I need to do an 01M-ectomy on my 2001. I hear some people install MK3 5-speeds, because they have better 5th gear ratios. I'm considering installing an MK3 trans instead of an MK4 trans in place of my 01M.
I know the axle flanges are different, but what else do i need to know? is everything else identical? flywheel & clutch, which do i use? MK3 or MK4? clutch fluid line? MK3 or MK4? Trans mounts? MK3 or MK4? Any problems with the MK4 shifter bolting up to the MK3 trans? any other potential problems that i should know about?