Yukon GM 8.5" & 8.6" Steel Spool - 30-Spline, 2.73 & Up 1980-chevrolet-k20-esi8508551 21 gear ratio good for

21 gear ratio good for highway driving

SPEC grease formula controls heat during high-speed desert or Ultra4 conditions

The Yukon Dana 44 Grizzly Locker is a full mechanical automatic locking differential designed for 30 spline Dana 44 axle applications using 3

the shaft lengths must change to maintain correct fitment

or supporting ARB Air Locker systems

Yukon GM 8.5" & 8.6" Steel Spool - 30-Spline, 2.73 & Up 1980-chevrolet-k20-esi8508551 21 gear ratio good forThis 30 spline steel spool for GM 8. 5" and 8. 6" rear axles is designed to deliver maximum strength and full time traction in drag racing, mud trucks, and dedicated trail rigs where traction and simplicity are critical.. By replacing the factory differential carrier, it permanently locks both axle shafts together, ensuring equal torque delivery to both wheels under all conditions. Commonly found in GM trucks, SUVs, and performance cars, the 8. 5" and