5 friction/clutch clearance issue in a 904

Another thing I noticed was that the snap ring was a flat snap ring, and not a waved snap ring like the book calls for. Any problems running this? From what I've read it sounds like this will bang 3rd and reverse a bit harder. Thoughts on this?
the wavey snap ring was used as a cushion for reverse. using a flat snap ring will firm up the apply. a stall convertor eased the shock a little. rule of thumb is about .010 clearance per friction, so you need at least .050.