Review on Spicer 50491 Axle Shaft Seal by Staxy Asedr

This gasket fits my 2004 F-250 6.0 perfectly. I've had it on my truck for 4 months now and it's still working great. When I installed it, I didn't buy the installation tool. I just built one out of a PVC coupler, a piece of pipe and a PVC sanitary cap. This part is necessary to allow hubs to auto-lock when vacuum is applied to the axle.