pontiac rear end width chart

5" for small cars 5" - 6" for intermediate For the do-it-yourselfer, Fabcraft offers a full-color manual with excellent tech info on the differential. It may not display this or other websites correctly. 3.21 to 3.92. '70 Nova 0000000911 00000 n I ordering the axles from Bears Performance who kept thier promise of delivery in about a week. M&M CUSTOM. ; Home 2; Home 3; Home / / pontiac rear end width chart. The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . wagon pontiac plant 1975 2.73 ua va b sedan 1975 2.73 ya za b wagon 1975 2.73 pa pu f 1975 2.73 wl xl g . I have heard that a 1st gen Pontiac Firebird rear is wider, but I am not sure by how much. 0000006915 00000 n I am using a 62' Olds rear in my 61' Bel Air and it is 1" wider that the stock Bel Air rear. As a result, many tribute cars and gasser-inspired builds had to stray from correctness. Dick this in no way reflects upon your statement but you make an excelent point when you stated " I read enough times that". The 8.5-inch 10-bolt rearends have ten 3/4-inch hex head bolts with 7/16-20-inch left-hand thread bolts that hold the ring gear to the carrier. //-->. This information will change as further information and corrections become available. Like most american muscle cars of the Day the Pontiac GTO was a front engined rear wheel driven car. It has the 4.75" bolt pattern, and ratios are usually 3.55-3.73, but sometimes you'll find a 3.36. Below matches. Wheel Stud *. 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. '69 Javelin Six , '70 dodge 0 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. 1/4 Mile : 13.1 seconds. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. 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. I'm not sure of the xref '67 to '70 Mustang/Cougar 8 cyl. } Rear axle widths. some sources state that the 67 and latter are wider. Many aftermarket options exist with all of the appropriate mount points. . var u='http://50chevy.freeservers.com/cgi-bin/sitestats.gif?p='+escape(location.href)+';r='+escape(document.referrer)+';t='+t.getTime(); (painful to me while driving) I am pretty sure that it is the standard BOP 8.2, 10 bolt. My rear is the bolt in axles. Registered: 16 years ago. Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale. '72 Chrysler. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. 1939 engine numbers run 1915447 through 2697267. In 1957, the Pontiac and Oldsmobile designs were combined and improved upon, producing a brand new 9.3-inch differential. Rey Payumo of Kailua, Hawaii found this 1963 Chevrolet Impala packed with junk in a garage in Hayward, California. 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 It is a little better than the Camaro 8.2 10 bolt. 0000002277 00000 n For a variety of reasons, not the least of which is the current Gasser craze, Pontiac and Olds rearends are enjoying renewed popularity. The following tags will show a 4L80E transmission as an example. In head/2 per cylinder. If in doubt, consult one of our differential experts at (800)510-0950! You must log in or register to reply here. Factory Width. However, the 9.3-inch differential was saved from obsolescence by a Texas-based company called Fabcraft Metalworks and its owner, Brad Duerst. GM quit making the 9.3-inch in 1964. . Posts: 8. '71 Comet , '71- 72 Pinto, '39 -48 Chevrolet, '68 GTO Re: Rear end interchangability 1965 to 1967 IMPAL. It has been my experience that the 66 up axle is longer. 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. Advance Design Trucks seem to be using rear while a folding bench was standard for the rear passengers. <<3d7f7a4e8421a74f9b85ec848848f3a1>]>> SiteStats_3379(); I did a quick google search for 65 impala rear end, and 65-66 impala rear end came up a lot. 70 2wd 6 lug rear end 12 bolt Possible gear ratio's I just measured my 60' Pontiac and it is the same as my 62' Pontiac. A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. The 10-bolt was used in all the low performance applications. 0000003369 00000 n The dana pinion stands forward about 2" more than the 9 1/4, the driveshaft will need to be shortened accordingly. The current axle needs to be measured to verify width, because it plays an important part in determining what rim backspacing is necessary. The Borg-Warner HD rear end was dropped and replaced with the old 7.625 (7 5/8) inch rear end. Rear axle flange to flange is supposedly wider than the 68-72 AND the 78-88 GM A and G body cars. Its narrow front end with a plastic, wrapped-around bumper featured fog lights as an option. Forbes and various locations throughout the Web and Automotive Magazines. The simple cure when using wide tires with a stock-width rearend was to radius the fenders and let the tires hang out in the breeze. '70 Duster SKU: CE-GMG7887X. Shop Full Width; Shop With Sidebar; . Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. 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. Why not a Ford? According to published lists, the 55-64 Chevrolet rear end width is 60" from wheel mount surface to wheel mount surface. Six-cylinder truck engine block and head casting numbers. With its larger bearings, larger gears, and larger axles, the P/O 9.3 would fall somewhere between the Ford 9-inch and the Dana 60 in terms of strength. Ford continued cranking out the 9-inch in vast quantities well into the '80s. Vehicle. Bigger engines introduced in both Oldsmobiles and Pontiacs for 1959 prompted the second generation of these rearends with 31-spline axles, which were reportedly 22 percent stronger than the previously used 29-spline shafts. In the '50s and '60s the search for high-performance parts usually meant a trip to the wrecking yard to rob components, engines, out of big, powerful cars of the dayChryslers, Fords, Cadillacs, Olds, Pontiacs, and W-Chevys were all used. A: By casting numbers and date codes, along with other external characteristics, all of which are shown in the manual by Zach Davidson and Brad Duerst. A period gasser can be built by scrounging swap meets, salvage yards, and the Internet for many of the components necessary to complete a genuine example of one of the dominant race cars from the 1950s, '60s and '70s. 1967 Pontiac GTO - Wheel & Tire Sizes, PCD, Offset and Rims specs | Wheel-Size.com. var I=new Image(1,1); I.src=u; 0000006068 00000 n 5E med-duty 4-pinion. 0000002004 00000 n The 1967 GTO came in 3 speed Automatic and a 4 Speed manual. The Pontiac/Oldsmobile 9.3-inch is your axle. 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. Q: Why do Pontiac/Olds 9.3 parts cost more than those for a Ford 9-inch? It has an M-21 four speed and I am ready to upgrade the rear diff. Hoonigan Founder and Pro Rally Driver Ken Block Dead at 55, Worlds MOST Unusual Cars Ever Made, Found In One Warehouse, Lower the Bar ~ Perfectionism is Ruining the Automotive Hobby, 1971 GMC COE Fire Truck to Ramp Truck Car Hauler Build, Roadkills Best (and Worst) Drag Strip Tests, How To Choose the Correct Drag Racing Tire, 25 Tools and Gift Ideas Under $15 From Harbor Freight You Need, The Myths And Realities Of Carburetor Sizing, The Inaugural No Name Nationals Drag Race & Burnout Contest Coverage, Lawn Mower Racing ~ The Worlds CHEAPEST Motorsport, Quick and Easy DIY Headliner for Less Than $20, 1928 Ford Model A Coupe Goes From Yard Art To Driver, How To Turn Railroad Track into a DIY Homemade Anvil, New Docu-Series from Rat Rod Magazine ~ American Rust, Finishing a Late Friends Handmade 1956 Baby Buick Special Mini Car, Best 3-Ton Floor Jack? 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. On Gen1, the code is "hit" on the right side of the rear axle (passenger side) with the inscriptions facing the front of . for highway driving. These dimensions do not include brake drums and are measured from backing plate to backing plate. What I did is shown below in the photos. So why did the Ford 9-inch become the premier differential of modern day hot rodding? 0000005198 00000 n The later rear axle requires a wheel with between 5" and 5-1/4" of backspacing, while the earlier axles will only need a wheel with 4-1/2" to 4-3/4" backspacing. Items '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger 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. $1,825.00. startxref This number may be on the top, bottom, or either side of the axle shaft. 100 x 4.12. And yet, all too often, a beautiful gasser built today is sitting on top of a Ford 9-inch axle. 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. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Axle Shaft, Rear, 1541H Alloy, 28 Spline, 29.875 in. %PDF-1.4 % 0000002038 00000 n There is also a yellow stamp 10 22 which is the . . I'm sorry if I repeated what I've learned to accept as fact, but there are other reasons besides what I've read that have convinced me that '64/'65 housings are narrower than the '66/'67. (Dart/Duster) with V8&3/4 axle, Table taken from "How to Build The P/O rearend and parts were getting harder to find and there were more Ford 9-inchers being made every day. 0000012085 00000 n In searching the web I found the following links that have a massive of information on rear end widths and wanted to share. Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". 1940 engine numbers run 2697268 through 3665902. '62 Buick Skylark, '67 Chevrolet Six You're building a gasser. By 1965 GM replaced the 9.3 with a Spicer design using an 8.875-diameter ring gear that mounted the internals in the axle housing rather than a separate carrier. Add Width to The 55-57 Chevy car rear-end is almost a bolt in, the perches need to be relocated to the top of the housing though. Copyright 2023 Welcome To Rodplans! 0000009416 00000 n 0000001644 00000 n Model. 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. "SPECIAL" CARS - 1938 Pontiac Special six. Picture is from parts book. The new P/O 9.3-inch immediately found its way into hot rods and race cars. pontiac rear end decoder year ratio open posi model notes: . Your Nova should be the same as 67-69. 1957-58 are 29-spline and 1959-1964 are 31 spline. There is no point in mocking up the wheels to a width that in not commercially available or one that was never provided by the OEMs unless you are planning on spending a lot more money on a custom width housing and axles. My '64's measure 54.25". JavaScript is disabled. All but a few of the old factory limited-slips had been gathered up and beaten to death. Fabcraft can also supply an excellent manual that tells you everything you need to know about these rearends, along with instructions on overhauling them, or they'll refurbish a rearend for you. 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. June 5, 2022 Posted by: Category: Uncategorized Jeff Smith: When Chevrolet built the first Camaros in 1967, they were already in production of both 10- and 12-bolt rear-end housings. Learn more. Buick and Pontiac 10-bolt rear ends used flange-retained axles instead of the C-clip retained axles like those on Chevrolet rears. Pontiacs had 1.75-inch-wide drums in 1957-58 while Olds used 2-inch from 1959-on, both used 2-inch brakes. note 64 64 axle is same. Ironically the heavy-duty nature of the 9.3 worked against it and played a part in its demise. Richmond Gear calls the 57-64 Olds/Pontiac rear a GM 9.3" Axle (the ring gear is 9.3 inches). 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. 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. All housings have strong, tapered axle tubes, come in numerous widths, and sport a variety of suspension brackets. 62" 64-77 Chevelle, 73-76 Torino, 89 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. If you're running a blower, turbo, nitrous, etc you will probably want to step up to a larger rear like a 9" or 12 bolt. HVr0*u9$K;IG]&U&"x\s. ). Prices and availability are subject Hoonigan Founder and Pro Rally Driver Ken Block Dead at 55, Worlds MOST Unusual Cars Ever Made, Found In One Warehouse, Lower the Bar ~ Perfectionism is Ruining the Automotive Hobby, 1971 GMC COE Fire Truck to Ramp Truck Car Hauler Build, Roadkills Best (and Worst) Drag Strip Tests, How To Choose the Correct Drag Racing Tire, 25 Tools and Gift Ideas Under $15 From Harbor Freight You Need, The Myths And Realities Of Carburetor Sizing, The Inaugural No Name Nationals Drag Race & Burnout Contest Coverage, Lawn Mower Racing ~ The Worlds CHEAPEST Motorsport, Quick and Easy DIY Headliner for Less Than $20, 1928 Ford Model A Coupe Goes From Yard Art To Driver, How To Turn Railroad Track into a DIY Homemade Anvil, New Docu-Series from Rat Rod Magazine ~ American Rust, Finishing a Late Friends Handmade 1956 Baby Buick Special Mini Car, Best 3-Ton Floor Jack? Maverick 5 Lug 8", 49-51 Ford, 57-59 Ford 9", 58" 78-88 Mid a Custom Classic Truck" Peterson Publication; June or July 1999,