Yukon GM 8.5" & 8.6" Steel Spool - 30-Spline, 2.73 & Up 1980-chevrolet-k20-esi8508551 This is a thick gear

This is a thick gear set

Includes setup and installation components

restoration builds

Built for durability and smooth operation

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

Yukon GM 8.5" & 8.6" Steel Spool - 30-Spline, 2.73 & Up 1980-chevrolet-k20-esi8508551 This is a thick gearThis 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