Susan :

On the early 091 transmissions, the shift-fork adjustment was critical.
On the later (091-1)models, there was no adjustment at all. I can't
remember what year you had.

A worn gear hub or operating sleve gives this type of slipping out of
gear, but VW sells the hub and sleeve together- you should not have an
old sleeve.

If it is late model, that it almost *has* to be an external adjustment.

Good luck!
TomC

..the transmission i've
> been waiting to be rebuilt is now finished and back in the van, but my
> mechanic just called to say that during the test drive it slipped out of
> fourth gear several times. he said that if, while in 4th gear, he eased
> up on the gas and then applied gas again, it'd pop out of 4th. he's
> going to check the linkage and other external stuff this afternoon and
> if that doesn't fix it, he'll have to take the tranny out again and dive
> back into it.
>
> has anyone experienced this before with a rebuilt tranny? if so, is
> there anything i should tell my mechanic to look for?