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GM 8.5" Rear - 28 Spline - 10 bolt cover with 8.5 ring gear. Ring gear has 10 bolts and pinion has 30 spline. C clip rear could have 28 or 30 spline axles. Sometimes referred to as the GM 10-bolt . GM 8.5" Rear - 28 Spline
10 bolt cover with 8.5" ring gear. Ring gear has 10 bolts and pinion has 30 spline. C/clip rear could have 28 or 30 spline axles. Sometimes referred to as the "GM 10-bolt".

•  Ring Gear Diameter:  8.500
•  Cover Bolts:  10
•  Ring Gear Bolts:  10
•  Spline Count:  28
•  Dropout:  False
•  Pinion Support:  False
•  Carrier Breaks:  2.56 / 2.73
•  Rear Suspension:  Solid
•  Pinion Nut Size:  1-1/4

Compatible with Models:

Apollo:  1973 - 1975  (Rear)
Bel Air:  1970 - 1975  (Rear)
Blazer:  1979 - 1994  (Rear)
Bonneville:  1970 - 1986  (Rear)
C10 1/2 Ton (2WD):  1979 - 1987  (Rear)
C15/ C1500 1/2 Ton (2WD):  1979 - 1990  (Rear)
C1500 1/2 Ton (2WD):  1988 - 1990  (Rear)
Camaro:  1970 - 1981  (Rear)
Caprice:  1970 - 1996  (Rear)
Catalina:  1970 - 1981  (Rear)
Chevelle/ Malibu:  1973 - 1973  (Rear)
Cutlass:  1970 - 1977  (Rear)
Cutlass:  1985 - 1987  (Rear)
El Camino:  1971 - 1976  (Rear)
Electra:  1971 - 1989  (Rear)
Firebird:  1970 - 1981  (Rear)
G10 1/2 Ton:  1979 - 1989  (Rear)
G15/ G1500 1/2 Ton:  1979 - 1988  (Rear)
G20 3/4 Ton:  1975 - 1989  (Rear)
G25/ G2500 3/4 Ton:  1978 - 1988  (Rear)
Grand Prix:  1971 - 1987  (Rear)
GTO:  1970 - 1977  (Rear)
Impala:  1971 - 1988  (Rear)
K10/ K1500 1/2 Ton (4WD):  1979 - 1988  (Rear)
K15/ K1500 1/2 Ton (4WD):  1979 - 1988  (Rear)
K5 Blazer (4WD):  1979 - 1991  (Rear)
LeMans:  1971 - 1983  (Rear)
Malibu:  1973 - 1983  (Rear)
Monte Carlo:  1973 - 1978  (Rear)
Nova:  1970 - 1979  (Rear)
Omega:  1973 - 1979  (Rear)
Phoenix:  1978 - 1979  (Rear)
Regal:  1973 - 1987  (Rear)
Regal:  1985 - 1987  (Rear)
Riviera:  1975 - 1978  (Rear)
Skylark:  1970 - 1972  (Rear)
Skylark:  1975 - 1979  (Rear)
Sonoma:  1994 - 1998  (Rear)
Suburban 1/2 Ton:  1979 - 1991  (Rear)
Suburban 1/2 Ton:  1979 - 1991  (Rear)
Suburban 1/2 Ton:  1979 - 1991  (Rear)
Suburban 1/2 Ton:  1979 - 1991  (Rear)
Trans Am:  1970 - 1981  (Rear)
Ventura:  1976 - 1977  (Rear)