In 1957, the Pontiac and Oldsmobile designs were combined and improved upon, producing a brand new 9.3-inch differential. Buy in monthly payments with Affirm on orders over $50. While not as strong as a race-dedicated spool, the 31-spline Trophy Track carries a potent arsenal, including six 9310 alloy gears and twin cross-shafts, all of which are dimensionally larger and stronger than anything offered previously. On early street rods it wasn't unusual for the rear of the car to be jacked up so wider than stock tires could protrude several inches past the fenders, but then styles changed and the need for a narrower rearend that was reasonably strong led many hot rodders to the '57 Ford 9-inch, particularly those under wagons and Rancheros as they were the narrowest. You're building a gasser. endstream endobj 29 0 obj<>stream All housings have strong, tapered axle tubes, come in numerous widths, and sport a variety of suspension brackets. For the do-it-yourselfer, Fabcraft offers a full-color manual with excellent tech info on the differential. list of rear ends and their dimensions to help narrow the search for a possible /** * Error Protection API: WP_Paused_Extensions_Storage class * * @package * @since 5.2.0 */ /** * Core class used for storing paused extensions. Shop Full Width; Shop With Sidebar; . 100 x 4.12. The 1967 GTO came in 3 speed Automatic and a 4 Speed manual. '73 Ventura, '65 Ram American The Trophy Track's strengthened bearing hubs even use larger-than-stock bearings, the same ones found on spools. My rear is the bolt in axles. J.T. '67 Chevrolet big car May 7, 2009. Compared to the Ford, the P/O parts were more expensive. For instance, if both the engine and transmission deliver up to 100 ft./lbs. Posts: 8. I've read enough times that '64/'65 are 54.25" and '66's are an inch wider that I believe it. 0000003369 00000 n '72 Cougar, '74 Pontiac, '49 Plymouth, '61 Chevrolet Impala 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 4.24 out of 5 stars. 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. hi don, there is no major difference in the pontiac differential from 1949 to 1956 other than rear brake related parts. 1982-1997. The total width of the Chevy II rear end is 58 inches and the total width of a '67 to '69 Camaro rear end is 60 inches. Re: Rear end interchangability 1965 to 1967 IMPAL. manufactured by Pontiac in United States. note 64 64 axle is same. 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. Correct two piece design posi unit, exact for only 67 - 69 Firebird 10 bolt 8.2 rears. with 10 bolt axle, "A" body In 1958 a good thing got better when limited-slip differentials were offered. * Ring #s GM 40 13 == 67 - 8 - A. Plywood pieces work well for shims. Other changes were made to the limited-slip carrier, but strength was not adversely affected. Mopar Rear Axle. (Rear Wheel Drive) +20 offset. The Olds and Pontiac both used the same center section. '41 -48 Ford, '68-72 Chevelle 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. candidate to replace the torque tube rear end or just get a better set of gears GM 7.75" (Australian - Some 3rd Gen Camaro/Firebirds) GM 8.0" - Rear - Late Model Midsize Truck Ring Gear Diameter: 7.75" Ring Gear Diameter: 8.0" Pinion Diameter / Spline: 27 Pinion Diameter / Spline: 1.781" / 27 Ring Gear Bolts: (8) Ring Gear Bolts: (10) 7/16"x20 LH Cover Bolts: 9 Cover Bolts: 10 Carrier Breaks: 2.77 / 3.27 Carrier Breaks: None may be different than pictured. compensate for drums as follows: 4" - This ratio is 3.08, perfect for cruisin. 1/4 Mile : 13.1 seconds. SiteStats_3379(); . GU3 - 3.08's V6 gear ratio. "" "" ". You must log in or register to reply here. The Dana rear end is a bolt in swap for the both the 8 3/8 and the 9 1/4, all rear ends can be had with the same size u joint yokes, vans are good place to. pontiac rear end width chart . 3.08. Hot Rod Blueprints, Drawings and Tech Tips For The Hot Rod Enthusiast!. Drag Racing 101 ~ Everything You Need to Know! GMC V-6 Several features are common to most gassers. The P/O rearend and parts were getting harder to find and there were more Ford 9-inchers being made every day. 18 0 obj<> endobj @`AWG^8J>4j|^Vk@oXq7@@/9ep Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. If it has the original Borg Warner posi then it is stronger than the Chevy 10 bolt. M&M CUSTOM. The Pontiac/Oldsmobile 9.3-inch is your axle. My 69 gto convert., purchased within the last year has a painful 2.56 rear gear. Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale. 71- Newer 2wd trucks use a 5 on 5 lug pattern User Info. 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. GMC V-6 used a 3.21 Dana 44 used a standard chevy 1310 yoke, Dana 60 used the heavy duty yoke which takes the larger 1350 yoke. Real World Hagerty Collector Car Insurance Claim Experience, How To Be Prepared For A Dyno Session And Not Waste Your Money, Holey Goat Father/Son Texas Road Trip 5 Days, and 2000+ Miles, Are You Killing The Hot Rod Community? Wheel Stud *. trailer The Borg-Warner HD rear end was dropped and replaced with the old 7.625 (7 5/8) inch rear end. 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. 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. 0000002038 00000 n The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. Its pretty easy to find a good one if you are in an area with a few junkyards. Under the hood, Pontiac installed a 2.5 . RWD (rear-wheel drive), automatic 4-speed gearbox. Six-cylinder truck engine block and head casting numbers. Ford. L = Low - Zero to Negative Offset, Offset typically RWD (Rear . Will only work with bolt in style axles. var I=new Image(1,1); I.src=u; 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 . 71-76 Full Size Cars " NFTs Simplified > Uncategorized > pontiac rear end width chart. 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. 70-81 4wd 6 lug reared Newest [ January 23, 2023 ] Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory Roadkill Powersports Quality and service was excellent. 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 . Identified by casting number & number of cover bolts. '70 Duster , '71-77 Maverick The now famous Ford 9-inch, with it's unique, straddle mounted pinion, offered great strength for its weight, but even the heavy-duty nodular-iron version suffered from weaknesses that the 9.3-inch did not. Roadkill Customs has evolved from local hot rod shop to online how-to magazine for budget-minded do-it-yourself hot rod builders and enthusiasts. Yes the axles were special in that I wanted to use a 28 spline center section already had rather than buy a new 3rd member to suit the 31 spline axles that Speedway stocked. '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger I just measured my 60' Pontiac and it is the same as my 62' Pontiac. So what we are left with is this: A fully capable, period-correct, brute of a differential with complete aftermarket support. Because OE components were still widely used in racing circles, the 9-inch gained traction as a viable alternative, superior to the newer, cheapened, integral-style axles using C-clips and flimsy internals. '72 Chrysler. JavaScript is disabled. '67 Mustang Six , '68 AMX ?|-Zce14^nF%67( }fSRaQfqX?|{8{>? VX5EX=b :"-'k>.VbyV^-nWxv-WgUtpo>sMhlI4ZV<4+s>|2k>\x{7M^^x. Outside Width: Year: Model: 56.50: 1969-1977: Maverick 8" 56.50: 1990-1992: Ford Ranger 8.8" 56.75: 1995-2003: Ford Explorer 8.8" Narrowed w/2 short side axles: 57.00: 1974-1978: Mustang II 8" 57.25: 1957-1959: Ford, Ranchero . Advance Design Trucks seem to be using rear The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . Beginning with a new line of U.S.-made gearsets in desirable ratios, Fabcraft rekindled the flickering flame of the 9.3-inch. I am using a 62' Olds rear in my 61' Bel Air and it is 1" wider that the stock Bel Air rear. Plywood pieces work well for shims. I placed the order with Speedway motors in late July for my rear end housing and Currie axles. There is also a yellow stamp 10 22 which is the . I believe the width, outside axle flange to outside axle flange, is 64 inches. 0000000016 00000 n 1957-58 are 29-spline and 1959-1964 are 31 spline. 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. 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. There's absolutely no excuse to use the wrong differential in your gasser. i know in 1956 the pontiac dual range hydra-matic got a different driveshaft yoke.
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