Originally Posted by
Martin-Hadland
As far as I'm aware the 32/33 share the same ratio which is something like a 4.2, the R34 is in the high 3s I think. I'm using an R33 gearbox so either would do but obviously I need to think about the rear matching. I know they're integral to the sump, I have built a few but never measured the sump or cwp size. Your other option is in my mind too. I'd be interested to see how big a BMW X5 front diff is because that shares the same ratio as a Cossy!
Theres a Lambo Gayardo front diff on ebay for £1600
I'm pretty sure the front diff of an R34 is 3.54 or 3.45, somewhere there. Thats what my mate bought for his standstill project. the R33 etc would just be far far too short for any useful top speed.
On that basis, it would just make sense to use the F/R diff from the same vehicle.
Subaru 6 speed would be no use as it's a transaxle design, mating front shafts to the wheels would be very difficult, Subaru engine sits quite far forwards and can do because it's short.
Audi's manage it too, although they're very long nosed cars.