Why wont my kombi change from 1st to 2nd to 3rd. Could the vaccumn have anything to do with it?

Help needed. Why wont my kombi change from 1st to 2nd to 3rd when in drive? Its ok in 1st and reverse. It appears that the hose from the vac unit wasnt connected to any thing,. Could this affect things. ? If so where does it hook up to?

the hose hooks up to the vacuum modulator on the side of the gearbox. Yes this will effect the changing push it on n tie or clamp it on so it wont fall off. The modulator should be a round thing sticking out with a 1/4 inch tube hanging off it where the hose is to be hooked up,

Make sure its clean as well.

thanks for that, but it is the other end of the hose thats dangling!

OK it goes either on one of the carby manifolds or the balance line between the carbies. once again clamp it or use a zip tie to secure .

Cheers. thanks for that. I recently bought the bus having been told by the lady that the gearbox stopped working. Looks like I might have pulled out the donk for nothin?

How important is the kickdown switch on the accelerator pedal. Coz its rooted too!

well if it dont work then the box wont kick down a gear when you hit the accelerator... n it will just hammer away you can manually pull the shift lever to lock it back a gear for hills but it will stay there and not shift when needed.