Well, running my sc10 today I thought I stripped the diff gears. The diff was making a sound kinda like a zip tie. It progressively got worse until the truck didnt move. I took the diff apart and found no obvious damage to anything. I googled it an read that it's common for the diff to require shims to tighten up the backlash between the gears. Anybody else have this problem? What shims would I need also. I wish this thing had a ball diff