Ford, Lincoln, Mercury (4WD/RWD) Differential Spool - Rear - Yukon Gear and Axle - YP FSF9-31

Spool
YP FSF9-31
,1.785,31spl,9,F9-SPOOL-31,FORD,JRNL,SPOOL,STEEL,YP,
88-55 FRD/LIN/MER
Yukon steel spool for Ford 9" with 31 spline axles
Yukon Performance steel spool for 9" Ford with 31 spline axles. Spool uses 1.785" journal bearings. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.
9"FORD 31spl STEEL SPOOL,1.785"JRNL
Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications.
Yukon Full Spools are a cost-effective way to convert a diff to 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each Yukon spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outstanding choice for dedicated off-road and drag racing vehicles only.
Fits Ford 9" with 31 spline axles
Provides 100% traction to both wheels at all times
Not recommended for street driven vehicles