OER Parts offers a wide selection of Rear End Components for your 1977 GMC Jimmy. OER Parts offers 1977 GMC Jimmy Axle Shafts & Parts, 1977 GMC Jimmy Differential, 1977 GMC Jimmy Differential Covers, 1977 GMC Jimmy Differential Hardware, 1977 GMC Jimmy Differential Tools, 1977 GMC Jimmy Driveshaft, 1977 GMC Jimmy Driveshaft Safety Loops, 1977 GMC Jimmy Gaskets & Seals, 1977 GMC Jimmy Performance Rear Ends, 1977 GMC Jimmy Ring & Pinion Gears, and 1977 GMC Jimmy U-Joints and Parts.