Replaced bearings, shaft, seal with recommended installation tool due to loud noise on spin cycle--typical jet engine sound. Afterwards,turned tub by hand, no pop. On first wash load, there was a popping noise when the tub turned--about 1 pop/revolution. Removed tub but didn't find anything out of the norm. Did not notice anything unusual when replacing bearings, etc. Now tub pops when turning by hand. Turns smoothly and no bearing noise or pop during spin cycle, only during wash cycle, maybe rinse also. Any ideas--I'm baffled.