|
Whilst it is possible you've got a vacuum issue I don't think that that will stop it from shifting past first gear.
Saying that though I did buy a gearbox from a chap in a McDonald's car park (eeeek!) who was whittering on about a a dodgy T joint that caused shifting problems - I didn't believe him though - neither did I believe that the gearbox had previously been driven by a Nun and that she'd only driven 80,000km... but then you never know eh do you?
As far as I am aware the vacuum does the smoothness of the shifts.
1980 - would probably mean you've got a 722.1
In this gearbox the first gear is "held in place" with the B2 piston + brake band and the free wheel brake. If you are actually in first gear and the B2 parts aren't working you'd also loose drive in 2 and 3... but if you have first then it isn't that.
Before I drone on about other stuff - have you done the obvious and checked the fluid level / replaced with fresh fluid / filter etc?
|