GBodyParts.com has recently announced these 8.5″ Posi Traction Clutch Rebuild Kits. According to GbodyParts owner, Brian Weaver, “the idea behind the 8.5 Posi Clutch Disc and Shim Kit was to offer a comprehensive kit that addresses the void left by GM when they discontinued Part Number 0023-1127.
Without the availability of this kit, GM rendered the rebuildable 8.5 Posi Units useless once the clutches were fried. You had to spend over $500 for a new posi & installation kit.”
You can learn more about them in the official release below, as well as see the complete rundown of applications these will work for!
Official Release:
8.5″ Posi Traction Clutch Rebuild Kits
We are now manufacturing Carbon Steel 8.5 Clutch Kits. As you may recall, production was discontinued back in 09. This kit improves upon & replaces GM part # 00231127.
This kit will only service the 8.5″ 10 bolt Eaton style posi carriers. This is the type of posi used in the 86-87 GN/Turbo Regal and 85-87 Olds Cutlass 442, ’84 Hurst Olds and many other 8.5 GM truck & car models. Please inquire first if you are not sure if this is the type of posi in your rear axle. 7.5 rears do not use these clutches.
This kit Includes all the clutch discs as shown in the picture. We also carry the S-spring and other parts to rebuild and repair your rear end.
These kits will work fit the following:
Oldsmobile 8.5 Type O Differentials from 1967 – 1970.
GM Corporate 8.5 Differentials from 1971 – 1988.
The 8.5 Clutch Kits fit Oldsmobile 8.5 Type O Differentials from 1967 – 1970.
These kits also fit the GM Corporate 8.5 Differentials from 1971 – 1987.
This includes the following vehicles:
1971 – 1972 Oldsmobile Cutlass and 442
1971 – 1972 Buick Skylark and Gran Sport
1973 – 1977 Cutlass, 442, Regal, Malibu and LeMans
1973 – 1977 Buick Regal, Century and GS
1984 Hurst Olds
1985 – 1987 442
1984 – 1987 Grand National and T-Type with Turbocharged 3.8
1967 – 1970 Oldsmobile 8.5 O Type 12 Bolt
1967 – 1970 9 3/8 Big Car Oldsmobile, Buick and Cadillac
1971 – 1984 Cadillac Fleetwood
1971 – 1984 Cadillac Coupe and Sedan De Ville
1975 – 1979 Cadillac Seville
1971 – 1976 Buick Electra
1977 – 1984 Buick Electra
1971 – 1976 Buick LeSabre
1977 – 1985 Buick LeSabre
1971 – 1978 Buick Riviera
1971 – 1981 Camaro and Z/28
1971 – 1981 Firebird and Trans Am
1971 – 1979 Nova, Omega, Apollo, Ventura
1974 Pontiac GTO
1971 – 1987 Chevrolet Caprice
1971 – 1986 Pontiac Bonneville and Parisienne
1971 – 1985 Oldsmobile Delta 88
1971 – 1984 Oldsmobile 98
This comprehensive kit is a direct replacement for GM Part Number 23-1127. As an upgrade over the GM Kits, our kits also include 12 shims: 2 of each in the following thickness: .010, .015, .020, .025, .030, and .035.
Our kits are 100% MADE IN USA!
U.S. steel with U.S. tooling. All the metal has been tested for Rockwell hardness.
The results specs out the same as the factory. We went with the cross hatch surface pattern (like a Chevy 12 bolt clutch) instead of the fish eye pattern for two reasons:
Reason 1: The die to stamp the pattern was less costly which keeps the costs of the kits down
Reason 2: This pattern offers superior lubrication which will enhance the life of the clutches.
Price is $199.95
Installation Instructions can be downloaded HERE
For the 8.5″ Eaton Posi “S” Spring, click HERE
Rick Seitz is the owner and founder of GMEFI Magazine, and has a true love and passion for all vehicles. When he isn’t tuning, testing, or competing with the brand’s current crop of project vehicles, he’s busy tinkering and planning the next modifications for his own cars.
