...into an AMC M20. I know most of you probably aren't too familiar with this axle, but it seems fairly normal. It uses a crush sleeve, so no shimming for the pinion bearing preload, which is nice. I also noticed that there was no shim under the inner pinion bearing, so I was wondering what sets the pinion depth. Well it seems that they have placed the shim between the inner pinion race and the carrier. I suppose that that also makes sense, but our superior master install kit came with no shims that size. There was only one shim behind the old race, and it broke when we were punching out the race. It was .100" thick too. So is there a place to get the shims we need quick? Would and auto parts store carry something like that? I hope I don't have to order it from Randy's R&P, I wasn't planning for that much down time here. Another stupid thing, we made "setup bearings" before we realized that the shims don't go on between the pinion and the bearing, which means that you only have to press the bearing onto the pinion ONCE, which means that we completely wasted our time making that setup bearing. So does anyone have any experience or tips for this axle, so far nothing has gone well.