Looking for aftermarket parts to modify or upgrade your 1981 Chevrolet K20 with differentials? At Tunersports.com we carry a huge selection of the top name brand performance differential parts and accessories for your K20.
Whether you have a 1981 Chevrolet K20 in Cheyenne to Silverado trim we have you covered. We have 20 differentials available to mod your K20. All parts have free shipping to the Continental US 48 States.
 IN STOCK RD114Air locker locking differentials allow you to tackle the toughest terrain. The worlds premier traction aid, ARB air lockers keep you moving in all conditions.A complete air locker kit: replacement differential, activation switch, solenoid valve, air line and bulkhead fittings.... ARB Airlocker 10.5In 30 Spl Ff Gm 14 Bolt S/N 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,231.00 |
 IN STOCK RD166Air locker locking differentials allow you to tackle the toughest terrain. The worlds premier traction aid, ARB air lockers keep you moving in all conditions.A complete air locker kit: replacement differential, activation switch, solenoid valve, air line and bulkhead fittings.... ARB Airlocker Dana60Hd 35Spl4.56Up S/N.. 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,231.00 |
 IN STOCK RD167Air locker locking differentials allow you to tackle the toughest terrain. The worlds premier traction aid, ARB air lockers keep you moving in all conditions.A complete air locker kit: replacement differential, activation switch, solenoid valve, air line and bulkhead fittings.... ARB Airlocker Dana60Hd 4.10&Dn S/N.. 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,231.00 |
 IN STOCK - LOW RD221Air locker locking differentials allow you to tackle the toughest terrain. The worlds premier traction aid, ARB air lockers keep you moving in all conditions.A complete air locker kit: replacement differential, activation switch, solenoid valve, air line and bulkhead fittings.... ARB Airlocker 28 Spl Gm8.5In 10Bolt Aam860 S/N *Does NOT Dropship* 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,305.00 |
 SHIPS FROM MANUFACTURER RD234With our improved two piece design available right across the range, along with the addition of forged gears and an industry leading five year warranty, ARB Air Lockers are now better built and better backed than ever before. Created to provide 100 percent traction on demand, without sacrificing any... ARB Airlocker 10.5In 40 Spl Ff Gm 14 Bolt S/N 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,231.00 |
 SHIPS FROM MANUFACTURER RD235With our improved two piece design available right across the range, along with the addition of forged gears and an industry leading five year warranty, ARB Air Lockers are now better built and better backed than ever before. Created to provide 100 percent traction on demand, without sacrificing any... ARB Airlocker 10.5In 35 Spl Ff Gm 14 Bolt S/N 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,231.00 |
 IN STOCK YDGGM14T-3-30-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip Positraction For 10.5in GM 14 Bolt Truck / 4.10 & Down 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,057.89 |
 IN STOCK YDGGM8.5-3-28-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip Positraction For GM 8.5in w/ 28 Spline Axles 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $799.89 |
 IN STOCK YDGGM8.5-3-30-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip Positraction For GM 8.5in & 8.6in w/ 30 Spline Axles 1980-1981 Chevrolet K20 Cheyenne 1980-1983 Chevrolet K20 Silverado 1980-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $799.89 |
 IN STOCK YDGGM9.5-33-1The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence and performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction.... Yukon Gear Dura Grip Positraction For GM 9.5in w/ 33 Spline Axles 1979-1981 Chevrolet K20 Cheyenne 1979-1983 Chevrolet K20 Silverado 1979-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $899.89 |
 IN STOCK YGLGM14T-30The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns.... Yukon Gear Grizzly Locker For GM 10.5in 14 Bolt Truck w/ 30 Spline Axles 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $779.89 |
 IN STOCK YGLGM8.5-3-30The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns.... Yukon Gear Grizzly Locker For GM 8.5in & 8.6in / 30 Spline / 2.73+ 1980-1981 Chevrolet K20 Cheyenne 1980-1983 Chevrolet K20 Silverado 1980-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $1,031.89 |
 IN STOCK YP MINSGM14T-30Yukon mini spools provide the traction of a full spool at an economical cost.... Yukon Gear Mini Spool For GM 10.5in 14 Bolt Truck 1975-1981 Chevrolet K20 Cheyenne 1975-1983 Chevrolet K20 Silverado 1975-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $282.89 |
 IN STOCK - DROPSHIPS YP MINSGM8.5-28Mini spools are a low-cost traction option for vehicles looking for full-time lockup.... Yukon Gear Mini Spool For GM 8.5in w/ 28 Spline Axles 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $164.89 |
 IN STOCK YP MINSGM8.5-30Mini spools are a low-cost traction option for vehicles looking for full-time lockup.... Yukon Gear Mini Spool For GM 8.5in w/ 30 Spline Axles 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $183.89 |
 IN STOCK - DROPSHIPS SL GM8.5-28USA Standard Spartan Locker For GM 8.5in w/ 28 Spline Axles / Incl. Heavy-Duty Cross Pin Shaft 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $582.89 |
 IN STOCK - DROPSHIPS SL GM8.5-30USA Standard Spartan Locker For GM 8.5in w/ 30 Spline Axles / Incl. Heavy-Duty Cross Pin Shaft 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $582.89 |
 IN STOCK - DROPSHIPS SL XP-GM8.5USA Standard Spartan Locker 8.5in GM Spartan Locker Cross Pin 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $51.51 |
 IN STOCK - DROPSHIPS ZP MINSGM8.5-28USA Standard Mini Spool For GM 8.5in / 28 Spline 1977-1981 Chevrolet K20 Cheyenne 1977-1983 Chevrolet K20 Silverado 1977-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $129.89 |
 OUT OF STOCK YZLCOMPRESSOR-01Air compressors provide the necessary pressure to engage a selectable air-operated locking differential like the Yukon Zip Locker.... Yukon Gear Zip Locker Compact Air Compressor for Air Operated Locker Operation Only 1980-1981 Chevrolet K20 Cheyenne 1980-1983 Chevrolet K20 Silverado 1980-1986 Chevrolet K20 Scottsdale 1981-1981 Chevrolet K20 Deluxe 1981-1986 Chevrolet K20 Custom $255.89 |