Septembers

I searched and didn't find what I was looking for. I was wondering could you buy an aftermarket lsd and install it on a non lsd rear end. I have a 85 gs and I'm having no luck finding a gsl lsd pumpkin anywhere locally. And I don't really want to switch to a -se rear end. So is it possible to just install an aftermarket lsd?

speedturn

iTrader: (1)

Your best value for your money would be to keep searching for a used stock GSL or GSL-LE differential.

kenn_chan

a pumpkin is a pumpkin, just make sure that the axle sizes are the same. I could be wrong (and if so somebody correct me) but I think you have three major variations of the 1st gen axles.... 110 x 4 shorter and thinner 114.3 x 4 shorter and thinner, and 114.3 x 4 thicker and slightly longer (GSl-SE) yours should be the 114.3 x 4 non gsl-se if so any 114.3 x 4 axle shares the same pumpkin hence easy enough to swap. check with trochoid, and wacky they both have encyclopedias between their ears vice brain matter

kenn

Siraniko

iTrader: (13)

pre-83 came with 24 splines while the 83+ have 26 so he can only use 83+ 3rd member. (sorry, i cant remember the actual # of splines).

Rogue_Wulff

Since you have an 85, you're in luck. A Miata pumpkin will bolt in, and the axles will fit right back in place. The Miata was available with the same 3.90 ratio, as well as a 4.10. But, not all had a LSD.

Kenn- All US spec 12a cars had the 4x110 pattern, only the SE used the 4x114.3.

Wacky- I thought the 83 still had the smaller axles? Maybe it was a mid-year change?

Septembers

Does it matter what year miata? I'm making a trip out to a local junkyard tommorow to pick up a few odds and ends for my car. Did the miata's come with a torsen lsd stock or was it viscous. I'm pretty sure they switched to larger axles halfway through '83.

trochoid

iTrader: (6)

All 83's are small axle, it was the pinion flange that changed mid-year. Some of the roadracers swear by the small axle rearends as being an overall stronger unit. Something about the narrower axles tubes are actually stronger and deflect/bend less.

On Felix Miata's web page, he has a comprenesive list of which diffs can be swapped into the 1st gen rearends. The torsen unit is limited to a particular model and narrow production year range. There is also an issue of total spline engagement.

Thanks for the faith Rouge, but I still need to look a lot of **** up. Memory and age no longer compliment themselves, LOL.

Rogue_Wulff

I know the feeling...............
Age does a couple advantages, though. Cops don't harrass us as bad over our loud cars. I guess they figure we can't hear very well anymore.............

Siraniko

iTrader: (13)

you failed to mention that he gets a senior citizen discount at Denny's also.

Rogue_Wulff

I knowed you or doc would be along soon. Besides, I'm still working on my 1st cup of coffee.