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Looking for aftermarket parts to modify or upgrade your 1981 GMC Jimmy with ring & pinions? At Tunersports.com we carry a huge selection of the top name brand performance ring & pinion parts and accessories.
 IN STOCK - DROPSHIPS YPKGM8.5-P-28Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement. ... Yukon Gear Positraction internals For 8.5in GM w/ 28 Spline Axles 1977-1982 GMC Jimmy Sierra Grande 1977-1985 GMC Jimmy High Sierra 1977-1989 GMC Jimmy Base / Sierra Classic $355.89 |