Stop listening to your street rodder buddy and back away from the 9-inch. Compared to the Ford, the P/O parts were more expensive. There are three different third-member castings, but all will install into any '57-'64 Pontiac/Olds housing. GU2 - 2.73's Standard auto trans gear ratio. Outside of flange to outside 54.25" 66 up are wider. Year. '67 to '70 Mustang/Cougar 8 cyl. It's not to the same level as a concours-correct restoration; no judge will deduct points for an incorrect paint code. /** * Error Protection API: WP_Paused_Extensions_Storage class * * @package * @since 5.2.0 */ /** * Core class used for storing paused extensions. '71 Comet Axle Shaft, Rear, 1541H Alloy, 28 Spline, 29.875 in. 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. 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. The following information is provided to help you identify the differential you are working on. |;|tB70t:`!t;?Yp?o^16Y*Ra(k ;6te64^bv n+;:G57@hbM_5 N '69 Nova '72 Charger Rey Payumo of Kailua, Hawaii found this 1963 Chevrolet Impala packed with junk in a garage in Hayward, California. '69 Firebird 0000012085 00000 n According to published lists, the 55-64 Chevrolet rear end width is 60" from wheel mount surface to wheel mount surface. Estimated Lead Time: 5-Days. Information provided by:Joe GarciaThe Resto Rod Shop. My 69 gto convert., purchased within the last year has a painful 2.56 rear gear. NFTs Simplified > Uncategorized > pontiac rear end width chart. Once I had determined the desired width with the loose wheels and tape measure I constructed a wood rear end out of a 2x4. PY Online Forums - Bringing the Pontiac Hobby Together, Classic TECH- specs, codes, resto issues FORUMS. All correct GM codes and part numbers. A solid front axle was found under the front of nearly every gasser. Six rib cases will be found on '57 and '58 rearends, '59-64s have seven ribs. Detroit gear & axle : AB : 3.36 : No : Powerglide : Detroit gear & axle : AC : 4.11 : No : 3 speed, O.D . with 10 bolt axle, "A" body 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 : 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. '70 Nova My rear is the bolt in axles. %%EOF For a better experience, please enable JavaScript in your browser before proceeding. 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. '69 Javelin Six , '70 dodge Vehicle. M&M CUSTOM. The new 9.3-inch provided outstanding durability when subjected to abuse from all classes of race cars, including Top Fuel. For a variety of reasons, not the least of which is the current Gasser craze, Pontiac and Olds rearends are enjoying renewed popularity. 18 21 Dec 26, 2008. No one is making new 31-spline side gears at this time, which is not good. Interest in vintage drag racing is now approaching a rapid boil. A: Ford 9-inch is like the small-block Chevy of rearends. Product By Category; Products By SKU/ID; . '72-73 Mazda, '28-40 Ford , '57 - 59 Ford GM / Chevy - Differential IdentificationShop by your differential. B-O-P axles also have identifying grooves traveling along each side of . 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. The dana pinion stands forward about 2" more than the 9 1/4, the driveshaft will need to be shortened accordingly. with 10 bolt axle. The Rochester Quadrajet carburetor was featured on the top spec GTO. Please select a rear end that matches your vehicle below.General Motors has a wide range of front and rear ends! Buy in monthly payments with Affirm on orders over $50. I have a source for the axleshafts and the difference in the shafts shows this to be true, BUT doesn't show the diff center . Jeff Smith: When Chevrolet built the first Camaros in 1967, they were already in production of both 10- and 12-bolt rear-end housings. Copyright 2023 Welcome To Rodplans! Several features are common to most gassers. 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. While it still may take an investment in time to locate a good third-member core and housing for your gasser project, these components are still relatively plentiful and quite affordable. function SiteStats_3379(){ 70-81 4wd 6 lug reared You are using an out of date browser. used a 3.21 Dana 44 used a standard chevy If in doubt, consult one of our differential experts at (800)510-0950! (rear-wheel drive), automatic 3-speed gearbox . The non C-clip 8.5" 10 bolt, type "C" rearend was used in some 1969-'72 Pontiac GP and 1970-'72 Monte Carlo. 0 endstream endobj 29 0 obj<>stream How to cut your Ford F100 long bed to short bed in a weekend DIY project ~ Two-Part video details cutting frame and bed. 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A: They came in all fullsize Pontiacs and Oldsmobiles from 1957-64. Housings with leaf springs were used under Pontiac and Olds in 1957 and Olds only in 1958-60; Pontiacs had coil . '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger I did a quick google search for 65 impala rear end, and 65-66 impala rear end came up a lot. 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. endstream endobj 19 0 obj<> endobj 21 0 obj<> endobj 22 0 obj<>/Font<>/ProcSet[/PDF/Text]/ExtGState<>>> endobj 23 0 obj<> endobj 24 0 obj<> endobj 25 0 obj[/ICCBased 36 0 R] endobj 26 0 obj<> endobj 27 0 obj<> endobj 28 0 obj<>stream Jeremy. Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars . 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. 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 ordering the axles from Bears Performance who kept thier promise of delivery in about a week. compensate for drums as follows: 4" - note 64 64 axle is same. If you're building a period-correct car, especially a Gasser, they are undoubtedly the perfect rearend for today. The renewed interest in the P/O 9.3-inch generated high demand for any limited-slip units that were left. For many years prior, Olds and Pontiac differentials had been a dominant rear axle in drag racing and other motorsports. 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. Below matches. While the Ford 9-inch is the perceived benchmark of popular rearends today, in stock form the edge would go to the Pontiac/Olds. Rusty but Rare 1976 Chevy K10 Sport Truck Revival! Both of these are semi-floating axles. stock from flange to flange it is 60 ". Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. 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. GM with 7.5 & 7.625 Ring Gears : 1985-1997. 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 '67 Mustang ends with widths ranging from 58"- 62". The 78-88 mid size GM cars use a 7.5" 10 bolt, which is about 58/5" wide. 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. 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 . SKU: CE-GMG7887X. Compared side-by-side with the Chrysler, it boasted stronger gears and larger bearings. Someone may correct me, but as I recall 1959 was the first year for the "Wide Track" Pontiac. '73 Ventura, '65 Ram American '67 Chevrolet big car Find 1967 PONTIAC GTO Differential & Rear-End Components and get Free Shipping on Orders Over $99 at Summit Racing! GM 10-bolt rear ends have four basic ratio choices: 2.73, 3.08, 3.42, and 3.73 . HVr0*u9$K;IG]&U&"x\s. var t=new Date(); Ford. June 5, 2022 Posted by: Category: Uncategorized Buick and Pontiac 10-bolt rear ends used flange-retained axles instead of the C-clip retained axles like those on Chevrolet rears. Posts: 8. Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. var u='http://50chevy.freeservers.com/cgi-bin/sitestats.gif?p='+escape(location.href)+';r='+escape(document.referrer)+';t='+t.getTime(); All but a few of the old factory limited-slips had been gathered up and beaten to death. plate to backing plate. Hot Rod Blueprints, Drawings and Tech Tips For The Hot Rod Enthusiast!. 2D reg-duty / 4D med-duty 4-pinion. 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. 1982 to 1984: 7.5 inch ring gear, 26 spline axle. 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. Ford continued cranking out the 9-inch in vast quantities well into the '80s. '72-75 Datsun Pickup If you noticed the axles are missing you would be correct. ZE reg-duty / 4E med-duty 4-pinion. 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. Contributing information were Bob Welch, J Forbes and various locations throughout the Web and Automotive Magazines. . Rear-end track width measurements of classic American cars including Chevrolet, Ford, and Mopar vehicle rear axle widths. . Plywood pieces work well for shims. Car, 67-69 Camaro, 64-67 Chevelle, Lincoln Versailles, Regal with 10 bolt axle, S-10 P.U., 65-67 Nova. GMC V-6 Add Width to ; Home 2; Home 3; Home / / pontiac rear end width chart. What is the width of a 1959 pontiac rear end? Grand Prix. '41 -48 Ford, '68-72 Chevelle 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. GM quit making the 9.3-inch in 1964. 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. Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188. GU5 - 3.23's Optional auto trans gear ratio. '72 Dart Mavericks 8", All '75-77 6's & 8's 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. 1958-1970 Full size Chevy rear differential identification chart. Richmond Gear calls the 57-64 Olds/Pontiac rear a GM 9.3" Axle (the ring gear is 9.3 inches). Last Update: Feb. 24, 2023, 5:12 a.m. Mickey Thompson even produced aftermarket Olds and Pontiac magnesium gear cases that were frequently used in dragsters. for highway driving. J.T. 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. Like most american muscle cars of the Day the Pontiac GTO was a front engined rear wheel driven car. 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. It may not display this or other websites correctly. The P/O rearend and parts were getting harder to find and there were more Ford 9-inchers being made every day. Under the hood, Pontiac installed a 2.5 . There's absolutely no excuse to use the wrong differential in your gasser. For instance, if both the engine and transmission deliver up to 100 ft./lbs. but the body with is 1" wider on 66-67. Rusty but Rare 1976 Chevy K10 Sport Truck Revival! The Pontiac/Oldsmobile 9.3-inch is your axle. I'm not sure of the Identified by casting number & number of cover bolts. The '70 to '81 Camaro rear end is 61 inches. 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. I actually had the axles in less than 4 days! '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 0000000991 00000 n xref 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. '72 Cougar, '74 Pontiac, '49 Plymouth, '61 Chevrolet Impala Q: Why do Pontiac/Olds 9.3 parts cost more than those for a Ford 9-inch? 1939 engine numbers run 1915447 through 2697267. The 8.2" BOP (Buick, Oldsmobile, Pontiac) model is slightly different in that it uses pressed on axle bearings and instead of c-clips . The intake valve size increased to 2.11" and the exhaust valve increased to 1.77"in size from the previous model. Originally posted by SUNNYD @Mar 22 2007, 10:23 PM~7534589. 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. Ironically the heavy-duty nature of the 9.3 worked against it and played a part in its demise. By designing ring-and-pinion sets to fit the previously less-attractive, but more available, Series II OE carriers, performance ratios could now be utilized without the need for an unfavorable ring-gear spacer. Housings with leaf springs were used under Pontiac and Olds in 1957 and Olds only in 1958-60; Pontiacs had coil springs in 1958-60 and from 1961-64 both had coils. You can do this by multiplying by the gear ratio. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Find your GMC/Chevy vehicle in the chart below and click on the illustration for a larger view. "+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. if you dont have a versailles just a regular 9 inch rear end,, that is also 60 ". 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. 0000002277 00000 n Shop Full Width; Shop With Sidebar; . Chevy 10 Bolt Rear End Widths. "Hy-Tuff" axles are available for it from Moser and Mark Williams in any length (needed to . All Pontiac Firebird 2nd-gen. Trans Am Coupe versions offered for the year 1977 with complete specs, performance and technical data in the catalogue of cars . Very hard to find set, being as this is version is not being reproduced. The following tags will show a 4L80E transmission as an example. Trans Am. 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 '70's Ford Grenada The other drawback is that you can only check for clearance at the height the jack stands are set to. A turbocharger was added to the 301 to give the 1980 Trans Am an injection of performance. 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. 20 0 obj<>stream Picture is from parts book. 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. This posi has 4 pinion gears, which makes it about 2 times as strong as the Chevy Eaton posi. On Gen1, the code is "hit" on the right side of the rear axle (passenger side) with the inscriptions facing the front of . 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. 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. These dimensions do not include brake drums and are measured from backing plate to backing plate. The final drive ratio is identified with 2 or 3 letters codes. GU3 - 3.08's V6 gear ratio. Suspension Width (Flange to Flange), Ford Mustang II/Pinto & I placed the order with Speedway motors in late July for my rear end housing and Currie axles. 5D med-duty 4-pinion. The following list Beginning with a new line of U.S.-made gearsets in desirable ratios, Fabcraft rekindled the flickering flame of the 9.3-inch.
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