Now i think, that that ball- 5th gear detent have fallen into oil when I removed rear cap.
Thing is- i have only 116hp - I was pulling, going smooth and when I wanted to put in 5th--kabum,, krak, krak, krrrrr,.... And this happened. :(
I'm a VW fella, who use UN1 box from renault espace.
I just had a masive 5th input/output gear failure.
And found this (ball bearing?) metal ball....
Ball bearing is fine-- where I got this from?!?- Im woundering in detailed picture- this might be it???