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fixable with lots of aftermarket pieces
Could you elaborate on this please? Specifically for a T5.1 6 speed box from a 140ps? I’ve had no problems but if you think it’s likely, what fails and how can the box be improved?
freddo-
Check the T5 forums (UK) lots of info, a few companies making parts for them, one issue is there is a bearing support that protrudes into the bell housing and they are known to crack or develop play in that bearing, massively affects 5th and 6th before anything else though. I think the original cv shafts are inherently weak, not sure if vw fixed that with the face-lift vans, I hear a lot of people have wobbly cv joints, can cause a lot of damage if they are left to go all the way to failure
BrickMan
T5 have a gearbox made from rejected air fix kits, think it's from a polo no joke. T4 are much better, both are fixable with lots of aftermarket pieces.
The merc boxes feel very solid, but every one I've used (mostly buses and light truck bodies) all the linkages are shot so you are just guessing and hoping that what you have selected is the next year and not somehow reverse