FC Torson unit is a GSL-SE
 

I keep seeing these Torson units for say and I was wondering if I coult fit one into a GSL-SE. I think they have the same axle spline don't they? What do you think?
Here is a link to the FC Torson - Helical Gear LSD - RX-7 RX7 FC3S in the USA
Tame that 13B Turbo with a TORSEN !

I C no linkey.......

Ja, there isn't a link.

Its a secret link, only meant to tease us.....

Search for Miata Torsen. FC uses long pinion, no go. Nuff said.

Ok, so how abouts this
 

Is there enough material on the FC one to chuck it up in a lathe and cut it down to fit the SA/FB ??

anybody no the outer diameter/taper of the shafts (both SA/fb and FC ? if there is enough material left I would think that it could be lathed down to fit.

just a though

Ken

Stop and think about what you said for just a split second..... how does a long pinion gear have ANYTHING to do with the torsen unit itself???

The LSD/torsen differential unit is swappable from an 84-85 first gen, all non turbo FCs, and the 7" ring and pinion miata.

Although the non turbo FC uses that long pinion gear, it still uses a 7" ring gear wich allows it to swap over

Where you have to be carefull, is that the Turbo fc, uses a larger ring gear that doesnt allow that lsd unit to swap over

yes this can be done,

I have one in my garage.

the Miata tosen/helical unit is a bolt in into any of the 84-91 N/A carriers.

in a couple weeks, i'll be putting the torsen unit into a GTUs diff I have, for a friends RR car

:doh:

Now I feel like an asshat... The Miata to S3 FB swap is either a diff swap, gear set swap, or complete pumpkin swap... Where as it was a diff swap only on the FC...

My mistake. :dunce: