Yeah this Transmission thing took me a while to figure out. It turns out again there have been plenty of different transmissions and even more possible swaps. But let’s start with this: Why do People swap Transmissions? There are three main reasons: – American guys running lame US-Spec 4-speed Manual or Auto transmissions – People doing High-power engine swaps where the OEM 5-speed is too weak – No Spareparts available for the original EU / JPN / AUS Spec 5-Speed Since the FS5C71A seems to be one of the most desireable original early gearboxes of the Z-Chassis (Porsche style “competition” steel synchros, 5-speed and all…) i would like to keep…