Allstar Performance mini spool, 8.5 GM 10 Bolt, 28 spline, for race car drivetrains. Ensures equal power distribution in racing setups. Bolt-on installation for track use.
Mini spool fits a GM 10-bolt differential with a 8.5 inch ring gear with 28 spline axles. This unit fits a 1970-76 GM 10-bolt differential with a 8.5 inch diameter ring gear using 28-spline axles and a non-positive traction case. Cross pin (Allstar part 68161) must be ordered separately. This mini spool is precisely machined for proper fit, and then heat treated.