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Looking for in-stock aftermarket parts to modify or upgrade your 1981 GMC C1500 with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories.
 IN STOCK - LOW YDGGM12T-3-30-1Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a h... Yukon Gear Dura Grip Limited Slip Differential for GM 12 Bolt 30 Spl 2.76-3.42 Ratio 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $754.89 |
 IN STOCK YDGGM12T-4-30-1Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a h... Yukon Gear Dura Grip Positraction For GM 12 Bolt Car w/ 30 Spline Axles / 3.73+ 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $919.89 |
 IN STOCK - LOW YDGGM8.5-3-28-1Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a h... Yukon Gear Dura Grip Positraction For GM 8.5in w/ 28 Spline Axles 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $908.89 |
 IN STOCK - DROPSHIPS YP MINSGM8.5-28Yukon Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier in place of the spider gears and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Full spools ar... Yukon Gear Mini Spool For GM 8.5in w/ 28 Spline Axles 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $188.89 |
 IN STOCK - DROPSHIPS SL GM12-30USA Standard Spartan Locker For GM 12 Bolt Car & Truck w/ 30 Spline Axles 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $734.89 |
 IN STOCK - DROPSHIPS SL GM8.5-28USA Standard Spartan Locker For GM 8.5in w/ 28 Spline Axles / Incl. Heavy-Duty Cross Pin Shaft 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $661.89 |
 IN STOCK - DROPSHIPS SL XP-GM12USA Standard Spartan Locker 12 Bolt GM Spartan Locker Cross Pin 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $56.89 |
 IN STOCK - DROPSHIPS ZP MINSGM8.5-28USA Standard Gear Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier in place of the spider gears and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Fu... USA Standard Mini Spool For GM 8.5in / 28 Spline 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $148.89 |