Perfect for replacing the hub seal on my '99 F-350. I have the Traction Lok version of the differential. If you haven't already, I recommend reading the service manual, YouTube, etc. The custom nut requires special tightening procedures and the procedure is different for the 3(?) possible differentials Ford used. The seal is also special and affects both hub removal and replacement. Pressing the seal into the hub also requires care as it can easily be damaged. This is an interesting seal as it is both a seal and a sealing surface in one device. This tool is well made and great value.