I installed my precision brand 4.10 gears and my own solid spacer/reluctor. I have installed several gearsets without issue before. I have had these gears for 3 years sitting around, just never got the chance to install them. Now I fought these gears to get a pattern. The drive is almost perfect just a touch shallow. Coast is a touch deep but near the toe. This is the best pattern I could get after MANY trials. The pattern Is within acceptable range on drive and coast with coast being the worst of the two. Glad I allways use setup bearings! Backlash was .009-.011. The gears made noise on coast and drive when just on the gas,coast is a little less. So I took it back apart and checked everything again(all right). I did lower by backlash to .007-.009. A touch tight I know. pinion shim is .048 preload is 16ish without a seal and I have good preload on the carrier. The whine is a little less and perhaps liveable. Im NOT happy with it though. Any ideas In case I decide to go it again to get it quieter? I would have and may still go with AAM gears but they werent available when I got the package deal.