GM 8.5", 10 BOLTS , 28 SPLINES MINI SPOOL
FITS GM 10 BOLTS REAR END WITH 8.5" DIAMETER RING GEAR & 28 SPLINES AXLE.
MADE BY USING HIGH QUALITY ALLOY STEEL FOR GREAT STRENGTH.
MINI SPOOLS ARE COMPLETE SPIDER GEAR REPLACEMENT THAT FITS INSIDE STANDARD OPEN CARRIER & LOCK BOTH AXLE FOR FULL TIME INCREASED TRACTION.