Differential Mini Spool

Richmond Spools are the lightest, strongest, and most efficient way to lock both axle shafts together. They're CAD/CAM-designed, CNC-machined from 4140 alloy-steel forgings, and heat-treated to aircraft standards.

78-1028-1 Application Notes

  • For GM 8.5" (10 Bolt)
  • 28 Spline
  • Mini Spool
  • For Open Carriers
  • Steel

Warranty

1 Year or 50,000 Miles

78-1028-1 Specifications

Differential Case Design Type GM 8.5
Spline Quantity 28
Taxonomy A Differential LD
Taxonomy B Differential Lockers & Spools
Taxonomy C GM 8.5
Taxonomy D Mini-Spools
Where to buy

Vehicle Applications

  • 1973 – 1975 Buick Apollo
  • 1973 – 1977 Buick Century
  • 1991 – 1996 Buick Commercial Chassis
  • 1976 – 1981 Buick Electra
  • 1985 – 1989 Buick Electra
  • 1977 – 1981 Buick Estate Wagon
  • 1973 – 1974 Buick LeSabre
  • 1977 – 1981 Buick LeSabre
  • 1985 – 1990 Buick LeSabre
  • 1973 – 1977 Buick Regal
  • 1984 – 1987 Buick Regal
  • 1977 – 1978 Buick Riviera
  • 1991 – 1996 Buick Roadmaster
  • 1971 – 1972 Buick Skylark
  • 1975 Buick Skylark
  • 1977 – 1979 Buick Skylark
  • 1971 – 1975 Chevrolet Bel Air
  • 1971 – 1972 Chevrolet Biscayne
  • 1987 – 1991 Chevrolet Blazer
  • 1971 – 1972 Chevrolet Brookwood
  • 1980 – 1986 Chevrolet C10
  • 1980 – 1986 Chevrolet C10 Suburban
  • 1988 – 1998 Chevrolet C1500
  • 1992 – 1996 Chevrolet C1500 Suburban
  • 1980 – 1986 Chevrolet C20 Suburban
  • 1992 – 1996 Chevrolet C2500 Suburban
  • 1971 – 1981 Chevrolet Camaro
  • 1971 – 1996 Chevrolet Caprice
  • 1970 – 1973 Chevrolet Chevelle
  • 1973 – 1976 Chevrolet El Camino
  • 1996 Chevrolet Express 1500
  • 1996 Chevrolet Express 2500
  • 1975 – 1995 Chevrolet G10
  • 1970 – 1974 Chevrolet G10 Van
  • 1975 – 1995 Chevrolet G20
  • 1970 – 1974 Chevrolet G20 Van
  • 1971 – 1985 Chevrolet Impala
  • 1994 – 1996 Chevrolet Impala
  • 1977 – 1986 Chevrolet K10
  • 1977 – 1986 Chevrolet K10 Suburban
  • 1988 – 1998 Chevrolet K1500
  • 1992 – 1996 Chevrolet K1500 Suburban
  • 1977 – 1986 Chevrolet K20
  • 1977 – 1986 Chevrolet K20 Suburban
  • 1992 – 1996 Chevrolet K2500 Suburban
  • 1977 – 1986 Chevrolet K5 Blazer
  • 1971 – 1972 Chevrolet Kingswood
  • 1970 – 1979 Chevrolet Nova
  • 1987 Chevrolet R10
  • 1987 – 1988 Chevrolet R10 Suburban
  • 1989 – 1991 Chevrolet R1500 Suburban
  • 1987 – 1988 Chevrolet R20 Suburban
  • 1989 – 1991 Chevrolet R2500 Suburban
  • 1971 – 1972 Chevrolet Townsman
  • 1987 Chevrolet V10
  • 1987 – 1988 Chevrolet V10 Suburban
  • 1989 – 1991 Chevrolet V1500 Suburban
  • 1987 Chevrolet V20
  • 1987 – 1988 Chevrolet V20 Suburban
  • 1989 – 1991 Chevrolet V2500 Suburban
  • 1977 – 1981 Chrysler Comet
  • 1980 – 1986 GMC C1500
  • 1988 – 1998 GMC C1500
  • 1980 – 1986 GMC C1500 Suburban
  • 1992 – 1996 GMC C1500 Suburban
  • 1980 – 1986 GMC C2500 Suburban
  • 1992 – 1996 GMC C2500 Suburban
  • 1998 GMC C3500
  • 1975 – 1978 GMC G15
  • 1970 – 1974 GMC G15/G1500 Van
  • 1979 – 1995 GMC G1500
  • 1975 – 1978 GMC G25
  • 1970 – 1974 GMC G25/G2500 Van
  • 1979 – 1995 GMC G2500
  • 1977 – 1991 GMC Jimmy
  • 1977 – 1978 GMC K15
  • 1977 – 1978 GMC K15 Suburban
  • 1979 – 1986 GMC K1500
  • 1988 – 1998 GMC K1500
  • 1979 – 1986 GMC K1500 Suburban
  • 1992 – 1996 GMC K1500 Suburban
  • 1977 – 1978 GMC K25
  • 1976 – 1978 GMC K25 Suburban
  • 1979 – 1986 GMC K2500
  • 1994 GMC K2500
  • 1979 – 1986 GMC K2500 Suburban
  • 1992 – 1996 GMC K2500 Suburban
  • 1987 GMC R1500
  • 1987 – 1991 GMC R1500 Suburban
  • 1987 – 1991 GMC R2500 Suburban
  • 1996 GMC Savana 1500
  • 1996 GMC Savana 2500
  • 1987 GMC V1500
  • 1987 – 1991 GMC V1500 Suburban
  • 1987 GMC V2500
  • 1987 – 1991 GMC V2500 Suburban
  • 1971 – 1984 Oldsmobile 98
  • 1971 – 1989 Oldsmobile Custom Cruiser
  • 1971 – 1977 Oldsmobile Cutlass
  • 1975 – 1977 Oldsmobile Cutlass Salon
  • 1971 – 1977 Oldsmobile Cutlass Supreme
  • 1976 Oldsmobile Cutlass Tiara
  • 1971 – 1985 Oldsmobile Delta 88
  • 1970 – 1972 Oldsmobile F85
  • 1973 – 1975 Oldsmobile Omega
  • 1977 – 1979 Oldsmobile Omega
  • 1971 – 1986 Pontiac Bonneville
  • 1971 – 1981 Pontiac Catalina
  • 1970 – 1981 Pontiac Firebird
  • 1970 – 1973 Pontiac GTO
  • 1975 – 1977 Pontiac Grand LeMans
  • 1971 – 1977 Pontiac Grand Prix
  • 1971 – 1978 Pontiac Grand Safari
  • 1971 – 1975 Pontiac Grandville
  • 1971 – 1977 Pontiac LeMans
  • 1983 – 1986 Pontiac Parisienne
  • 1977 Pontiac Phoenix
  • 1987 – 1989 Pontiac Safari
  • 1971 – 1977 Pontiac Ventura
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