2WD 12 bolt truck & 8. When i purchased it I asked for a 67-69 Camaro axle. The casting numbers are simple to decode. ive got a 12 bolt posi rear end with 3. K5 Blazer Specifications (1969-1979) Chevy K5 Blazer Specifications Rear Axle: GM Corporate 12-bolt (8. Common 70's GM rear ends 12 bolt Olds: 12 cover bolts,12 ring bolts, large round cover, 31 spline BIA's No gears available, steepest stock set 3. The rear axle identification number must be known to order the exact replacement parts. GM / Chevy - Differential Identification Shop by your differential. Allows for more axle. 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. It is the stamped identification number on a 12 bolt rear housing for a Chevy/GMC vehicle that measures 60. We strive every day to bring only the best in Chevy Trucks rear differential parts. I sold a 12 bolt yesterday and never paid attention to the casting number untill the guy loaded it up. The Casting dates can be found on the right side of the block opposite the casting number. Differential Carrier Cases. There are many different types, but we'll do a quick pass over the most common ones here. The following reasons explain why I made the decision to do this rear end swap. By now most of you know that I closed the deal on the 1966 Chevy II, L79 and will be taking the trailer over to pick up the car next week. N) The number that your truck came off the assembly line. I have the code " N 3856525" stamped into the gusset. Is there a place I can look to find the gear ratio for ther rear end of my 1964 c10 stepside truck? It has a 12 bolt rear end in it. We offer classic truck parts for Chevrolet, GMC, Silverado, Blazer, S10 Pickup & more on our online catalog. Classic Parts USA offers Truck Parts for sale from 1936-1991 specializing in Chevy and GMC Truck Parts. For a non-posi-traction unit, this number should be 3725899. GM CORPORATE 10-BOLT The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. 25 wide brake shoes and that it was between a 1993 to1995 year model. Numbers on axle: P102013. The posi manufacturer codes are D for Dana, E for Eaton, and W for Warner. The 12-bolt came in many different stock ratios, and it is a great donor candidate for GM owners wanting a differential with a lower ratio (more. Both of these are semi-floating axles. Buy online now. 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. Each axle will move in about 1/4″. However, the 10. C&C trucks are sold commercially for use as work trucks to customers who need to fit their own specialized bodies such as service trucks, welding trucks, wreckers, and small dump trucks. JEGS carries a great selection of differential covers from Trans Dapt, Mr. 308, 342, or 373 gears. Providing Expert Advice with over 35 Years of Experience and Free Shipping on Orders Over $75. If you’re wondering what kind of 14 bolt axle you have – and you’re working with a 14 bolt axle from the year 2000 or older – this guide is for you. 6l Vin 8th Digit Windsor 6 Bolt Flywheel 129k Oem $799. 12-bolt axles can be identified by casting numbers on the bottom of the cast-iron center-section and on the front of the passenger side axle tube. Truck Parts & Accessories. CHEVROLET 12-BOLT PASSENGER CAR Ring and Pinion Sets We offer complete coverage of ratios for your 12-bolt rears. 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.