My son hasn't really driven the truck in a few months because he doesn't like to hear it click from the rear and I'm tired of buying a new diff ring and pinion weekly for it. We drove it again today and it was really bad. Just wondering in the past few months if anyone has come up with a better solution? I took it apart today and added a couple more shims, I believe I used 2 the first time but I could only find one on there which makes me think one disintegrated. Anyway, I had it nice and tight and still it clicks. I checked the bulkhead and it doesn't seem to have any cracks, the only thing that really jumps out at me is the diff never turns true, its always wobbling a bit which is where the problem is coming from I believe.