Working on my uncles 99 powder special. He lost reverse. I took the chain case apart and the buttons that protrude thru one gear and into the other on the drive shaft where shot along with the ring that holds them in. The ring had been rubbed by the studs ends that hold the bearing race in. Replaced all wore parts and before assembling I checked for clearance and the ring can still be pushed into the stud ends. I have looked at diagrams and there is one thick washer between the splined gear and the Bering face. Anyone have this issue before?