Washer tub would not spin

The top panel and outer shell had to be removed, and the machine set down on its side. The motor was the removed from the gearcase, unhooking 2 clips, which is where the coupling is located. That by itself was easy enough, but while it was all apart, I noticed the when turning the gearcase manually, where the coupling attaches to, in either direction, the washer tub and agitator drive shaft would still not spin. I had to also remove the gearcase from the washer and take it apart. This entailed removing the entire agitator unit from the tub, and removing the gearcase and drive shaft unit from the washer. After taking off the gearcase housing, it is filled with oil, so be prepared, it also turned out that one of the pieces under of the gear and pinion that engages the gear to the tub's drive shaft had come off. I was able to re-position it correctly, but I also had to put a slight flaring on the pin with a small hammer and screwdriver, that the piece rested on, so it would not slip off again. When re-assembling, I just use 70w gear case oil to refill the unit with, and sealed the housing with form-a-gasket. So, while the unit is all apart, be sure to manually turn the gearcase crank in both directions, one way the washer tub spins, and the reverse direction the agitator moves, to make sure everything else is working correctly while the washer is already apart. Also, its a good idea after it is all put back together to test the washer on small load setting without any clothes in it. The washer is working great now, I've run over a dozen loads without any issues.