23 & up;. 5" rear end parts for 1-ton trucks. Web. Product Details XF Flow XFX-301 Gloss Black Red Milled Part Number XFX-301261451271397-7GBMR Size 26x14Bolt 5x5 Alt Bolt 5x5. First, look at the casting number of the center section. GM Engine Casting Numbers (Sorted by MakeCID) Chevrolet Casting Numbers Number Make Year CID 839910 Chevrolet 42-51 216 389770 Chevrolet 42-51 216 839770 Chevrolet 42-53 216 3835253 Chevrolet 42-53 216 3835794 Chevrolet 42-53 216 3835497 Chevrolet 42-53 216 3835849 Chevrolet 42-53 216 3897702 Chevrolet 42-53 216. 6-inch units; 3. Divide the larger number by the smaller number; in this case, we have a 39 divided by 10, or a 3. The same block could appear in both 2-bolt and 4-bolt main configurations, depending on application. 5" 8. Power is transferred to the back wheels via a column-shifted TH400 3-speed automatic transmission and a 12-bolt rear end. 1931 Sedan Delivery 31570. (Amended by Stats. 36 cok col fb 1970 3. Above the axle tube on the carrier is another casting number "E10 3". After compareing the chunk to one of my camaro rears, they were the same. To the Front of a Trailer(1) A turn signal lamp may not be combined optically with a stoplamp unless the stoplamp is extinguished when the turn signal is flashing. Gm Rear End Casting Numbers Decode. Parts & Dealers. 375" 12 bolt, used from &x27;55-&x27;62. 36 posi (metallic brakes) DN - 3. There is number on the passenger side axel tube facing the front of the vehicle. 36 Rear End Differential Complete 4 24 63 65-66 Corvette Rear end Differential for 411 Posi AP 11-1-65 with 273 posi shipping C2 Corvette Rear end Differential 4. Block castings 3837004 Date Code A 11 7 Head Casting 3836848. According to my research this is correct for a 1957 truck. It is the 9. Then you can look it up in the rear end codes section. Rear axle camaro 1967 bolt casting code end chevy gm numbers location 1969 nova chevrolet tube impala 1965 codes 1966. The same block could appear in both 2-bolt and 4-bolt main configurations, depending on application. 1964-1968 Chevrolet Chevy II. - Replace the front-axle modulator, if the wiring of the relevant wheel speed sensor ist faultless 789 4 Wheel Sensor ABS Axle 1 Left-voltage belowwww. General Motors transmissions can be identified by casting numbers, manufacturing codes, and the shape and number of bolts on the transmission pan. What are the casting numbers for a Chevy engine Here is a list of casting numbers, along with their original applications. 55 ratio. For the 1972-75 Camaro style model 8. it has disc breaks 55" between rotors. The Chevrolet By The Numbers Book Says 68-69 Rear Ends Came With A Casting Number Of 3894939. Jeep builder Registered. Power is transferred to the back wheels via a column-shifted TH400 3-speed automatic transmission and a 12-bolt rear end. Results 1 - 24 of 1000. Block castings 3837004 Date Code A 11 7 Head Casting 3836848. 55 wv xv gto 455 ho only(c-type axle) 12 bolt 1970 3. 5 inch, 10. 3 Synergy Special Edition 2. I know it is an 8. 4 2010 Indianapolis 500 Pace Car Special Edition (RPO Z4Z) 2. The Differential in this car is a 10&39; bolt, 8. 1962-1964 Impala Reproduction Armrest, Completely. Using a 3. 90 wk yk gto only used with m-21 trans 1970 4. May 17, 2003 2,601 Posts. The casting numbersletters 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. All he knows at this point is that the rear axle assembly is a GM unit of some type and that it is possibly Chevrolet. If it was always that easy, though, we wouldnt need to go further. Above the "GM 55", there looks like a dial of some sort Finally, I see these identification numbers on the rear passenger side webbing. most popular vintage clothes Rebuild HPGKYB Std Shock. The casting is 1254333, with a casting date of B 15 8. 90 wk yk gto only used with m-21 trans 1970 4. The casting date on the L6 block is on the right side. In response to 100 CHEVY. The "sure-fire method" , the one with no possibility of being wrong - is to get the number of teeth or the ring and. 1970-1972 Chevrolet Monte Carlo. Not sure about that Casting number. The Chevrolet By The Numbers Book Says 68-69 Rear Ends Came With A Casting Number Of 3894939. The Chevrolet By The Numbers Book Says 68-69 Rear Ends Came With A Casting Number Of 3894939. Likewise, ring gear thickness must increase to properly mate to the smaller diameter pinion. Divide the larger number by the smaller number; in this case, we have a 39 divided by 10, or a 3. Chunk is. Stamped &39;s on pass. Then you can look it up in the rear end codes section. Unit was cast on May 13, 1964 (E1364), and assembled in Buffalo on June 8, 1964 (BB0608). 1933 Standard Sports Coupe 33628. Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. Unit was cast on May 13, 1964 (E1364), and assembled in Buffalo on June 8, 1964 (BB0608). dana 44 rear axle parts diagram. Does not need a rebuild. Those number might tell the better story. 2" Rear GM 8. 1964-1972 Chevrolet El Camino. General Motors transmissions can be identified by casting numbers, manufacturing codes, and the shape and number of bolts on the transmission pan. Web. It was the fourth and final iteration of the third generation of the Commodore and the last to spawn a coup variant. Thanks Guy. That type of rear end was used from &x27;55-&x27;64, with different widths & spring mounting hardware for different cars. 2 versus 8. Block castings 3837004 Date Code A 11 7 Head Casting 3836848. Sep 28, 2011 It is a 12 bolt rear end, and here is a pic (just one off google that i edited) of what the casting numbers are, and where they are at. 5-inch ring-and-pinion from a &39;70-&39;81 Camaro. GM 8. To the Front of a Trailer(1) A turn signal lamp may not be combined optically with a stoplamp unless the stoplamp is extinguished when the turn signal is flashing. 6 ring gear. The list below is a partial list of typical GM RPO Codes, specifically the codes pertaining to Axle Identification, Differential Type and Gear Ratio. forged, nitrided, cross-drilled, 5140 steel 3804816. 57 housing is the only housing with a drain plug. There is number on the passenger side axel tube facing the front of the vehicle. 5" 10 bolt. The 1960 Valiant exemplified Chrysler&x27;s leadership in aluminum die casting. "A" casting on upper left 5. casting date I 27 7 (last digit is a little ground down but I&39;m fairly certain it is a 7) so September 27th 1977. 23 posi 65 Mustang convert. Just below is the casting number "3790614". the A-body rears from these times JUST PLAIN stay away from. 53K views 6 years ago Differential Tech Tips In this tech tip we&39;ll show you how to identify what type of GM differential you&39;re using by decoding the RPO code (or option code) found on a. Mine came out of a drag car and has been narrowed, which removed the stamp marks on the tube. The third members are "swappable" 55-64 full size, 56-62 Corvette, and 62-63 Chevy IINova (but the Nova are really light weight. Even if you don&39;t have overdrive. Web. Chevrolet or C type rear ends typically have C-clips retaining the axles. Posts 16. Click on your year or scroll down 1970 1958 Back to Top 1959 Back to Top 1960 Back to Top 1961 Back to Top 1962-1964. 5 SLP Performance ZL550ZL575 Special Edition 2. i&x27;m not sure that the rear end is original to the truck. Differential casting, GM54 and NF3896838. 00) 6-25 of 28 cars Sort by Date (recent) On page 20. 2 versus 8. Chevrolet or C type rear ends typically have C-clips retaining the axles. The casting number on the rear end center section is F2931s. Web. Those number might tell the better story. Gary, 1965 Chevelle 3859140N. 1964 Chevelle Rear Axle and Differential Identification. 90 ring-and-pinion ratio. You can typically find your RPO code on driver side door panel or glove box. For the most part, Chevy stopped installing the 12-bolt in 1972, leaving the 10-bolt to shoulder. 625" Ring Gear Diameter 7. Jeep builder Registered. 14094065 Leave a comment at the end of this post if you cannot find the information you want. Often enough it is hand stamped and you might have to clean it up a bit to be able to read it fully. Numbers are starting to fall in line for an original drive train. According to my research this is correct for a 1957 truck. The Bill of Material (BOM) number is used to identify Dana differentials. i&x27;m not sure that the rear end is original to the truck. 5 rearend denotes it is usable for any 1978-88 GM A or G-body intermediate like a Cutlass, Monte Carlo, El Camino, Malibu, Regal, or Grand Prix. 6" IFS - Front - Late Model Midsize Truck GM 7. 2 Rear Axle Common Applications. (posted on February 21st, 2016). You may also hear spring stiffness referred to as pounds; for example, a "4-pound" spring. Numbers are starting to fall in line for an original drive train. You can typically find your RPO code on driver side door panel or glove box. The third members are "swappable" 55-64 full size, 56-62 Corvette, and 62-63 Chevy IINova (but the Nova are really light weight. 2 Transformers Special Edition 2. "The L31 Vortec comes in two different casting numbers, 10239906 (906) or 12558062 (062). 1970-1972 Chevrolet Monte Carlo. not sure what is original on this, but it has a type 4 carrier with 4. Web. Trying to Identify the rear end that is in my truck. Block castings 3837004 Date Code A 11 7 Head Casting 3836848. Kinda like the difference in a 396 and 402 chevy motor, for those old enough to. 73 none coz fb 1970 3. The pinion shaft diameter on these rear ends was 1 78 inches, and these pinion shafts were either 10- or 29-spline. For example, you might see 3994-1 for the BOM, but the 60 has been dropped and the actual BOM is 603994-1. Give us a call at 800-216-1632 to get started. 1933 Standard Sports Coupe 33628. Please select a rear end that matches your vehicle below. Power is transferred to the back wheels via a column-shifted TH400 3-speed automatic transmission and a 12-bolt rear end. Casting Codes - Pontiac Power Net Where to find the Casting Code Casting codes for 1955 to 1963 are found on the passengers side of the block. Dec 24, 2013 Casting number 1253741 rear end housing is 76 Monte Carlo thats what is in mine How strong is a 10. J - 3100-3200-3800CK 10-20, C30 Regular Production JA - CK 10-20, C30 with RPO 311 JB - C10-20 with RPO 311 JC - 4000 (31-32-36-3800 RPO 227)C40 CK 10-20, C30 RPO 223 JD - CK10-20, C30-40 with RPO 225 (HD Clutch) JE - C1402 with RPO 232 JF - 31-32-36-38-41-4400 with RPOs 314 & 321 JG - P10 Base. 5" but here are the numbers casting 1254333 casting date I 27 7 (last digit is a little ground down but I&39;m fairly certain it is a 7) so September 27th 1977. 25" Corvette Rear, 1963-1979 GM 8. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. Web. 4" on the side of a big block 454. Web. 1 Development 2 2010 model year 2. 1962-1964 Impala Reproduction Armrest, Completely. Do just what you did only turn the wheel 20 times while counting the driveshaft revolutions, then divide your driveshaft number by 10 (this is for a non-posi rear, only jack up one side) For a posi rear, spin the wheel 10 times (both sides jacked up) and divide by 10. It is located on the rear, top left (drivers side) for all others. 25" IFS front end parts, to the large 11. Read more about GM RPO Axle Identification Codes Need help identifying your differential or not sure which replacement or performance parts you need Call our staff of differential experts at (800)510-0950. Step 1 Engine and Transmission Mounts. Show entries Search. 1966 Chevelle 3875745N. BOP gears are real expensive and so are the posi units. Listed 1967 "AQ" and "AR" codes & ratios may only have been used early in the 1967 model-year, or not at all. The casting date on mine is L4 0 (Yes, this is how it looks only three digits with a space between the L4 and the 0) not exactly the same as Dougs Looking at the housing it looks like it had the tabs on the bottom and they where broken off also the cover is smooth no "V" is it possible this is an 8. com TA Performance. Twelve-bolt differential carriers are attached to the differential assembly using two main caps. May 17, 2003 There will be some letters then some numbers, just a few letters though 2-3. 2 Transformers Special Edition 2. I was wondering if you can use the casting number to find out your gear ratio rear axle was 3977323 14 bolt rear GM 10. See also 1965 Chevelle rear axle information page. 2 rear but was considered stronger better that the BOP 10 bolt and the GM 10 bolt in 8. Then you can look it up in the rear end codes section. I can&x27;t find that number, but 3969341NF shows up as a 70 Camaro 12 bolt. Web. Gary, 1965 Chevelle 3859140N. 69B350 69 TH400 for use with 427 (L36) engine assembled on December 16th. 90 wk yk gto only used with m-21 trans 1970 4. If all that rings true, you have differential identification, but nothing to define which Chevrolet model it belongs to, which puts you at . It appears that 12 bolt rear axles with casting number 3969341 started showing up in 69 Camaros sometime around early August of 1969. 73 none coz fb 1970 3. Ring Gear Bolt Size. is for a 68 or 69 rear end however see what the date code cast into . gm-ax-17249 tie rod axle joint track rack end right hand rh, left lf joints axe suspension nearside ns steering near up, close side offside lower bottom upper down replace inner 1x, replacement outer set kit 24-21864 ar7734 44-08904 12371381, 4060426382704 l31 lq9 (364cuv8) lz1 l92 l94 l9h l86 lmg dys, ly5 (325cuv8) quick steer talosa chevrolet. Parts & Dealers. casting date I 27 7 (last digit is a little ground down but I&39;m fairly certain it is a 7) so September 27th 1977. 55 open (4cyl - 3 speed manual) DD - 3. 25" IFS Clamshell Front End GM 8. 455 ho only(c-type axle) 12 bolt 1970 3. 55 cow cox fb 1970 3. 80 shipping. com Need Your Parts FAST Call (800) 510-0950 For the fastest and most accurate service, call our Differential Parts Experts for immediate assistance. 2 lis 2018. com using their unique General Motors. 10-Bolt Casting 3969277. Chevy V8 BBC Block and Head Casting Numbers. 51 Gloss Black W Milled Red Inner XF Forged XFX-301 Wheel (Series XFX-301). Web. Dave Last edited Aug 29, 2016. A collection of quick tips on how to identify some of the more common types of differentials, and an overview of the different styles of . This code will tell you the ratio, whether it is posi or not, any special notes and what plant it was made at. 13 gru 2022. For example, you might see 3994-1 for the BOM, but the 60 has been dropped and the actual BOM is 603994-1. I have a few but can&39;t come up with that one. Kinda like the difference in a 396 and 402 chevy motor, for those old enough to. 5" Rear End GM Dana 60. I was told this came out of a 1969 C10 with 6 lug axles, but can&39;t find any information to confirm this. The easiest way to identify the 8. The 283 from 1957 was pushing the upper limit of the design limit. Apr 19, 2008 pretty sure it 1979 three should be a code on the diff that will tell you the diff size or get the off the in side gears. The date consists of a letter and three numbers, i. Web. The "sure-fire method" , the one with no possibility of being wrong - is to get the number of teeth or the ring and. Trying to Identify the rear end that is in my truck. Give us a call at 800-216-1632 to get started. (SB 814) Effective January 1, 2022. Web. The axle reads TDA09 02W2. The third members are "swappable" 55-64 full size, 56-62 Corvette, and 62-63 Chevy IINova (but the Nova are really light weight. 55 cow cox fb 1970 3. I have a few but can&39;t come up with that one. According to my research this is correct for a 1957 truck. Junkyard Dog 262088 112512 0139 PM. 25" IFS Clamshell Front End GM 8. Casting codes for 1955 to 1963 are found on the passengers side of the block. According to my research this is correct for a 1957 truck. Its a GM 12 bolt, number cast into the housing on the front passenger side is NF3896838. This semifloating rear axle features a 10-bolt cover and appeared in various. 25 at 106mph 78 Firebird 350T350 3. General Motors transmissions can be identified by casting numbers, manufacturing codes, and the shape and number of bolts on the transmission pan. 14094065 Leave a comment at the end of this post if you cannot find the information you want. 5 inch. MUCH Appreciated 68NovaSS Administrator Joined Sep 14, 2002 6,193 Posts 2 Dec 15, 2015. Jeff Smith When Chevrolet built the first Camaros in 1967, they were already in production of both 10- and 12-bolt rear-end housings. What can be found on the axle housing is the stamped axle code with assembly date, housing casting number and date housing was cast. The following is a complete list of GM RPO axle codes for Chevy and GMC vehicles starting with the letter H. The 10 bolt Chevelle rear end has the 8. Web. 1966 Chevelle 3875745N. Our experts will help you find the correct ring and pinion set for your particular application. The casting date on the L6 block is on the right side. 9375 inches wide by 10. dana 44 rear axle parts diagram. Reported on several 1965 Chevelles but no image of one yet. 2 series (2. (Amended by Stats. Also has a stamped number BA 317 and also says GM 8. 5" & 7. 90 11. Give us a call at 800-216-1632 to get started. Pinion spline is 30, axle spline is 28, ring gear measures 8. According to my research this is correct for a 1957 truck. (Accurate identification using the GM RPO code assumes that the rear end has not been previously modified) The prefix is usually F, G or H when referring to Axle Identification. GM Chevy - Differential Identification. 2 Rear Axle Common Applications 1964-1972 Chevrolet Bel Air 1964-1972 Chevrolet Biscayne 1967-1970 Chevrolet Camaro 1965-1971 Chevrolet Caprice 1964-1968 Chevrolet Chevy II 1964-1972 Chevrolet El Camino 1964-1972 Chevrolet Impala 1970-1972 Chevrolet Monte Carlo 1968-1972 Chevrolet Nomad 1964-1972 Chevrolet Nova. 2 versus 8. 10&x27;s Joined Mar 13, 1999 21,232 Posts 4 Dec 31, 2016. 1967 Chevelle 3894939NF. According to my research this is correct for a 1957 truck. There is number on the passenger side axel tube facing the front of the vehicle. It has RV 0306 W 2 stamped on top of - Answered by a verified GM Mechanic. 5" Rear End GM Dana 60. Those casting numbers can be difficult to read due to . 6" IFS - Front - Late Model Midsize Truck GM 7. The same block could appear in both 2-bolt and 4-bolt main configurations, depending on application. The 8. 5 rearend denotes it is usable for any 1978-&x27;88 GM A or G-body intermediate like a Cutlass, Monte Carlo, El Camino, Malibu, Regal, or Grand Prix. Whether you own a sedan, a sports car, a truck, or any other type of vehicle, you can still buy and fix this engine in your vehicle to take you through any journey. Web. Sometimes the casting numbers . Meanwhile, youll find the application code at the front of the block on the passengers side. It was the fourth and final iteration of the third generation of the Commodore and the last to spawn a coup variant. FORD AXLE IDENTIFICATION TAGS. best site for interracial porn, craigslist portland cars for sale by owner
I also noticed a casting number on the front side of the pumkin as GM 73. . Gm rear end casting numbers
A magnifying glass. This chart applies to most GM 8. Web. 1 (780) 907-1965 Dec 11, 2020 61 Photos. 2 versus 8. Casting codes for 1955 to 1963 are found on the passengers side of the block. Donald, the pics above are missing your type of rear end. 311, Sec. These numbers are stamped on the edge of the ring gear. (Accurate identification using the GM RPO code assumes that the rear end has not been previously modified) The prefix is usually F, G or H when referring to Axle Identification. However, are there any 1254333 rears that will NOT fit 1969 X66 396 LeMans Blue, M20, 373 (Sold) 1969 Convertible LS3 TKO 600, 373 Save Reply Quote DOUG G Moderator 1968 Camaro LS swap, TH350 FMFVB, 5000 stall, 12 bolt w 35 spline and spooled 4. Mopar Rear Axle Identified by casting number & number of cover bolts. Web. 56 posi (a series 2 posi carrier is in it) G Detroit Gear and 82721 should equal a day of the year and the shift it. Ring Gear Bolt Size. Show entries Search. 5" across the gear face. Search your casting number. It is located at the base of the housing, on a flat surface facing upwards. Block castings 3837004 Date Code A 11 7 Head Casting 3836848. I believe 3725899 is an old Chevy car rear end with the drop-out center section. 455 ho only(c-type axle) 12 bolt 1970 3. Dec 24, 2013 Casting number 1253741 rear end housing is 76 Monte Carlo thats what is in mine How strong is a 10. Web. 90 rear axle gear ratio as an example 2. Web. 1974 A and G Body Rear Axle ID This chart applies to most GM 8. GM 8. this is for one used chevy chevrolet and corvette empty rear axle housing, (empty case with caps), (gm casting number 3707306, gm group number 5. The casting is "GM1". Web. It has a tag under one of the ten bolt center section that indicates it has a 3. 5-inch ring-and-pinion from a &39;70-&39;81 Camaro. Rear ends with 3. There will be some letters then some numbers, just a few. Anyone having photos of rear end casting numbers with "N" or "NF" or "X" in. diagram wiring powerstroke acm ford OH4674 Chevy 350. I contacted CRG and they said that is a &39;70 rear, and &39;70 was a changeover year. 1 kwi 2008. 1964-1972 Chevrolet El Camino. 1970-1972 Chevrolet Monte Carlo. 6" 193mm. 10 Holes. 36 cok col fb 1970 3. The axle reads TDA09 02W2. 55 wv xv gto 455 ho only(c-type axle) 12 bolt 1970 3. I am pretty sure it is a 10 bolt 8. Off Road Parts, Suspension, Steering Kits, Diff Covers, Fab Parts, Brake Parts, & Bumpers. Rack and pinion steering, vintage air, disc brakes, all new paint, interior, rear end, and brakes. Numbers are starting to fall in line for an original drive train. Gm 10 Bolt Gear Ratios You might be asking yourself what gear ratio is best for your GM 10 bolt. Go to Differential Tags. 13 kwi 2018. Applications are similar to the big GM 14-bolt and the Dana 70. Numbers are starting to fall in line for an original drive train. 1963-1967 Corvette Rear Axle Codes and Ratios 1963-1964 1965-1967 Note All 1965-67 Corvette rear axles were manufactured at Warren and are suffixed "W". May 03, 2013 Grease Monkey. 1974 A and G Body Rear Axle ID. 5Offset -76 Hub Size 78. That type of rear end was used from &x27;55-&x27;64, with different widths & spring mounting hardware for different cars. 625-, 8. squirrel, Nov 2, 2019 SHARE POST 3 Penetrator Member from SK CAN According to my friends httpswww. 5 gm rear end the. The casting number for a 1956 case should be 3707306 The casting number for a 1957-&39;61 non-posi center case should be 3725899 The casting number for a 1957-&39;61 posi center case is 3743833 The casting number for a 1962-&39;64 posi center case is 3789812 The above are all casting numbers for passenger cars. There is a code stamped onto the outside of the axle that you can use to decode what the stock gear ratio was - but it isn&39;t "sure-fire", because someone could have changed the gear ratio inside the case. 2-, and 8. 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 easiest way to identify the 8. 25 at 106mph 78 Firebird 350T350 3. The election (or revocation) must be made on an amended federal income tax return duly filed within 24 months of the unextended due date of the original. 90 wk yk gto only used with m-21 trans 1970 4. 42 diff. Oct 05, 2001 3969340NF GM75 CON3 K250, is the casting number on the pumpkin. These exact same center casting numbers were ALSO used on same era (&39;70-72) 12 bolts cast out of two other GM axle plants, but those axle . 5" and 11. You can typically find your RPO code on driver side door panel or glove box. Reported on several 1965 Chevelles but no image of one yet. 36 e e gto reg brakes 1964 3. Its range continued to include the luxury variants, Holden Berlina (VZ) and Holden Calais (VZ). Casting number 1254333 seems to be the answer. According to my research this is correct for a 1957 truck. 31 posi. 5 but I just don&39;t know who to believe. 23 l l gto hd metallic brakes 1964 3. Applications are similar to the big GM 14-bolt and the Dana 70. 55 ratio. 51 Gloss Black W Milled Red Inner XF Forged XFX-301 Wheel (Series XFX-301). 881 Posi AM 5-12-65 1965 missing cover 122. 5" Rear GM 9. 2-, and 8. Dave Last edited Aug 29, 2016. 23 posi 65 Mustang convert. Jump to Latest Follow 1 - 4 of 4 Posts. Heavy Duty Services. 5 inch, 10. 561- down)410409N The Chevy version used various tags to designate the ratio. A (08-19-18). GMC first rebadged the full-size Jimmy as the &x27;Yukon&x27; in 1991. I would appreciate any help figuring this out so I can move forward with this project. The 57 is unique onto itself, then 58 things changed again, but basically stayed the same through 64. Even if you don&39;t have overdrive. That sounds like some sort of casting number that won&x27;t tell you anything. 1970-1972 Chevrolet Monte Carlo. Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, . The greater the rate number, the stiffer the spring. Web. If it is an early 8. In actuality, the term 12-bolt is due to the 12 bolts holding the ring gear to the differential. comSA 71 SPN 520423 FMI 5 does anyone know how to fix this. 5 gm rear end the 8. On some tags, the first 2 digits won&39;t appear on the tag, but they must be used to identify the axle. 7 Production 2. 5Offset -76 Hub Size 78. 1966 Chevelle 3875745N. 7 Production 2. 1964-1972 Chevrolet Impala. Click on your year or scroll down 1970 1958 Back to Top 1959 Back to Top 1960 Back to Top 1961 Back to Top 1962-1964. 2021, Ch. This is also a reference to spring rate, since rate is a measure of how many pounds of force are required to compress a spring one inch. Web. 5" Gm differential that is. It is a new version of the ISX 15. I have not found any I. We do not send any unsolicited or wanted emails. All he knows at this point is that the rear axle assembly is a GM unit of some type and that it is possibly Chevrolet. Numbers are starting to fall in line for an original drive train. 23 k k gto reg brakes 1964 3. Those number might tell the better story. C-12-4, Can be March,12, 1964, 74 etc. Posts 16. 6 Styling Special (2010-) 2. The rear axle ratio, differential type, manufacturer, and build dateinformation is stamped on the right axle tube (as viewed from the front of the car) on . All he knows at this point is that the rear axle assembly is a GM unit of some type and that it is possibly Chevrolet. It was a j1939 comunication problem. Joined Mar 2012. 1964-1972 Chevrolet El Camino. 2 Rear Axle Common Applications 1964-1972 Chevrolet Bel Air 1964-1972 Chevrolet Biscayne 1967-1970 Chevrolet Camaro 1965-1971 Chevrolet Caprice 1964-1968 Chevrolet Chevy II 1964-1972 Chevrolet El Camino 1964-1972 Chevrolet Impala 1970-1972 Chevrolet Monte Carlo 1968-1972 Chevrolet Nomad 1964-1972 Chevrolet Nova. 25" IFS front end parts, to the large 11. . jarams donuts