The drive block is supposed to have that notch taken out of it. If the noise is that big bang at the end of the cycle, that means your brake probably has some buildup on there causing it to stop too hard.
Thanks for the info on the notch. Eases my mind a bit. Unfortunately, the banging is throughout the cycle so its not just the brake, though that would fix that issue. So, its starting to sound like multiple issues.
You've come this far, might as well have the basket out of there for a good look-see. You'll need a special tool to get the spanner nut off.
Any place other than an appliance parts store that I can get that spanner tool?