DARN IT!!! I am also getting sick and tired of these diff problems
I also experience loosening of the diffs. It started out in the rear then I started experiencing the same in the front. Already had 2 races wherein I was running 2nd or 3rd place. Every after final heat run, I inspect the diff and find that it is becoming loose. I therefore tighten every after a run. In the last final heat, am still running 2nd or 3rd then suddenly the center diff screw head breaks and makes me DNF the last final heat, thus dropping my standing.
Bought 2 new diffs, ceramic nitride balls, and Version 1.1 diff gears. B4, the suspect was that the lock nut was damaged. Hopefully with these 2 new diffs, I won't have the same problems.
I am very happy with the PRO4 - am one of those from our club that is sticking it out with pro4 and not shifting to XRAY - if not only for these diff problems.
My setting for diff tightening is simple.
Rear - tighten til it stops. go back 1/2 turn.
Front - tighten til it stops/ go back 1/4 turn.
I have a race tonight again for MOD - hopefully my new diffs work properly this time.
Question, with ceramic nitride balls, the diffs a definitely more plush and smooth. Do I follow the same tightening setting above? Seems too loose now - or is it just because it is smoother?