Are Torsens transferable?

#1

I have a diff from a Honda S2000, which have Torsen units in them. And I have an E30 with an open diff. Does anyone know if the the Torsen from the S2000 would fit in the E30 carrier?

From looking for info I understand there are three types of Torsen’s, but that relates to the internal workings, not the outer dimensions or in what they will fit.

Thanks.

#2

I doubt,
Here are a couple bullet points:

  1. Torsens are not spec legal. (I asked)

  2. Physical dimensions: Ring gear bolt pattern, half shaft spline count, height of diff, machined surfaces for bearings.

I am aware that for example R200 family diffs can be found in a lot of places, but it’s between Japanese cars. I have no past experiences with swaping german diffs between manufacturers. Please share your part numbers that you think could fit.

#3

Thanks, mainly setting the car up for vintage racing where rules are more lax, but otherwise spec E30 legal.

Apparently most Torsen’s have small differences that make them non-compatible between various car makers.

Cheers,

#4

The torsen from a Z3M fits in the E30 diff without modification. I replace the 3-disc LSD in my vintage race car and now it has much better turn-in. Not sure what effects (if any) that’ll have on lap times.

#5

Thanks for the feedback, picked up a regular lsd for now. Cheers.