Gearboxes

[Chris KC]

Simon one of the problem with the 3syncro 4spd box is the 1/2nd syncro hub can over throw and the balls and springs jump out and jam the
         hub and you cannot select or deselect 1st or 2nd gears the 2syncro box does not have this problem.
Terry.

Been there, done that! You do have to be careful assembling things to avoid that happening. 

I think the question is if you have a working box is it best to leave it untouched (maybe just give it clean oil) because I am sure once you open it up to start replacing things like balls and springs you'll find other things that need doing too (layshaft end float, inter shaft bush and so on).

Simon

It's the end float that's the killer. If you have a load of axial slop, fix it.