[QUOTE=dayglo33;9433944]A couple questions.
1 Has anyone have the spur gear rub the center mount?
QUOTE]

I had that problem.
I fixed it by replacing 89019.Took me forever to figure that out. Since it is not a moving part I figured that cant be bad. Well I think what happens is the diff get hot & after a while those parts loose their shape. I want to change it to metal when Grid comes out with one.Integy has one but I rather get Grids.