It seems the gearbox had a pretty hard live in my 20k mls (!) Inno, with a (previously not so well welded) cracked casing. Due to impact through the Inno sump guard
Almost every bearing with spalling or broken cages. The layshaft worn out, a broken final drive gear bolt just loosely held in place by the tab-washer and a reverse gear that looks like some rodent’s been nibbling on it.
Options:
- find a used one in good nick - has anyone here got one spare?
- going the OTT route of metal spraying and regrinding the existing one.