I had my 833 reebuilt by a good shop last year for my latest project, and like everyone else he's out of business.
The transmission seems fine other than it's pretty stiff going in and out of reverse, I've driven it about 500 yards so far. it's not the linkage or the shift arm rubbing the case I've checked that out it's internal. is it possible to over tighten the reverse detent ball? and can I adjust that? if not I guess I'll have to live with it.