128i -> M3 Rear End Swap

[underwatervans]

Hey Folks,

Okay well, my 128 rear subframe is extremely rusty... I have a source for a local complete m3 subframe from a manual m3 and I know the subframe and all should be interchangeable. The big question is what drive shaft am I going to have to throw in there? And is there any more than the shaft that needs to change?

I'd love to do this and kill three birds with one stone ( fresh subframe, LSD, higher gearing at 3.85...)

Thanks in advance