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    Clutch Disc/Shim Kit, Rear Differential, 8.5" Posi, Supplemental

    Vehicle Specific fits 11 models
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    Part# CH31613
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    8.5" Posi Units

    Includes necessary clutch discs and shims

    The 8.5" posi clutch disc and shim kit is available to offer a complete kit to be able to rebuild the factory GM 8.5 posi-traction differential clutch packs and shims in their rear-ends. These kits feature carbon steel clutches which are very similar to the ones used by GM from the factory and the necessary shims. Also available is a supplemental kit which includes various parts to rebuild the differential itself including the s-spring, thrust washers, cross pin, cross pin bolt, c-clips and GM Limited Slip Additive. Most importantly each kit is made right here in the U.S.A.!


    • (8) tabbed carbon steel clutch discs, (6) splined carbon steel clutch discs, (2) .010 shims, (2) .015 shims, (2) .020 shims, (2) .060 shims
    WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

    Vehicle Fitment

    Make & Model Year Range Application Details
    Buick Grand National 84-87 supplemental kit
    Buick Regal 84-87 supplemental kit
    Buick T-Type 84-87 supplemental kit
    Cadillac Fleetwood 71-84 supplemental kit
    Chevrolet Chevelle 70-77 supplemental kit
    Chevrolet El Camino 70-77 supplemental kit
    Chevrolet Monte Carlo 73-77 supplemental kit
    Oldsmobile Cutlass 71-77 supplemental kit
    Pontiac Bonneville 71-76 supplemental kit
    Pontiac Catalina 71-76 supplemental kit
    Pontiac Grand Prix 73-76 supplemental kit
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    Clutch Disc/Shim Kit, Rear Differential, 8.5
    Clutch Disc/Shim Kit, Rear Differential, 8.5" Posi, Supplemental