[Massive Type IV]

The 930 Turbo had a 4 speed.......reason was it had so much torque that it did not need a 5 speed....Same with a TIV.

A Porsche gearbox is a hellacious conversion and still has a weak 1st gear...for twice as much money ATLEAST!

My tranny's are set up for a TIV to bolt directly to them and have a few little things that makes it even easier like the correct length operation shaftand most of all the gearing you need for your tire sizes and engines powerband.