It's a setting more than it is torque: For a 1999 Super Duty Dana hub-
- While rotating the hub and tightening the nut, torque to 75 lb/ft
- Loosen the nut 90*
- To verify that there is no side-to-side end play, attach a magnetically mounted dial indicator to the spindle end and place the dial indicator tip on the outboard surface of the hub. Check for side-to-side end play. Slowly tighten the nut until there is zero end play with a light amount of preload. Final bearing adjustment has zero end play and the maximum torque to rotate the hub is 2.3 Nm (20 lb-in) when end play is zero.
An experienced technician can do this by feel. I will tighten the nut until I can feel preload resistance while rotating the hub and back it off, then tighten until there is no more play pushing in and pulling out on the hub. Then one or two clicks of the hub nut to final set. Rotate the hub by hand - it should have some slight resistance and rotate smoothly. The initial torque is especially important if you are installing a new hub or replacing the bearing cups.
The procedure for the Ford axle is a little different.
