I have a problem with my 156: the gearbox !
It has been replaced under warranty a 30000km because there was a failure with the syncromeshes (crrrrakkkkk when I go from 3 to 2). Now, at 70000km the problem is back.
What can I do, how does it cost to fix this kind of problem ?
Have the gearbox fixed. A gearbox on a car that new, will be pricy at the salvage yard.
You will have to pay for dismounting/mounting the gearbox anyway, and a few hours of labour plus some gaskets and a new syncring will be cheaper. And consider that you know your current gearbox and how its been treated, you dont know squat about a used one.