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.

78-7528-1 Application Notes

  • For GM 7.5" (10 Bolt)
  • 28 Spline
  • Mini Spool
  • For Open Differential
  • For Carriers With Equal Size Large Windows
  • Fits In GM7.5 26 Spline Open Carrier
  • Requires Aftermarket 28 Spline Axles

Warranty

1 Year or 50,000 Miles

78-7528-1 Specifications

Differential Case Design Type GM 7.5, GM 7.625
Spline Quantity 28
Taxonomy A Differential LD
Taxonomy B Differential Lockers & Spools
Taxonomy C GM 7.5, GM 7.625
Taxonomy D Mini-Spools
Where to buy

Vehicle Applications

  • 1973 – 1975 Buick Apollo
  • 1978 – 1981 Buick Century
  • 1991 Buick Commercial Chassis
  • 1976 – 1985 Buick Electra
  • 1977 – 1983 Buick Estate Wagon
  • 1975 – 1985 Buick LeSabre
  • 1978 – 1987 Buick Regal
  • 1977 – 1978 Buick Riviera
  • 1991 Buick Roadmaster
  • 1975 – 1980 Buick Skyhawk
  • 1976 – 1979 Buick Skylark
  • 1987 Cadillac Brougham
  • 1982 – 1984 Cadillac DeVille
  • 1982 – 1986 Cadillac Fleetwood
  • 1985 – 1987 Chevrolet Astro
  • 1982 – 1987 Chevrolet Camaro
  • 1977 – 1987 Chevrolet Caprice
  • 1976 – 1987 Chevrolet El Camino
  • 1977 – 1979 Chevrolet Impala
  • 1978 – 1983 Chevrolet Malibu
  • 1978 – 1988 Chevrolet Monte Carlo
  • 1975 – 1980 Chevrolet Monza
  • 1977 – 1979 Chevrolet Nova
  • 1982 – 1987 Chevrolet S10
  • 1983 – 1987 Chevrolet S10 Blazer
  • 1982 – 1987 GMC S15
  • 1983 – 1987 GMC S15 Jimmy
  • 1985 – 1987 GMC Safari
  • 1977 – 1984 Oldsmobile 98
  • 1977 – 1987 Oldsmobile Custom Cruiser
  • 1978 – 1981 Oldsmobile Cutlass
  • 1985 – 1987 Oldsmobile Cutlass
  • 1978 – 1984 Oldsmobile Cutlass Calais
  • 1980 – 1983 Oldsmobile Cutlass Cruiser
  • 1978 – 1980 Oldsmobile Cutlass Salon
  • 1985 – 1987 Oldsmobile Cutlass Salon
  • 1978 – 1987 Oldsmobile Cutlass Supreme
  • 1977 – 1985 Oldsmobile Delta 88
  • 1975 – 1979 Oldsmobile Omega
  • 1975 – 1979 Plymouth Poseidon
  • 1977 – 1986 Pontiac Bonneville
  • 1977 – 1981 Pontiac Catalina
  • 1982 – 1987 Pontiac Firebird
  • 1978 – 1980 Pontiac Grand Am
  • 1978 – 1980 Pontiac Grand LeMans
  • 1978 – 1987 Pontiac Grand Prix
  • 1977 – 1978 Pontiac Grand Safari
  • 1977 – 1981 Pontiac Laurentian
  • 1978 – 1981 Pontiac LeMans
  • 1977 – 1986 Pontiac Parisienne
  • 1978 – 1979 Pontiac Phoenix
  • 1987 – 1989 Pontiac Safari
  • 1976 – 1977 Pontiac Ventura
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