I think you need to get the A & B clutch assembly (Tower II) apart next. Amongst other things I should be looking for wear on the 3 pads on the back of the B clutch hub. Unworn pads look like this :



and not like this :



Just reiterating something that TriX5 mentioned earlier – it’s important to check all three of the ‘retained’ front axial needle roller bearings, which means detaching the cage from the raceway. For example, this bearing (actually an A clutch hub to B clutch hub bearing) nominally looks fine :



but if you detach the needle cage you can see that the raceway is actually badly pitted :



Phil