3.42 Ratio Differential Ring and Pinion for 8.5 (Inch) (10 Bolt)

Richmond Gear ring and pinions are perfect for any vehicle where performance and durability matters. Made from first-run steel, never recycled material, Richmond ring and pinions handle the extreme torque from high horsepower engines. Extensive engineering, computer controlled heat treatment, superior strength, quality and the widest selection of racing gear ratios available, make Richmond Gear the clear winner! Winners Run Richmond!

49-0278-1 Application Notes

  • For GM 8.5"/8.625" (10 Bolt)
  • 3.42 Ratio
  • 2.73 Ratio Carrier and Higher

Warranty

2 Years or 100,000 Miles

49-0278-1 Specifications

Cover Bolt Quantity 10
Differential Carrier Break 2.76 and Higher
Differential Case Design Type GM 8.5, GM 8.625
Pinion Gear Tooth Quantity 12
Pinion Shaft Diameter 1.626 (Inch)
Pinion Spline Count 30
Ring & Pinion Gear Ratio 3.42
Ring Gear Bolt Quantity 10
Ring Gear Diameter 8.5 (Inch)
Ring Gear Material 8620 Steel
Ring Gear Rotation Standard
Ring Gear Tooth Quantity 41
Where to buy

Vehicle Applications

  • 1987 – 2005 Chevrolet Blazer
  • 1977 – 1986 Chevrolet K10
  • 1977 – 1986 Chevrolet K10 Suburban
  • 1988 – 1999 Chevrolet K1500
  • 1993 – 1999 Chevrolet K1500 Suburban
  • 1988 – 1991 Chevrolet K2500
  • 1975 – 1986 Chevrolet K5 Blazer
  • 1991 – 1994 Chevrolet S10 Blazer
  • 1981 – 1984 Chevrolet Terrain
  • 1987 Chevrolet V10
  • 1987 – 1988 Chevrolet V10 Suburban
  • 1989 – 1991 Chevrolet V1500 Suburban
  • 1994 – 2005 GMC Jimmy
  • 1979 – 1986 GMC K1500
  • 1988 – 1999 GMC K1500
  • 1979 – 1986 GMC K1500 Suburban
  • 1992 – 1999 GMC K1500 Suburban
  • 1979 – 1986 GMC K2500
  • 1988 – 1991 GMC K2500
  • 1979 – 1986 GMC K2500 Suburban
  • 1987 GMC V1500
  • 1987 – 1991 GMC V1500 Suburban
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