Yukon steel spool for GM 14 bolt truck with 30 spline axles, 4.10 & down

YP FSGM14T-3-30 Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. 4.10 and down ratio only or 4.56 and up thick gears Fits GM 10.5″ 14 bolt truck with 30 spline axles Not recommended for street driven vehicles Provides 100% traction to both wheels at all times Technical Notes: N/A COMPATIBLE DIFFERENTIALS GM 10.5" 14 Bolt Truck, '84-'85 Only GM 10.5" 14 Bolt Truck, '88 & older (excluding '84-'85) GM 10.5" 14 Bolt Truck, '89-'98 GM 10.5" 14 Bolt Truck, '99 & up