Mopar Rear Axle. Interest in vintage drag racing is now approaching a rapid boil. 70-81 4wd 6 lug reared Numerous e-mails and phone calls, stories of lost and found axles finally resulted in an e-mail from Speedway motors November 22nd apologizing for not handling this order in a timely manner and that a refund would be sent today. Pontiac Differential Codes Year Model Rear Ratio Tooth Count Std Code Posi Code 1970 Big Pontiac 2.56 41/16 UC VC 1970 Big Pontiac 2.73 41/15 UD VD 1970 Big Pontiac 2.93 41/14 UE VE 1970 Big Pontiac 3.23 42/13 UG VG 1970 Big Pontiac 3.42 41/12 UH VH 1970 Firebird 2.73 41/15 CRX CRY Many aftermarket options exist with all of the appropriate mount points. You can identify the B-O-P assemblies by the two reverse-scalloped sections of the differential cover located at the 9 and 3 o'clock positions. Q: Why do Pontiac/Olds 9.3 parts cost more than those for a Ford 9-inch? While the Ford 9-inch is the perceived benchmark of popular rearends today, in stock form the edge would go to the Pontiac/Olds. We provide how-to and technical articles, vehicle and build features and examples, plus calculators and lookups that will help you get your ride from dream to driver. If you would like to compare the fit with a couple of different widths build your wooden rear end for the narrower width and then add shims to the ends to change the width. A: Extremely strong! 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. 2/4-door sedan body type. Picture is from parts book. Estimated Lead Time: 5-Days. I used 5 long lag bolts to hold the end pieces of wood on which permitted me to add up to 1.5 of shims to each end. This method will work but the wheels are always trying to roll away and tip over making it very hard to check for clearance and be sure that your measurements are correct . Look at the RPO codes. It has been my experience that the 66 up axle is longer. Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars, STOCK CENTER TO CENTER SPRING PERCH DISTANCE, Original VehiclesRear Suspension Width (Flange to Flange), Donor Vehicles Front and RearSuspension Width (Flange to Flange), Items 60" 60's GMC and some Chevy's Dana 44 or Dana 60 with leaf springs 6 lug, Gear ratio's 3.21 to 3.92. You are using an out of date browser. '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger '69 Oldsmobile 88, '72 Chrysler The correct width for 59' & 60' is 63-1/4" I believe. Rear-end track width measurements of classic American cars including Chevrolet, Ford, and Mopar vehicle rear axle widths. Contributing information were Bob Welch, J Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale. The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . '67 Mustang V-8, '69 Firebird well i have 1 from f 150 82 b/plate 2 b/plate it is 58". Drag Racing 101 ~ Everything You Need to Know! Fabcraft also offered complete components for the differential, including all necessary bearings, seals, shims, limited-slip clutches, solid spacers, and crush sleeves, as well as beautifully refurbished OE parts. Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". Plywood pieces work well for shims. 100 x 4.12. <<3d7f7a4e8421a74f9b85ec848848f3a1>]>> I cut two axle flanges from a couple of short pieces of wood and then used 3/8 lag bolts to attach them to the longer center portion of the rear axle. Car, 67-69 Camaro, 64-67 Chevelle, Its role in drag racing was limited to primarily Stock, Super Stock, and Factory Experimental Fords. 62" 64-77 Chevelle, 73-76 Torino, 89 I came up with a cheap simple method to confirm the results of the measurement taken with the loose wheels. '72 Chrysler. Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars . "Hy-Tuff" axles are available for it from Moser and Mark Williams in any length (needed to . '67 Chevrolet big car A little history: In 1957, three important axles were introduced: Ford's 9-inch, Chrysler's 8.75-inch, and GM's 9.3-inch Hotchkiss-style axle for Pontiac and Oldsmobile. (painful to me while driving) I am pretty sure that it is the standard BOP 8.2, 10 bolt. http://www.jalopyjournal.com/forum/showthread.php?t=128884, http://www.jalopyjournal.com/forum/showthread.php?t=38805, Upstate New York, watching my New Yorker Rust, http://www.jalopyjournal.com/forum/showthread.php?t=128884&page=2, http://www.jalopyjournal.com/forum/showthread.php?p=1450810#post1450810, (You must log in or sign up to reply here. Rear axle widths. If you noticed the axles are missing you would be correct. Buy in monthly payments with Affirm on orders over $50. Cylinders. You can do this by multiplying by the gear ratio. with 10 bolt axle, "A" body During the production run a third-generation gear case was introduced, oddly enough with slightly smaller pinion bearings, which was probably a cost-cutting move. 59" 68-83 Corvette , 67-70 Mustang/Cougar/Fairlane, 60" 55-64 Chevy 18 21 1958-1970 Full size Chevy rear differential identification chart. Willwood Engineering. June 5, 2022 Posted by: Category: Uncategorized //-->. 4.24 out of 5 stars. For some time, only a small handful of ratios were available in new gears. The early Nova's 62-67 would be about 2" shorter. 66-69 axle does not include 64 65 . Terms of Service. Last Update: Feb. 24, 2023, 5:12 a.m. GM with 7.5 & 7.625 Ring Gears : 1985-1997. Ford continued cranking out the 9-inch in vast quantities well into the '80s. You bring the gumption. The End of an Era. They were robust, drop-out-style third members that offered the strength and serviceability racers required. 3.08. In 1958 a good thing got better when limited-slip differentials were offered. Compared to the Ford, the P/O parts were more expensive. The renewed interest in the P/O 9.3-inch generated high demand for any limited-slip units that were left. 2D reg-duty / 4D med-duty 4-pinion. I used 5" long lag bolts to hold the end pieces of wood on which permitted me to add up to 1.5" of shims to each end. There's absolutely no excuse to use the wrong differential in your gasser. The actual width that I made out of wood was based on both the measurements I had taken with the loose wheels and my research to determine what widths were available for purchase. "" "" ". According to published lists, the 55-64 Chevrolet rear end width is 60" from wheel mount surface to wheel mount surface. I've heard 'prolly torque-tube' from most that I've asked My friend's stock '41 Pontiac is open drive, so I would imagine that the '50 is as well. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. All but a few of the old factory limited-slips had been gathered up and beaten to death. They're tough, right? But the components should at least be grounded in the era. I would like most people place the wheels and tires under the car and use a tape measure to determine the distance from wheel flange to wheel flange. Copyright 2023 Welcome To Rodplans! ). Originally posted by SUNNYD @Mar 22 2007, 10:23 PM~7534589. The 1967 Firebird has the particularity to have a rear axle held by arms while in 1968 rear axle was hold only by the blades/spring of suspensions. Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale. Many Ford 9-inch parts are made offshore; they have smaller bearings and smaller diameter gears requiring less material. Pontiac/Olds rearends had been widely used full width under Gassers and other cars and even though lots of slingshot dragster pilots had their legs draped over a narrowed version, custom-width rearends were seldom seen in other applications and almost never under a street car. My 69 gto convert., purchased within the last year has a painful 2.56 rear gear. This number may be on the top, bottom, or either side of the axle shaft. Approximate rear end widths measured from backing plate to backing plate. '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger The current axle needs to be measured to verify width, because it plays an important part in determining what rim backspacing is necessary. Once the wheels and axle was centered under the car I was able to raise and lower the wheels with my floor jack to check for clearance at different ride height and suspension travel. Identified by casting number & number of cover bolts. Dont Be That Guy, Reversing Gears ~ Rescuing Ones Own Derelict 1967 Pontiac GTO, How To Paint a Lace Roof on the Cheap Using Grandmas Curtains, Exploring an Antique Junkyard in the Hills of West Virginia, Engine, Transmission, Chassis Swap Donor Vehicle Look-Up, Early Ford Beam Axle Identification and Dimensions, How To Box-In a Differential / Solid Axle Rear-End Housing, How To Install aLimited Slip/Posi Unit in a GM 10 Bolt 8.5 Rear-end, How To Install Ring and Pinion Gears in a Ford 8.8 Rear-End, How To Rebuild a GM 10 Bolt Chevy 8.5 Rear End, How To Select Proper Rear-End / Differential Gear Ratio, Popular Automatic Transmission Dimensions, Popular Automatic Transmission Identification Chart, Engine / Transmission / Chassis Donor Search, Project Cars and Part Donor Cars For Sale. Today finding a P/O 9.3 may take some searching and it's helpful to know what to look for. Axle Shaft, Rear, 1541H Alloy, 28 Spline, 29.875 in. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. My rear is the bolt in axles. It is now late November and I still do not have my axles. 0000000016 00000 n The Rochester Quadrajet carburetor was featured on the top spec GTO. 70 2wd 6 lug rear end 12 bolt Possible gear ratio's 3:08, 3:40, 3:73 70-81 4wd 6 lug reared 71- Newer 2wd trucks use a 5 on 5 lug pattern 71-76 Full Size Cars " "" "" ". '55 -57 Chevrolet, 68-69 Fair lane 6 or 8 cars 6" - 8" for large cars, '71 Colt It has the 4.75" bolt pattern, and ratios are usually 3.55-3.73, but sometimes you'll find a 3.36. Posts: 8. ZE reg-duty / 4E med-duty 4-pinion. Approximate rear end widths measured from backing Aftermarket support followed in the form of beefy axles, gears, spools, couplers, and Mickey Thompson's aluminum and magnesium centersections. 0000001291 00000 n We'll work to keep you motivated and informed and with industry news, product information and reviews, event coverage, and well-curated articles and stories intended to inspire and educate. I have heard that a 1st gen Pontiac Firebird rear is wider, but I am not sure by how much. Floor jack permits you to raise and lower wheels to check for clearance. The T/A 6.6 was available for most of the model year, but once the supply of stockpiled 400s was exhausted, it signaled the end of the big Pontiac V-8. July 30, 2004 11:23PM. '71 Comet Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. Mickey Thompson even produced aftermarket Olds and Pontiac magnesium gear cases that were frequently used in dragsters. '70 Duster And yet, all too often, a beautiful gasser built today is sitting on top of a Ford 9-inch axle. Approximate rear end widths measured from backing plate to backing plate. Accurate Differential Identification is the first and most important step in your differential repair, upgrade or overhaul project. Someone may correct me, but as I recall 1959 was the first year for the "Wide Track" Pontiac. '74 Valiant, '57 Ford The 8.75-inch had slightly larger, 30-spline axleshafts compared to the P/O's 29-spline shafts; but by 1959, big 31-spline factory shafts were standard, and aftermarket shafts for the 9.3-inch eliminated any supposed shortcomings. The following is a general list of rear ends and their dimensions to help narrow the search for a possible candidate to replace the torque tube rear end or just get a better set of gears for highway driving. According to an old article, Inside '64 -- '72 A-Bodies, (Car Craft Magazine), 1967 was a transition year in that A-body cars might have a 1964-66 style rear end, a 1968-72 rear end (which is wider, and commonly available), or a "hybrid" rear end, which will have the 60.5-inch width, but with the early spring mounting pad and trailing arm . Currie Centurion Housing - Classic notchback looks in a new, high-strength, American-made housing, that features 3-inch diameter axle tubes, and CNC machined face flange, for a flat leak-free . 66-69 axle does not include 64 65 . GU6 - 3.42's Standard manual trans gear ratio. '66 Falcon, '69 Chevrolet The housing came in a couple of weeks but without the axles. also note on the A4's (auto's) shifter console if the gear selector for 1 is missing. I'm not sure of the 71-76 Full Size Cars " trailer Wheel- Size.com The world's largest wheel fitment database. The GM 8.2" axle is available in two configurations: The standard GM 8.2" version features an 8.2" diameter ring gear with 28 spline axle shafts that are held in place using c-clips. i've seen that link about a hundred times now and it's kind of funny how the 73-77 GM A-body is not included. The other drawback is that you can only check for clearance at the height the jack stands are set to. The dana pinion stands forward about 2" more than the 9 1/4, the driveshaft will need to be shortened accordingly. of extensive information was contributed by R. Welch: Original Vehicles startxref The1971-'72 Buick GS/Skylark and Olds Cutlass A-body 8.5 10 bolt did not have C-clip axles. No one is making new 31-spline side gears at this time, which is not good. Approximate rear end widths measured from backing plate to backing plate. GM quit making the 9.3-inch in 1964. used a 3.21 Dana 44 used a standard chevy You must log in or register to reply here. '69 Dodge Van, '71 Torino What I did is shown below in the photos. Diagram. Post: rear end width chart (Topic#173541) greg pharr Contributor Posts: 897 Loc: North Mississippi Reg: 07-09-03. I did a quick google search for 65 impala rear end, and 65-66 impala rear end came up a lot. Lincoln Versailles, Regal with 10 bolt axle, S-10 P.U., 65-67 Nova. For 1966-1970 Plymouth and Dodge B-bodies there were three basic rear end assemblies that were available: the 8, the 8, and the 9 Dana 60. . S10. 0000002004 00000 n Several features are common to most gassers. A: Ford 9-inch is like the small-block Chevy of rearends. '69 Cougar, '71 -73 Nova @`AWG^8J>4j|^Vk@oXq7@@/9ep 68-74 Nova, 71-73 Mustang/Cougar, 84-95 Corvette, 60-61" 64-69 1/2 ton 2wd Chevy/ Some GMC Product By Category; Products By SKU/ID; . In their day Pontiac and Olds rearends had a well-deserved reputation for toughness and reliability, that's why they were found under so many hot rods on the dragstrip and the street. I just measured my 60' Pontiac and it is the same as my 62' Pontiac. 53.6 -- 1971-'77 Chevy Vega, 1973-'77 Pontiac Astre, 1975-'80 Chevy Monza, Buick Skyhawk, Olds Starfire, 1976-'80 Pontiac Sunbird 112.0 coupe; 116.0 sedan,wagon, 61.5, 60.7 -- 1973-'77 Oldsmobile Cutlass, 442