Motive Gear GM10-390 Ring and Pinion-GM 8.5/8.625 for Select Buick Electra, Buick Rainier, Buick Regal, Buick Riviera, Buick Skylark, Buick Sportwagon, Cadillac Escalade, Cadillac Escalade ESV, Cadillac Escalade EXT, Chevrolet Avalanche, Chevrolet

Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner's circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.

RP GM 8.5" 8.6" 3.90 MG

Fits: 1971-1989 Buick Electra, 2004-2007 Buick Rainier, 1976-1987 Buick Regal, 1975-1978 Buick Riviera, 1970-1979 Buick Skylark, 1970-1972 Buick Sportwagon, 1999-2013 Cadillac Escalade, 2003-2013 Cadillac Escalade ESV, 2002-2013 Cadillac Escalade EXT, 2007-2013 Chevrolet Avalanche, 2002-2006 Chevrolet Avalanche 1500, 1970-1975 Chevrolet Bel Air, 1987-1994 Chevrolet Blazer, 1979-1986 Chevrolet C10, 1988-1999 Chevrolet C1500, 1989-2000 Chevrolet C2500, 1970-1981 Chevrolet Camaro, 1970-1996 Chevrolet Caprice, 1973 Chevrolet Chevelle, 2004-2013 Chevrolet Colorado, 1991-1994 Chevrolet Commercial Chassis, 1971-1976 Chevrolet El Camino, 1970 Chevrolet Estate, 1996-2014 Chevrolet Express 1500, 1996-1998 Chevrolet Express 2500, 1979-1995 Chevrolet G10, 1975-1995 Chevrolet G20, 1971-1996 Chevrolet Impala, 1977-1986 Chevrolet K10, 1988-1999 Chevrolet K1500, 1977-1986 Chevrolet K20, 1988-1991 Chevrolet K2500, 1977-1986 Chevrolet K5 Blazer, 1971-1972 Chevrolet Kingswood, 1978-1983 Chevrolet Malibu, 1973-1978 Chevrolet Monte Carlo, 1970-1979 Chevrolet Nova, 1994-2004 Chevrolet S10, 1994 Chevrolet S10 Blazer, 2003-2006 Chevrolet SSR, 1999-2017 Chevrolet Silverado 1500, 2007 Chevrolet Silverado 1500 Classic, 2007 Chevrolet Silverado 1500 HD Classic, 1987-1994 Chevrolet Suburban, 1995-2014 Chevrolet Suburban 1500, 1995-2017 Chevrolet Tahoe, 1971-1972 Chevrolet Townsman, 2002-2009 Chevrolet Trailblazer, 2002-2006 Chevrolet Trailblazer EXT, 1977-1978 GMC C15 Suburban, 1979-1998 GMC C1500, 1979-1999 GMC C1500 Suburban, 1977-1978 GMC C25 Suburban, 1997-1998 GMC C2500, 1979-1986 GMC C2500 Suburban, 2004-2012 GMC Canyon, 2002-2009 GMC Envoy, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 1979-1995 GMC G1500, 1978 GMC G25, 1979-1995 GMC G2500, 1994 GMC Jimmy, 1977-1978 GMC K15, 1977-1978 GMC K15 Suburban, 1979-1998 GMC K1500, 1979-1999 GMC K1500 Suburban, 1977-1978 GMC K25, 1977-1978 GMC K25 Suburban, 1979-1991 GMC K2500, 1979-1986 GMC K2500 Suburban, 1987-1991 GMC R1500 Suburban, 1987-1990 GMC R2500 Suburban, 1996-2013 GMC Savana 1500, 1996-1998 GMC Savana 2500, 1999-2017 GMC Sierra 1500, 2001-2006 GMC Sierra 1500 HD, 2007 GMC Sierra 1500 HD Classic, 1994-2004 GMC Sonoma, 1992-1993 GMC Typhoon, 1987-1991 GMC V1500 Suburban, 1987-1990 GMC V2500 Suburban, 1992-2013 GMC Yukon, 2000-2013 GMC Yukon XL 1500, 2006-2010 Hummer H3, 2009-2010 Hummer H3T, 2003-2008 Isuzu Ascender, 1970-1987 Oldsmobile Cutlass, 1978-1984 Oldsmobile Cutlass Calais, 1980-1983 Oldsmobile Cutlass Cruiser, 1975-1987 Oldsmobile Cutlass Salon, 1970-1987 Oldsmobile Cutlass Supreme, 1976 Oldsmobile Cutlass Tiara, 1973-1979 Oldsmobile Omega, 1970-1986 Pontiac Bonneville, 1970-1981 Pontiac Catalina, 1970-1981 Pontiac Firebird, 1970-1973 Pontiac GTO, 1975-1983 Pontiac Grand LeMans, 1971-1987 Pontiac Grand Prix, 1971-1978 Pontiac Grand Safari, 1971-1981 Pontiac LeMans, 1976-1977 Pontiac Ventura

Please review Specifications and the detailed fitment table for notes and exceptions.