Replaced gearbox, now tub is banging and cycles are crazy

I replaced the gearbox, because the old one was squeaking during spin cycles. I ran the calibration in diagnostic mode and thought all was well, but had issues when I tried a load of wash. The tub now bangs when trying to spin. I checked the suspension, and everything seems to be fine. The wash cycles seem to be out of whack as well, the time remaining keeps changing, and the washer seems to fill, drain, agitate, etc. and not follow the old wash patterns it used to.


Help, please! I've just sunk $160 into a two year old washer, and don't want it to get any worse!