Hi Jai, Paul D reccomended I contact you regards rebuilding a diff. I have a suspect front pinion bearing failing, and I have two possible soloutions to replace the complete diff unit. I have currently a 10 spline diff that I can replace with a good used front 24 spline and HS's. But what I also have is a good 10 spline built diff with arb centre, but its been used on the rear. Paul D suggested I rebuild it with the orriginal front crown and pinion gears from the orriginal diff. He said its not too hard to do. Is it just a question of marking the bearing adjusters positions and reassembling the same way? How do I know when the back lash is correct? I appreciate your help, thanks Jim