View our Specials! Coupon Code: SaveIn2026
Looking for 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 - DROPSHIPS 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 |
 OUT OF STOCK YDGGM12T-3-33-1Yukon 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. Yukon Dura Grips are constructed wi... Yukon Gear Dura Grip Limited Slip Differential for GM 12 Bolt 33 Spl 2.76-3.42 Ratio 1979-1982 GMC C1500 Sierra Grande / Street Coupe 1979-1986 GMC C1500 Base / High Sierra / Sierra Classic $795.89 |
 IN STOCK - DROPSHIPS 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 |
 OUT OF STOCK YP MINSGM12-30Yukon mini spools provide the traction of a full spool at an economical cost.... Yukon Gear Mini Spool 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 $277.89 |
 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 |