I understand everything except how to remove the drive belt.
There are 2 belts, and they merely slip off. No tools required. Lean the machine back against the wall so you can get to them.
You're going to also have to remove the 3 large tub springs in order to replace the snubber pads under the transmission. I have some old tricks for doing this more easily here.
I seldom had to replace those damper pads except when they were visibly worn to the metal. There are lots of reasons the tub may not line up with the lid opening...
1. Machine not level
2. Tub springs out of adjustment
3. Oil on snubber area (bad lip seal)
4. Worn tub mounting stem and bearing
Replacing the dampers may not be needed but if you feel like they might help, go ahead.