to change without notice. The two makes used very similar differentials through the mid-'40s and into the '50s. //-->. A: Extremely strong! 0000000911 00000 n May 7, 2009. Currie Centurion Housing - Classic notchback looks in a new, high-strength, American-made housing, that features 3-inch diameter axle tubes, and CNC machined face flange, for a flat leak-free . The high-volume production runs of Ford-9 inch components allow them to be relatively inexpensive. To say I was disappointed by the service provided by this company would be an understatement. Find your GMC/Chevy vehicle in the chart below and click on the illustration for a larger view. . 0000008567 00000 n Last Update: Feb. 24, 2023, 5:12 a.m. It has been my experience that the 66 up axle is longer. also note on the A4's (auto's) shifter console if the gear selector for 1 is missing. Ford continued cranking out the 9-inch in vast quantities well into the '80s. But the components should at least be grounded in the era. plate to backing plate. Picture is from parts book. Pontiacs had 1.75-inch-wide drums in 1957-58 while Olds used 2-inch from 1959-on, both used 2-inch brakes. I placed the order with Speedway motors in late July for my rear end housing and Currie axles. L = Low - Zero to Negative Offset, Offset typically RWD (Rear . 1969. The Rochester Quadrajet carburetor was featured on the top spec GTO. BOP, Pontiac, Each. Someone may correct me, but as I recall 1959 was the first year for the "Wide Track" Pontiac. 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 dana pinion stands forward about 2" more than the 9 1/4, the driveshaft will need to be shortened accordingly. In searching the web I found the following links that have a massive of information on rear end widths and wanted to share. '71 Comet , '71- 72 Pinto, '39 -48 Chevrolet, '68 GTO 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. Jeremy. 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. 0 1982 to 1984: 7.5 inch ring gear, 26 spline axle. Rear axle widths. 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. '70 Duster 1982-1997. "Hy-Tuff" axles are available for it from Moser and Mark Williams in any length (needed to . 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. "+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. '55 -57 Chevrolet, 68-69 Fair lane 6 or 8 Mopar Rear Axle. These dimensions do not include brake drums and are measured from backing plate to backing plate. 0000001644 00000 n They are also easily modified to suit any chassis. . 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. '67 to '70 Mustang/Cougar 8 cyl. cars 6" - 8" for large cars, '71 Colt 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. Approximate rear end widths measured from backing 1990 to 1992: 7.625 inch ring gear, 28 spline axle. For 1966-1970 Plymouth and Dodge B-bodies there were three basic rear end assemblies that were available: the 8, the 8, and the 9 Dana 60. . My '64's measure 54.25". startxref 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. Contributing information were Bob Welch, J Forbes and various locations throughout the Web and Automotive Magazines. Vehicle. (painful to me while driving) I am pretty sure that it is the standard BOP 8.2, 10 bolt. 5E med-duty 4-pinion. 5D med-duty 4-pinion. Add Width to compensate for drums as follows: 4" - 5" for small cars 5" - 6" for intermediate cars 6" - 8" for large cars . '72-73 Mazda, '28-40 Ford , '57 - 59 Ford It may not display this or other websites correctly. Suspension Width (Flange to Flange), Ford Mustang II/Pinto & 0000002004 00000 n They're tough, right? 1956 and back have 10-spline axles. 1939 engine numbers run 1915447 through 2697267. )EgZ(WLlT!c!r~;+{( BRnpX{n>S;;5q N`+UHWF*FA6*BKm)JBw 70 2wd 6 lug rear end 12 bolt Possible gear ratio's 3:08, 3:40, 3:73 70-81 4wd 6 lug reared 71- Newer 2wd trucks use a 5 on 5 lug pattern 71-76 Full Size Cars " "" "" ". 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. '70 Nova 57" 71-74 V-8 Mavericks 8", All '75-77 6's & 8's Maverick 5 Lug 8", 49-51 Ford, 57-59 Ford 9", 58" 78-88 Mid sized GM Car, Malibu/Monte Carlo (82 up Metric Studs), 80 Granada & Lincoln Versailles, 67-70 Mustang/Cougar/Fairlane, Regal with 10 bolt axle, S-10 P.U., 65-67 Nova, 60" 55-64 Chevy Car, 67-69 Camaro, 64-67 Chevelle, 68-74 Nova, 71-73 Mustang/Cougar, 84-95 Corvette, 60-61" 64-69 1/2 ton 2wd Chevy/ Some GMC 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. 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. lx ?ZXj^|\\(|ka(XKIg#+ note 64 64 axle is same. '67 Mustang V-8, '69 Firebird Rusty but Rare 1976 Chevy K10 Sport Truck Revival! ?|-Zce14^nF%67( }fSRaQfqX?|{8{>? VX5EX=b :"-'k>.VbyV^-nWxv-WgUtpo>sMhlI4ZV<4+s>|2k>\x{7M^^x. '72 Cougar, '74 Pontiac '49 Plymouth, '61 Chevrolet Impala '65 Cadillac, '66 Buick Wildcat '66-67 Chevrolet Big Car, '72 Charger Quick question, I'm looking at a '50 Pontiac and was wondering if it had a torque-tube or a driveshaft. 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. In 1957, the Pontiac and Oldsmobile designs were combined and improved upon, producing a brand new 9.3-inch differential. 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. 0000003369 00000 n Both of these are semi-floating axles. Displays PONTIAC bolt patterns, wheel sizes and dimensions by model or view all matching vehicles that will swap or interchange with PONTIAC wheels. If you noticed the axles are missing you would be correct. 66-69 axle does not include 64 65 . 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. B. 40/13. used a 3.21 Dana 44 used a standard chevy The Pontiac/Oldsmobile 9.3-inch is your axle. Professional technical support is available . 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. The other drawback is that you can only check for clearance at the height the jack stands are set to. Advance Design Trucks seem to be using rear of extensive information was contributed by R. Welch: Original Vehicles S10. Contributing information were Bob Welch, J Model. 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. 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. However, the 9.3-inch differential was saved from obsolescence by a Texas-based company called Fabcraft Metalworks and its owner, Brad Duerst. 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70. 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. '70 Duster , '71-77 Maverick The new P/O 9.3-inch immediately found its way into hot rods and race cars. The '70 to '81 Camaro rear end is 61 inches. Building an example that truly reflects what was around back then takes a certain passion for correctness. 59" 68-83 Corvette , 67-70 Mustang/Cougar/Fairlane, 60" 55-64 Chevy The 1' wider that was stated in paul/chuck 's book may have been miss spoke. well i have 1 from f 150 82 b/plate 2 b/plate it is 58". Year. This number may be on the top, bottom, or either side of the axle shaft. %%EOF This method will work but the wheels are always trying to roll away and tip over making it very hard to check for clearance and be sure that your measurements are correct . 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. The new 9.3-inch provided outstanding durability when subjected to abuse from all classes of race cars, including Top Fuel. the wider housing is not 1" closer to 3/4 . GU2 - 2.73's Standard auto trans gear ratio. . . Aftermarket support followed in the form of beefy axles, gears, spools, couplers, and Mickey Thompson's aluminum and magnesium centersections. (Dart/Duster) with V8&3/4 axle, Table taken from "How to Build GM quit making the 9.3-inch in 1964. Vehicles with Similar . For some time, only a small handful of ratios were available in new gears. I'm not sure of the Task Force width ranges at this time. Its role in drag racing was limited to primarily Stock, Super Stock, and Factory Experimental Fords. The Borg-Warner HD rear end was dropped and replaced with the old 7.625 (7 5/8) inch rear end. Detroit gear & axle : AB : 3.36 : No : Powerglide : Detroit gear & axle : AC : 4.11 : No : 3 speed, O.D . 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? xb```"~> !%1#XY} P A1@G7L/^nkX,i{j^vL@l ` n It has an M-21 four speed and I am ready to upgrade the rear diff. Accurate Differential Identification is the first and most important step in your differential repair, upgrade or overhaul project. No one is making new 31-spline side gears at this time, which is not good. Chevy 10 Bolt Rear End Widths. Several features are common to most gassers. 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. 68-74 Nova, 71-73 Mustang/Cougar, 84-95 Corvette, 60-61" 64-69 1/2 ton 2wd Chevy/ Some GMC 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. I'm not sure of the Popular Automatic Transmission Identification Chart; Rear-End Widths of Classic American Cars; Follow Us on Flipboard . For many years prior, Olds and Pontiac differentials had been a dominant rear axle in drag racing and other motorsports. Buy in monthly payments with Affirm on orders over $50. 1940 engine numbers run 2697268 through 3665902. "" "" ". pontiac rear end width chart . Casting # Year: Body: Size: Notes: 2070051: 1960 - 71: A . My 69 gto convert., purchased within the last year has a painful 2.56 rear gear. This posi has 4 pinion gears, which makes it about 2 times as strong as the Chevy Eaton posi. '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 5" for small cars 5" - 6" for intermediate some Chevy's Dana 44 or Dana 60 with leaf springs 6 lug, Gear ratio's Drag Racing 101 ~ Everything You Need to Know! ; Home 2; Home 3; Home / / pontiac rear end width chart. What I did is shown below in the photos. For instance, if both the engine and transmission deliver up to 100 ft./lbs. . Ford. 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. The early Nova's 62-67 would be about 2" shorter. Look at the RPO codes. Car, 67-69 Camaro, 64-67 Chevelle, Dec 20, 2007. The 10-bolt was used in all the low performance applications. The P/O rearend and parts were getting harder to find and there were more Ford 9-inchers being made every day. AXLE DIFF 4X4 FRONT DIFF PARTS AXLE DIFF REAR END PARTS . Six-cylinder truck engine block and head casting numbers. 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. Compared side-by-side with the Chrysler, it boasted stronger gears and larger bearings. } Many Ford 9-inch parts are made offshore; they have smaller bearings and smaller diameter gears requiring less material. The 78-88 mid size GM cars use a 7.5" 10 bolt, which is about 58/5" wide. Source for tire and wheel application fitment data. Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. 60" 60's GMC and '67 Chevrolet big car charles coker, 1953 pontiac tech advisor. 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? 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. It has been my experience that the 66 up axle is longer. Chrysler sent out the last of its 8.75-inch rearends in the early '70s. Calculating the torque multiplication that your axle gears provide is quite easy. Additionally, it can be a relatively affordable way to enjoy a day at the track. I'm running the wider blazer rear end . Is a pontiac center section as olds rear ends of that era? 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. '66 Falcon, '69 Chevrolet Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188. var I=new Image(1,1); I.src=u; 0000000716 00000 n It is now late November and I still do not have my axles. On Gen1, the code is "hit" on the right side of the rear axle (passenger side) with the inscriptions facing the front of . All but a few of the old factory limited-slips had been gathered up and beaten to death. '68 AMX Its pretty easy to find a good one if you are in an area with a few junkyards. Newest [ January 23, 2023 ] Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory Roadkill Powersports 20 0 obj<>stream 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. As a result, many tribute cars and gasser-inspired builds had to stray from correctness. '73 Ventura, '73 Mustang, '36 Plymouth, '54-56 Ford Pickup 0000005198 00000 n If it has the original Borg Warner posi then it is stronger than the Chevy 10 bolt. Rey Payumo of Kailua, Hawaii found this 1963 Chevrolet Impala packed with junk in a garage in Hayward, California. '72 Cougar How to cut your Ford F100 long bed to short bed in a weekend DIY project ~ Two-Part video details cutting frame and bed. Here you can see the three white paint splotches identifying the pinion size and the gears. . July 30, 2004 11:23PM. It's not to the same level as a concours-correct restoration; no judge will deduct points for an incorrect paint code. All correct GM codes and part numbers. endstream endobj 29 0 obj<>stream Engine Numbers. Check our the Chevy rear end gear ratio chart above to help you identify the correct gear to use. RWD (rear-wheel drive), automatic 4-speed gearbox. Understanding Aluminum Heads and Spark Plugs, OK Go Needing/Getting ~ Its All In The Timing, An Online Magazine for DIY Hot Rod Builders. Approximate rear end widths measured from backing plate to backing plate. (Rear Wheel Drive) +20 offset. '74 Valiant, '57 Ford jack39rdstr # 169783 04/02/10 02:03 PM. Because the Borg-Warner axles were no longer being used for the G92 option, optional axle ratios changed slightly: LB9 305 TPI 5 speed went from 3.45 (1989) to 3.42 (1990) and the B2L 350 TPI went from 3.27 (1989) to 3.23 (1990). Shop Full Width; Shop With Sidebar; . There is also a yellow stamp 10 22 which is the . Stop listening to your street rodder buddy and back away from the 9-inch. 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. The power is transmitted to the road by the rear . My rear is the bolt in axles. I ordering the axles from Bears Performance who kept thier promise of delivery in about a week. The Olds and Pontiac both used the same center section. 2D reg-duty / 4D med-duty 4-pinion. 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 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. 1/4 Mile : 13.1 seconds. The End of an Era. 4.24 out of 5 stars. June 5, 2022 Posted by: Category: Uncategorized Several years later, the popularity of this almost deceased differential was rapidly swelling. According to published lists, the 55-64 Chevrolet rear end width is 60" from wheel mount surface to wheel mount surface. Q: What cars did they originally come in? Ironically the heavy-duty nature of the 9.3 worked against it and played a part in its demise. list of rear ends and their dimensions to help narrow the search for a possible sized GM Car, Malibu/Monte Carlo (82 up Metric Studs), 80 Granada & You are using an out of date browser. 3.08. While the Ford 9-inch is the perceived benchmark of popular rearends today, in stock form the edge would go to the Pontiac/Olds. Wheel- Size.com The world's largest wheel fitment database. The final drive ratio is identified with 2 or 3 letters codes. SiteStats_3379(); . '67 Lincoln, '69 Dodge Rear End Widths - - Back - - Home > Specs > Rear End Widths : Representative for comparison purposes only. '69 Javelin Six , '70 dodge 1310 yoke, Dana 60 used the heavy duty yoke which takes the larger 1350 yoke. Actual wheel track could be as much as 6" to 8"depending on drum size: '67 to '70 Mustang/Cougar 6 cyl. The current axle needs to be measured to verify width, because it plays an important part in determining what rim backspacing is necessary. Originally posted by SUNNYD @Mar 22 2007, 10:23 PM~7534589. Pontiac labeled theirs Safe-T-Trac while Oldsmobile called it Anti-Slip.