'99 Miata torsen in a '94 housing?

AlexMaier · **Posted:** Mon Jun 30, 2008 10:53 pm

So I have been looking for a 4.3 torsen to put in my 99 Miata, and posted on miata.net...

I have been offered one at a price I think is reasonable, but now some dubious details have come out and I am not sure it's worth it. Here's what the guy wrote to me:

Quote:

The 99 came out of wreck, so one of the arms was broken. The 94 case was good, so I stuck the 99 diff in the 94 case. I replaced the two axle seals.

It's ready to bolt in. The cases are basically the same. I had already cleaned up the 94 case and semi-polished it. I even put new axle seals in it.

I seem to remember that in a '99+ Miata open diff to LSD would have been a direct swap, but that in NAs the torsen came in a larger housing and required a swap of the half-shafts and possibly even a different drive-shaft.

I am looking to have to buy (and install) as few parts as possible, and this sounds weird/sub-optimal to me. What do you guys think?

Ryan Holton · **Posted:** Tue Jul 01, 2008 7:38 am

The 94 case is the same as the 99 case for all intensive purposes.

Its the wimpy 90-93 cases with the 6" diff that are different. You don't want one of those (although it bolts in as well)

Sanford + 13x8's with V710's + a "spirited launch" =

PhilFausz · **Posted:** Tue Jul 01, 2008 6:46 pm

I've seen that kind of thing in my days of rock-crawling, it was quite frequent as a matter of fact. Usually more the result of the driver than the equipment. Of course, that wasn't your case, was it Mr. Destructo?

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'99 Miata torsen in a '94 housing?

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