Never liked this job much, because it can evolve into taking the assy. apart a few times to change shims to get the proper backlash and tooth contact pattern right.
And while you can get the backlash right, if the tooth contact is wrong, pull it down do it again.
Shops that do this a bunch usually have that $$$ guage tool that predetermines the setup so they only have to do this once.
That sound you hear when you back off could be improper tooth contact, assuming you don't have it on the power side. But then the bearings can play into also.
For me,it was how much time and effort I wanted to put into it or how much I was willing to spend so I didn't have to go thru the hassel.
Dan
