I am just wondering because maybe it will be cheaper to buy a used FD LSD that to rebuild my S4 LSD. So will it fit in to my car. And also what is the difference between an FD and FC LSD??

 

bump

 

Oh by the way I'm going to keep bumping this until somone says yes or no.

 

I dont know the answer, can you cross reference the dimensions of the diffs and then from that determine if they will bolt up.... if they dont bolt up you can always do some riggin..

 

I don't really know if from teching would hold up in a differential.

 

from what i understand, the Torsen diff unit in a FD rear end can be installed into the FC diff housing, you can't simply swap the whole rear tho.

I am definately looking forward to doing this myself.

if i am wrong please lemme know

 

Well if this is so, it must be better than the worn out clutch type that is in my car.

 

ive heard the same, and yes, torsen is much better than a worn out clutch unit

 

I'll do a search but if anyone just wants to be a post *****, what is the difference between a torson and a clutch type.

 

the difference between a clutch diff and a torsen diff is the following:

torsens distribute torque to each wheel by means of a geared mechanism, and the distribution is instantaneous-- in other words, if something happens midcorner, it will not react in half a second or a second, it will be instant.

clutch type diffs distribute torque by means of metal clutch plates that contact with each other. there is a slight time delay for this reaction to take place, so it's not as smooth as a torsen. for road racing, torsen is considered much better, but clutch types are considered much stronger for dragging. from what I understand, clutch diffs wear out much easier than torsens, which can only wear out really by breaking.

viscous diffs are the worst, they are the slowest to react by far and are only really useful for snow/ice conditions, stock cars, etc.

 

Thanks a bunch FCdemon.

 

that pic might have been funny the first time but now it's just getting really old.

 

haha..i bet 56ker's love it...

 

Seriously man, your sig is too big.... Takes up half my screen

 

yes it will work... only on turbo diff housings.

you may need to get different sized half shafts...i can't remember.

 

You can implat it into a T2 housing, if you want to swap in a torsen into a NA, steal it from a miata.

 

Yeah Yeah I know I have to take that sig off, but did miata's come with torsen differentials??

 

Wouldn't of said it otherwise! Icemark was explaining this a little better not too long ago, you can search and dig it up if you wish

 

Did all miata's come with torsen differentials, if so I'm going to go steal one out of this kids miata that I don't like, hehehe.

 

I don't think so, I think only the ones after 94 or 95 did.

 

94+ had the torsen LSD, the 1.8 miatas. And not all of them did. From what I understand, if it is a 5-speed and has cruise control, it should have a LSD. Other than that you may have to do a vin check and get the factroy options to know for sure. I heard this from the guys at www.miataforum.com

*edit*- Also, what all in involved in swapping a LSD unit? Can you just crack open the case, pull it out, put a new one in, then close it back up?? I searched for a write-up and couldnt find anything...

 

it has to have the A or B package. almost all LS miatas have LSDs. go to miata.net you'll fine out which have it and which don't.