They were tough with 9.3-inch ring gears, big pinion shafts, and large-diameter bearings and tough axles. 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. Billet-steel yokes and carrier caps could be added to make the 9.3-inch nearly bomb-proof. This reduced weight and eliminated the stock suspension, producing a spacious engine bay that eagerly accepted the chosen powerplant. . Wheel- Size.com The world's largest wheel fitment database. sized GM Car, Malibu/Monte Carlo (82 up Metric Studs), 80 Granada & This 1955 Chevrolet 3100 Step Side Pickup Truck was built by the Hot Rod Factory, Minnesotas premier hot rod shop and muscle car restoration facility. Compared to the Ford, the P/O parts were more expensive. Model. ). 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. Approximate rear end widths measured from backing plate to backing plate. Length, GM 8.2 in. For some time, only a small handful of ratios were available in new gears. There have been non C-clip rearends found in Chevelle wagons, and some El Caminos through at least 1974. 0000000716 00000 n The current axle needs to be measured to verify width, because it plays an important part in determining what rim backspacing is necessary. Chevy 10 Bolt Rear End Widths. In 1957, the Pontiac and Oldsmobile designs were combined and improved upon, producing a brand new 9.3-inch differential. Car, 67-69 Camaro, 64-67 Chevelle, 1956 and back have 10-spline axles. 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. 0000002038 00000 n 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. They were robust, drop-out-style third members that offered the strength and serviceability racers required. My '64's measure 54.25". It'll help you sniff out the right parts and will walk you through building the differential for your gasser project. But when it came to rearends, the overwhelming favorites were those our of '57-64 Pontiacs and Oldsmobiles. 5E med-duty 4-pinion. 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. Like most american muscle cars of the Day the Pontiac GTO was a front engined rear wheel driven car. The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . '62 Buick Skylark, '67 Chevrolet Six The power is transmitted to the road by the rear . Diagram. 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. '74 Valiant, '57 Ford <<3d7f7a4e8421a74f9b85ec848848f3a1>]>> '72 Cougar SKU: CE-GMG7887X. So why did the Ford 9-inch become the premier differential of modern day hot rodding? Find 1967 PONTIAC GTO Differential & Rear-End Components and get Free Shipping on Orders Over $99 at Summit Racing! '72 Cricket '73 Ventura, '65 Ram American Jeremy. For a variety of reasons, not the least of which is the current Gasser craze, Pontiac and Olds rearends are enjoying renewed popularity. of torque to the pinion gear and the gear ratio of the ring-and-pinion is say 4.12:1, the output torque is 412 ft./lbs. Popular Tools & Look-Ups. '71 - 72 Pinto All Rights Reserved. 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. candidate to replace the torque tube rear end or just get a better set of gears '65 Cadillac, '66 Buick Wildcat Rear End Widths - - Back - - Home > Specs > Rear End Widths : Representative for comparison purposes only. You bring the gumption. Wheel Stud *. find the 1/2 ton size yoke on a dana 60. 1967 Pontiac GTO - Wheel & Tire Sizes, PCD, Offset and Rims specs | Wheel-Size.com. The1971-'72 Buick GS/Skylark and Olds Cutlass A-body 8.5 10 bolt did not have C-clip axles. 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. Detroit gear & axle : AB : 3.36 : No : Powerglide : Detroit gear & axle : AC : 4.11 : No : 3 speed, O.D . It is now late November and I still do not have my axles. Contributing information were Bob Welch, J Forbes and various locations throughout the Web and Automotive Magazines. I've read enough times that '64/'65 are 54.25" and '66's are an inch wider that I believe it. Suspension Width (Flange to Flange), Ford Mustang II/Pinto & M&M CUSTOM. 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. Drag Racing 101 ~ Everything You Need to Know! As a result, many tribute cars and gasser-inspired builds had to stray from correctness. some sources state that the 67 and latter are wider. 0000001644 00000 n Ford Mustang Complete 9" Rear End Packages, GM G-body 78-87 Complete 9" Rear End Package, GM Chevy S10 82-04 Complete 9" Rear End Package, GM Tri 5 55-57 Chevy Complete 9" Rear End Package, GM X-Body Nova Complete Rear End Packages, Axle Bearings, Retainer Plates, & Wheel Studs, Bearings, Differential Parts, Seals, & Hardware, Master Cylinders, Caliper Kits, and Parts. 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. 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 Apply Rust Encapsulator Plus to a Rusty Rear End, How To Box-In a Differential / Solid Axle Rear-End Housing, How To Select Proper Rear-End / Differential Gear Ratio, Wheelbase Measurements for Popular Classic Cars, 1955 Chevrolet 3100 Step Side Pickup Truck Build, How To Cut Your Long Bed to a Short Bed in a Weekend, Engine / Transmission / Chassis Donor Search, Project Cars and Part Donor Cars For Sale. 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. Q: Why do Pontiac/Olds 9.3 parts cost more than those for a Ford 9-inch? 3:08, 3:40, 3:73 '67 Mustang V-8, '69 Firebird Drag Racing 101 ~ Everything You Need to Know! NFTs Simplified > Uncategorized > pontiac rear end width chart. Rear Suspension Width (Flange to Flange), Donor Vehicles Front and Rear Floor jack permits you to raise and lower wheels to check for clearance. Terms of Service. July 30, 2004 11:23PM. may be different than pictured. Approximate rear end widths measured from backing 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 '69 Nova 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 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 . Dick this in no way reflects upon your statement but you make an excelent point when you stated " I read enough times that". to change without notice. This posi has 4 pinion gears, which makes it about 2 times as strong as the Chevy Eaton posi. Calculating the torque multiplication that your axle gears provide is quite easy. SiteStats_3379(); Prices and availability are subject var I=new Image(1,1); I.src=u; I guess 66 will work too, but I don't have any way to verify this, nor any more information for you. 0000006068 00000 n B. Buick/Olds/Pontiac axles are typically retained with bearings. The other drawback is that you can only check for clearance at the height the jack stands are set to. may be different than pictured. 0000006915 00000 n "Hy-Tuff" axles are available for it from Moser and Mark Williams in any length (needed to . Its narrow front end with a plastic, wrapped-around bumper featured fog lights as an option. We carry everything from the 7.25" IFS front end parts, to the large 11.5" rear end parts for 1-ton trucks.We make it easy to verify your exact rear end by providing specs and year, make, and model applications for . manufactured by Pontiac in United States. A: Starting in 1937 Pontiac and Oldsmobile rearend designs slowly began to converge, to the point that in 1957 all major components were virtually interchangeable, with the exception of some brake components, suspension attachments, and axle housing/axle widths. The Rochester Quadrajet carburetor was featured on the top spec GTO. Good third-member cores are also relatively easy to come by, as many are now being saved from recyclers by fellow enthusiasts. 0000008567 00000 n Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Six-cylinder truck engine block and head casting numbers. Brand new gears in ratios from 3.42 through 5.38 could be purchased and mounted on a new forged-steel spool with 31- or 35-spline axles. 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. Several features are common to most gassers. Correct two piece design posi unit, exact for only 67 - 69 Firebird 10 bolt 8.2 rears. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines. 1957-58 are 29-spline and 1959-1964 are 31 spline. 1985 to 1989: 7.625 inch ring gear, 26 spline axle. The two makes used very similar differentials through the mid-'40s and into the '50s. '70 Nova Today finding a P/O 9.3 may take some searching and it's helpful to know what to look for. I ordering the axles from Bears Performance who kept thier promise of delivery in about a week. B-O-P axles also have identifying grooves traveling along each side of . These dimensions do not include brake drums and are measured from backing plate to backing plate. 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. Stop listening to your street rodder buddy and back away from the 9-inch. Cars from all the traditional drag racing classes are being built and/or restored, but among the most popular of these period-correct builds are the cars riding high on solid front axles and sporting fenderwell headers: gassers. 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. And even though new internals were available from Fabcraft, the carriers were simply becoming too difficult to find. If you're building a period-correct car, especially a Gasser, they are undoubtedly the perfect rearend for today. Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars . 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. '70's Ford Grenada 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. '66-67 Chevrolet Big Car, '72 Charger Rear axle flange to flange is supposedly wider than the 68-72 AND the 78-88 GM A and G body cars. 0000004229 00000 n 40/13. Once I had determined the desired width with the loose wheels and tape measure I constructed a wood rear end out of a 2x4. HVr0*u9$K;IG]&U&"x\s. For instance, if both the engine and transmission deliver up to 100 ft./lbs. i know in 1956 the pontiac dual range hydra-matic got a different driveshaft yoke. Hot Rod Blueprints, Drawings and Tech Tips For The Hot Rod Enthusiast!. 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[ July 26, 2022 ] Reversing Gears ~ Rescuing One's Own Derelict 1967 Pontiac GTO Builds and Examples [ July 24, 2022 ] . Mavericks 8", All '75-77 6's & 8's Fits 41-52 Olds, 50-55 Pontiac : 1310 to 1330: MORE INFO: 3.219 x 1.062: Outside Snap Rings: Converts To: 3.625 x 1.062: Outside Snap Rings :
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pontiac rear end width chart