S52 Swap: Diff Question

[M3RIPS]

I searched this forum for answers but some of the related posts went on tangents so I'm posting a new one specific to my situation:

1. I'm doing an S52 swap to an E30 M3. I have the entire 96 E36 M3 5-speed donor car.
2. My E30 M3 is missing the differential and axles.
3. I think my stock E36 M3 driveshaft can be used but I don't know which diff to purchase. I do not have any extra input or output shafts from the E30.
4. Considering that I will be getting a new differential, which axles to buy?

Thanks in advance.

[Roysneon]

Does the e36 driveshaft have the 4 bolt rear flange? If so you can use that with the e36 trans. Get a medium case E30 differential with the 325/m3 e30 axles.

[Poeman446]

Im about to do the same thing. I have a 3.73 medium diff, and the 3.23 e36 M3 diff. Can i swap the internals from the 3.23 into the E30 diff relatively easily, and use the E30 ouput flanges as well? I saw something about it, but nothing definite. If nothing else, Im going to go with a 3.15 diff from an E34 or E28. I cant remember which.

[Wanganstyle]

E30 body = e30 rear subframe = e30 rear iron case diff.

the E30 188mm iron case is shared with e36/7 (z3), e28, e24, e23.

e36 sedan/coupe use a different case.
e34/32 use a different case

e30M will want e30 188mm CV shafts and 188mm e30 diff and e30 diff cover.
E30 CV shafts are 84mm cv diameter; stubs must match also.

e30M shares these above parts with 325i/e usa: iron diff case housing, 25% zf lsd, 188mm ring and pinon 4,10 (same as any automatic 325), cv stubs and axles

diff case you will need a 188mm e30 diff case; internals can be fitted from the e36 188mm.

ring and pinions and LSD units interchange;
all e30/36/32/34/28/24 188mm diff internals interchange;
E36M cars have M14 bolts on ring gear and LSD clearance holes for M14.

[Poeman446]

^^ Differential Genius. I've seen your previous posts.

[E30FreaK89]

i was trying gto figure out if the gearing could be interchanged between the cars. This helps big time! thanks