wheelsmithy (Joe-with-an-L)
wheelsmithy (Joe-with-an-L) GRM+ Memberand PowerDork
1/29/23 10:35 p.m.

So, internet sleuthing has led me to the rumor that S2000 torsens are the exact same as NA/NB miata torsens.  Do they actually just bolt in in place of, let's say a stock automatic NA open differential? Axles fit? Spline count the same?

You are an enterprising group with many answers. Is it true? I ask, because we seem to be in some confluence of reality where S2000 diffs are cheaper than miata diffs. Who knew?

GameboyRMH
GameboyRMH GRM+ Memberand MegaDork
1/29/23 10:48 p.m.

Found a post here saying they can be swapped in but you need Mazdaspeed axles:

https://forum.miata.net/vb/showthread.php?t=161418

Someone implying they've run an S2k diff in a Miata?

https://www.miataturbo.net/suspension-brakes-drivetrain-49/miata-torsen-vs-s2k-torsen-46105/

Someone else trying to put an S2k diff in a Miata, couldn't find MSM axles, looked into S2k axles but they're different:

https://www.reddit.com/r/Miata/comments/vw88xz/s2000_diff_on_miata_na/

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