My bud from AU suggested 915 tranny, which is not that expensive in US.
Can be found on 1972-1983 model 911 cars
w/ 5 speed, 8/31 ring & pinion.
Same gear ratios as 1975 915-40, 1976 915-44, 1977 915-60 & 915-61, 911 transmissions!
The 915 gearbox was derived from the 916 unit which had been built for competition in the 908 racer.The 915 made its first appearance on a 911 in '72 with the 2.4 liter engine which had 8% more torque than the previous 2.2. The 915 is a fine competition gearbox; light fast and accessible. Just look at it's racing record - all the 911's successes from the seventies and eighties.
So I have my SBF drive train ready....Ford 331 stroker with aluminum heads and forged internals, aluminum intake with a Holley (for now), stainless steel shorty (block hugger) headers....all mated to a Audi 016 with a porsche 944 LSD installed by way of a Kennedy adapter plate.
Next step is to remove the Lotus engine and transaxle....
How much torque are you shooting for? Have you considered 01e ? Which one is shorter?
Any Audi 5000 from 84-87 two wheel drive trans are all the same.found out, the 5000s and 5000s turbo are the exact same transmissions. I talked to a local performance transmission shop and they feel the audi 5000s transmission if cared for is good for about 450 to 500 hp.
interesting thing is that they used the Audi 5000 S Turbo transmission. As it comes from a front wheel drive you do not have to flip the diff over
The Audi 5000 transmission that the 5000s and 5000cs have different final drives. s=4.11:1 and cs=3.89:1
The 016 boxes have the selector shaft on the left hand side, all other boxes have the shaft in line out of the back of the box.. The CV joints used on most (UK) GT40 replicas are from the Ford Granada and the output shafts on the Audi type 013 transaxle have mountings to suit. The Audi type 016 has output flanges to suit similar but slightly larger diameter CV joints which could be adapted for use with the smaller CV's if necessary or better still to use as standard with larger diameter drive shafts.