The '70 to '81 Camaro rear end is 61 inches. '67 Mustang Six , '68 AMX 57" 71-74 V-8 3:08, 3:40, 3:73 Vehicles with Similar . 2/4-door sedan body type. '73 Ventura, '73 Mustang, '36 Plymouth, '54-56 Ford Pickup "Hy-Tuff" axles are available for it from Moser and Mark Williams in any length (needed to . '72-73 Mazda, '28-40 Ford , '57 - 59 Ford As the popularity of the Ford 9-inch increased the P/O 9.3 began to fade from the scene. Another factor that made these rearends popular was the wide selection of factory gear ratios available, 2.56:1 through 4.30:1 while even lower drag racing cogs were available from aftermarket suppliers. The non C-clip 8.5" 10 bolt, type "C" rearend was used in some 1969-'72 Pontiac GP and 1970-'72 Monte Carlo. This engine produces a maximum power of 142 PS (140 bhp - 104 kW) at 5200 rpm and a maximum torque of 230.0 Nm (169 lb.ft) at 5200 rpm. L = Low - Zero to Negative Offset, Offset typically RWD (Rear . With a maximum top speed of 112 mph (180 km/h), a curb weight of 2672 lbs (1212 kgs), the Fiero GT has a naturally-aspirated V 6 cylinder engine, Petrol motor. The high-volume production runs of Ford-9 inch components allow them to be relatively inexpensive. Ironically the heavy-duty nature of the 9.3 worked against it and played a part in its demise. 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. '67 Chevrolet big car The following information is provided to help you identify the differential you are working on. '70 Duster , '71-77 Maverick I have heard that a 1st gen Pontiac Firebird rear is wider, but I am not sure by how much. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass. Your Nova should be the same as 67-69. Several features are common to most gassers. Pontiac/Olds 9.3 parts are manufactured in the United States and are made in smaller custom production runs using high-quality alloys and the best materials available. Trans Am. For a variety of reasons, not the least of which is the current Gasser craze, Pontiac and Olds rearends are enjoying renewed popularity. 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? 1940 engine numbers run 2697268 through 3665902. '67 Mustang V-8, '69 Firebird Copyright 2023 Welcome To Rodplans! 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Thanks to the efforts of the Fabcraft Metalworks crew all the parts necessary to rebuild one are available along with a selection of improved components and special tools to make working on them easier. The power is transmitted to the road by the rear . This assembly used an 8.2-inch ring gear diameter and 28-spline axles for Camaros, Chevelles, Impalas and even the early Chevy II's. '67 Chevrolet Six The 10-bolt was used in all the low performance applications. note 64 64 axle is same. Posts: 8. I'm running the wider blazer rear end . Good third-member cores are also relatively easy to come by, as many are now being saved from recyclers by fellow enthusiasts. 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. startxref In head/2 per cylinder. But the components should at least be grounded in the era. 18 21 * Pinion #s GM 40 13 == 67 K D. It has been my experience that the 66 up axle is longer. Ford continued cranking out the 9-inch in vast quantities well into the '80s. 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. pontiac rear end decoder year ratio open posi model notes: . '66 Falcon, '69 Chevrolet 59" 68-83 Corvette , 67-70 Mustang/Cougar/Fairlane, 60" 55-64 Chevy 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. Additionally, it can be a relatively affordable way to enjoy a day at the track. 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. '72 Charger '70 Nova 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. A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. All Rights Reserved. Building an example that truly reflects what was around back then takes a certain passion for correctness. also note on the A4's (auto's) shifter console if the gear selector for 1 is missing. [ July 26, 2022 ] Reversing Gears ~ Rescuing One's Own Derelict 1967 Pontiac GTO Builds and Examples [ July 24, 2022 ] . Quality and service was excellent. . The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . 3.08. You bring the gumption. 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. The early Nova's 62-67 would be about 2" shorter. 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. In 1958 a good thing got better when limited-slip differentials were offered. The Firebird rear end would have been a BOP 8.2 10 bolt. In searching the web I found the following links that have a massive of information on rear end widths and wanted to share. Privacy Policy. Stop listening to your street rodder buddy and back away from the 9-inch. 455 ho only(c-type axle) 12 bolt 1970 3.36 cok col fb 1970 3.55 cow cox fb 1970 3.55 wv xv gto 455 ho only(c-type axle) 12 . Some of the most frequently asked questions regarding the Pontiac/Oldsmobile 9.3-inch rearend: A: Fabcraft Metalworks provides virtually every component for the Pontiac/Oldsmobile 9.3-inch rearend. the wider housing is not 1" closer to 3/4 . 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. The Rochester Quadrajet carburetor was featured on the top spec GTO. Vehicle. Look at the RPO codes. @`AWG^8J>4j|^Vk@oXq7@@/9ep Maverick 5 Lug 8", 49-51 Ford, 57-59 Ford 9", 58" 78-88 Mid endstream endobj 29 0 obj<>stream Axle Images: Axle Details. 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. Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. . '70 Dodge, '71-77 Maverick Rear-end track width measurements of classic American cars including Chevrolet, Ford, and Mopar vehicle rear axle widths. GM 10-bolt rear ends have four basic ratio choices: 2.73, 3.08, 3.42, and 3.73 . 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. Shop Full Width; Shop With Sidebar; . I have in the past struggled to measure the car for the correct rear end width to get the wheels and tires to fit correctly for both appearance and to avoid contact with the fenders, frame and suspension. I placed the order with Speedway motors in late July for my rear end housing and Currie axles. 5E med-duty 4-pinion. } 41/14. For die-hard purists, it soon became a difficult proposition to build a worthy P/O 9.3-inch as aftermarket support subsided and the supply of virgin factory parts withered. Prices and availability are subject 0000002038 00000 n stock from flange to flange it is 60 ". Beginning with a new line of U.S.-made gearsets in desirable ratios, Fabcraft rekindled the flickering flame of the 9.3-inch. 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. Information provided by:Joe GarciaThe Resto Rod Shop. 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 . '69 Firebird GU5 - 3.23's Optional auto trans gear ratio. Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale. but the body with is 1" wider on 66-67. "+j)(4 T "Hd&6F T:R%xA+R>6^yyp0}Zc9^):(cdf_rKr2zB,ywV}w0*lkxwM y icR,2*G{>K\"|>XWAIRYQ_dKx}wt}_=/3=)>fQaa-# C+|prj~%ox$LpKaGPG&T`o. It's not to the same level as a concours-correct restoration; no judge will deduct points for an incorrect paint code. GU6 - 3.42's Standard manual trans gear ratio. Contributing information were Bob Welch, J Forbes and various locations throughout the Web and Automotive Magazines. But it's been so long I can't be certain. ). 0000000911 00000 n These smaller volumes and domestic content result in slightly higher prices. Very hard to find set, being as this is version is not being reproduced. All correct GM codes and part numbers. manufactured by Pontiac in United States. 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. xref 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. 0000009416 00000 n '55 -57 Chevrolet, 68-69 Fair lane 6 or 8 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. GU3 - 3.08's V6 gear ratio. May 7, 2009. var t=new Date(); Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars . '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 Terms of Service. 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. 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. 0000015097 00000 n Contributing information were Bob Welch, J 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. It may not display this or other websites correctly. I'm not sure of the '69 Javelin Six , '70 dodge GU2 - 2.73's Standard auto trans gear ratio. xb```"~> !%1#XY} P A1@G7L/^nkX,i{j^vL@l ` n 0000007740 00000 n 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. 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. 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. They were tough with 9.3-inch ring gears, big pinion shafts, and large-diameter bearings and tough axles. What I did is shown below in the photos. $5 Off Your $100 Mobile App Purchase . For some time, only a small handful of ratios were available in new gears. According to an old article, Inside '64 -- '72 A-Bodies, (Car Craft Magazine), 1967 was a transition year in that A-body cars might have a 1964-66 style rear end, a 1968-72 rear end (which is wider, and commonly available), or a "hybrid" rear end, which will have the 60.5-inch width, but with the early spring mounting pad and trailing arm . Ford Mustang Complete 9" Rear End Packages, GM G-body 78-87 Complete 9" Rear End Package, GM Chevy S10 82-04 Complete 9" Rear End Package, GM Tri 5 55-57 Chevy Complete 9" Rear End Package, GM X-Body Nova Complete Rear End Packages, Axle Bearings, Retainer Plates, & Wheel Studs, Bearings, Differential Parts, Seals, & Hardware, Master Cylinders, Caliper Kits, and Parts. Valves. Both of these are semi-floating axles. Items 0000006915 00000 n to change without notice. The current axle needs to be measured to verify width, because it plays an important part in determining what rim backspacing is necessary. Building a gasser is a satisfying way to blast down the track, turn some heads, and salute the good old days of racing. I did a quick google search for 65 impala rear end, and 65-66 impala rear end came up a lot. pontiac rear end width chart . 0000005198 00000 n CK 15/35, S10, RV. 6>"FlJz^l,*4&V0afw .a@z"PXdj}o`2/ OQs=`&qf aDK|/U32.)0i%q~P"BaLw.Y@`uwy#Do~vt*o~@$y-KZe]X3q'WWb2y)0`61"4@Q*`6k RPf\`H#@ ^M8-|&YxO-t According to published lists, the 55-64 Chevrolet rear end width is 60" from wheel mount surface to wheel mount surface. The intake valve size increased to 2.11" and the exhaust valve increased to 1.77"in size from the previous model. Rear-end questions. with 10 bolt axle, "A" body The 1' wider that was stated in paul/chuck 's book may have been miss spoke. Newest [ January 23, 2023 ] Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory Roadkill Powersports To say I was disappointed by the service provided by this company would be an understatement. Picture is from parts book. '71 Comet , '71- 72 Pinto, '39 -48 Chevrolet, '68 GTO ZE reg-duty / 4E med-duty 4-pinion. 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. jack39rdstr # 169783 04/02/10 02:03 PM. You are using an out of date browser. 71-76 Full Size Cars " 1967 Pontiac GTO - Wheel & Tire Sizes, PCD, Offset and Rims specs | Wheel-Size.com. 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. Displays PONTIAC bolt patterns, wheel sizes and dimensions by model or view all matching vehicles that will swap or interchange with PONTIAC wheels. Other changes were made to the limited-slip carrier, but strength was not adversely affected. Compared to the Ford, the P/O parts were more expensive. 70 2wd 6 lug rear end 12 bolt Possible gear ratio's Approximate rear end widths measured from backing plate to backing plate. The dana pinion stands forward about 2" more than the 9 1/4, the driveshaft will need to be shortened accordingly. '65 Cadillac, '66 Buick Wildcat HVr0*u9$K;IG]&U&"x\s. Originally posted by SUNNYD @Mar 22 2007, 10:23 PM~7534589. Wilwood Engineering designs and manufactures high-performance disc brake systems. The 78-88 mid size GM cars use a 7.5" 10 bolt, which is about 58/5" wide. for highway driving. Diagram. 3.21 to 3.92. I am using a 62' Olds rear in my 61' Bel Air and it is 1" wider that the stock Bel Air rear. A solid front axle was found under the front of nearly every gasser. Post: rear end width chart (Topic#173541) greg pharr Contributor Posts: 897 Loc: North Mississippi Reg: 07-09-03. the versailles / granada rear ends from flange to flange is 58.5". A: They came in all fullsize Pontiacs and Oldsmobiles from 1957-64. M&M CUSTOM. Check here to see if your engine is correct for your year truck. So what we are left with is this: A fully capable, period-correct, brute of a differential with complete aftermarket support. 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. Approximate rear end widths measured from backing plate to backing plate. * Ring #s GM 40 13 == 67 - 8 - A. AXLE DIFF 4X4 FRONT DIFF PARTS AXLE DIFF REAR END PARTS . Rear End Widths - - Back - - Home > Specs > Rear End Widths : Representative for comparison purposes only. '73 Ventura, '65 Ram American 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 . find the 1/2 ton size yoke on a dana 60. Grand Prix. That being said, if you have at least 2" of clearance (and preferably more) between your stock tire/wheel combo and the frame or exhaust pipe, whichever is closest to the tire, then a 56" rear end width could possibly fit. All but a few of the old factory limited-slips had been gathered up and beaten to death. Task Force width ranges at this time. Advance Design Trucks seem to be using rear These rearends were the Hotchkiss style, which means the ring-and-pinion gears, along with the differential components, are housed in a removable carrier, making gear changes and axle replacement quick and easy. 0000000016 00000 n For the do-it-yourselfer, Fabcraft offers a full-color manual with excellent tech info on the differential. Mickey Thompson even produced aftermarket Olds and Pontiac magnesium gear cases that were frequently used in dragsters. My 69 gto convert., purchased within the last year has a painful 2.56 rear gear. Understanding Aluminum Heads and Spark Plugs, OK Go Needing/Getting ~ Its All In The Timing, An Online Magazine for DIY Hot Rod Builders. A: Ford 9-inch is like the small-block Chevy of rearends. Discussion in 'Traditional Hot Rods' started by Ruiner, Sep 4, 2006. 62" 64-77 Chevelle, 73-76 Torino, 89 Trans Am. Rear axle widths. '71 Comet 60" 60's GMC and The Trophy Track's strengthened bearing hubs even use larger-than-stock bearings, the same ones found on spools. GM quit making the 9.3-inch in 1964. Add Width to . B. Interest in vintage drag racing is now approaching a rapid boil. 1958-1970 Full size Chevy rear differential identification chart. July 30, 2004 11:23PM. Rear Suspension Width (Flange to Flange), Donor Vehicles Front and Rear 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 : My rear is the bolt in axles. "SPECIAL" CARS - 1938 Pontiac Special six. 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. The two makes used very similar differentials through the mid-'40s and into the '50s. cars 6" - 8" for large cars, '71 Colt There are three different third-member castings, but all will install into any '57-'64 Pontiac/Olds housing. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. The P/O rearend and parts were getting harder to find and there were more Ford 9-inchers being made every day. My '64's measure 54.25". GMC V-6 Its narrow front end with a plastic, wrapped-around bumper featured fog lights as an option. i.e. Today finding a P/O 9.3 may take some searching and it's helpful to know what to look for. 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. They were robust, drop-out-style third members that offered the strength and serviceability racers required. & Conditions, Ford Mustang II/Pinto & Mercury Capri/Bobcat, Monte Carlo, Regal, etc. All housings have strong, tapered axle tubes, come in numerous widths, and sport a variety of suspension brackets. '69 Cougar, '71 -73 Nova Rusty but Rare 1976 Chevy K10 Sport Truck Revival! Plywood pieces work well for shims. 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. $1,825.00. Engine Numbers. sized GM Car, Malibu/Monte Carlo (82 up Metric Studs), 80 Granada & 0000004229 00000 n 0 Buick and Pontiac 10-bolt rear ends used flange-retained axles instead of the C-clip retained axles like those on Chevrolet rears. 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. I've read enough times that '64/'65 are 54.25" and '66's are an inch wider that I believe it. This number may be on the top, bottom, or either side of the axle shaft. Mavericks 8", All '75-77 6's & 8's Click the above picture to view full size. 1982-1997. . 4.24 out of 5 stars. There have been non C-clip rearends found in Chevelle wagons, and some El Caminos through at least 1974. '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger ?|-Zce14^nF%67( }fSRaQfqX?|{8{>? VX5EX=b :"-'k>.VbyV^-nWxv-WgUtpo>sMhlI4ZV<4+s>|2k>\x{7M^^x. 40/13. 0000003369 00000 n '72-75 Datsun Pickup Find 1967 PONTIAC GTO Differential & Rear-End Components and get Free Shipping on Orders Over $99 at Summit Racing! SKU: CE-GMG7887X. Like the 8.2-inch 10-bolt, the 8.5 10-bolts use C-clips to retain the axles. This information will change as further information and corrections become available. Underneath the back end of an overwhelming majority of gassers was a 1957-'64 Pontiac/Oldsmobile 9.3-inch differential. 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. )EgZ(WLlT!c!r~;+{( BRnpX{n>S;;5q N`+UHWF*FA6*BKm)JBw The End of an Era. This posi has 4 pinion gears, which makes it about 2 times as strong as the Chevy Eaton posi. %PDF-1.4 % You can do this by multiplying by the gear ratio. 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 . It has an M-21 four speed and I am ready to upgrade the rear diff. Its pretty easy to find a good one if you are in an area with a few junkyards. 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. Detroit gear & axle : AB : 3.36 : No : Powerglide : Detroit gear & axle : AC : 4.11 : No : 3 speed, O.D . '72 Cougar, '74 Pontiac, '49 Plymouth, '61 Chevrolet Impala 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? The new P/O 9.3-inch immediately found its way into hot rods and race cars. '69 Dodge Van, '71 Torino 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. Popular Automatic Transmission Identification Chart; Rear-End Widths of Classic American Cars; Follow Us on Flipboard . Your differential is the set of gears that allows your vehicles driven wheels to revolve at different speeds by splitting your engine torque in two directions, An Online Magazine for DIY Hot Rod Builders. Part Number: YGA-21289. They are also easily modified to suit any chassis. Several years later, the popularity of this almost deceased differential was rapidly swelling. 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. Registered: 16 years ago. 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. However, the 9.3-inch differential was saved from obsolescence by a Texas-based company called Fabcraft Metalworks and its owner, Brad Duerst. For many years prior, Olds and Pontiac differentials had been a dominant rear axle in drag racing and other motorsports. Rear axle flange to flange is supposedly wider than the 68-72 AND the 78-88 GM A and G body cars. PY Online Forums - Bringing the Pontiac Hobby Together, Classic TECH- specs, codes, resto issues FORUMS. Hot Rod Blueprints, Drawings and Tech Tips For The Hot Rod Enthusiast!. You're building a gasser. How To Box-In a Differential / Solid Axle Rear-End Housing; . 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. Professional technical support is available . 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. With perhaps less than 10 percent of Pontiac and Oldsmobile fullsize cars possessing the Safe-T-Track and Anti-Spin options, prices for unmolested examples remained high. //-->. 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
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