Using a 901 w/3.2-Any Problems? Options

[ellisor3]

I am about to install my 3.2 engine and it is being paired with the 901. I was wondering if the 901 need to be regeared or use heavier gears for this application or is the standard gearing fine?

Any other things that should be considered?

It will be for street only.

[john rogers]

No one has mentioned adding a trans lube and cooler system to your conversion which will surely prolong the life of a transmission. Street use and racing are completely different animals as road racing puts a huge amount of stress on the gear box which is why many go with the lube system and plan a 901 overhaul each winter. You can use a 904 input shaft and run the much higher 1st gear (actually 2nd) so you will get a real usable 5 gears but that will cost as much as your engine probably? Many of the vintage racing 2L Porsches ran a 901 box with limited slip and they were putting about 200 HP to the rear wheels and a tranny would last about 2 years max and need an overhaul. If the engine jumped up to a 3.2 or 3.3 and had 275 rear wheel HP then the trans might only last one year max. A 915 box would last about two years racing but then need an overhaul and in the end over a 5 or 6 year period total cost was the same! For street use the 901 should do fine as long as it is like new inside, shifted easy, use a Rennshift
and don't do burnouts!