MKIII Supra clutch type LSD?
 

Anyone think of doing this? The 87-89 Supra came with a clutch-type 1.5 way LSD. This can be more desirable to some than the torsen LSD.
I've read that a FRS LSD has been swapped into a Lexus is250. Then i found that the is250 and is300 share the same pumpkin. The supra LSD works in the is300 pumpkin.
So the MKIII Supra LSD should fit, right?

Why not purchase an clutch type LSD meant for our cars, any part from a Supra is going to be pretty old by now.

^^ That would be my opinion too. By the time you buy a used (and old) supra LSD, then rebuild it it'll probably just be cheaper to buy a brand new cusco or kaaz diff meant for our cars.

Seems like rebuilding a $100-$200 used lsd would be way cheaper than buying a $900+ new lsd.

I was just throwing the idea out there.

Sorry for the off-topic: but the thing I would love to know...which exact Lexus IS pumpkin, that can directly swap with an FRS, comes with an 4.56 FD, and how to identify it (car model or serial number, etc.).... short FD upgrade on the cheap(junkyard), if it exists.

Don't do it unless you're drifting. Torsen diff is much more advanced and actually handles better (it's also more expensive than a clutch type to make, hence why they were upgrades for the Supra)


Rebuild kit is cheap.


Yes, and those same cusco or kaaz diffs were originally made for the Supra :) They're also not really much better than a factory one that's been rebuilt with better clutches and springs.


Yep, definitely cheaper and just as effective.


Still, wouldn't do it, the torsen is a far better diff unless you're dedicated to drifting.

^^ That's not entirely true. Clutch diffs work better in a lot of other situations too. Most track junkies prefer clutch LSD's over Torsen LSD's as well.

If you get a wheel in the air with a Torsen diff it behaves like an open diff, which gives you no power to accelerate out of a turn (or into a driveway).

The big benefit to a Torsen is that they have a much longer lifespan before needing major service.

Helical LSD that can handle 1000hp for these cars are 700$

Hey Poodles! How's it goin.


I'm sure there's some member that might find this info useful for a cheap drifting LSD.
If you're not one please don't argue that a new one is better. Different strokes for different folks.

So then you get one of the Torsens with clutches in them to offset :) Or have a nice complicated traction control system that uses the brakes to achieve the same goal :)


The main advantage of the Torsen is in it's name: Torsen = torque sensing. It actually helps you turn instead of fighting you like a clutch based LSD will.


It's funny, the MKIII Supra guys were looking at getting the better Torsens out of the IS because the MKIII specific one (JDM Twin Turbo R with a 1JZ) is a first generation and known to be weak.

@Jeff Lange

Has numerous, informative posts on this. Including part numbers.

Maybe do a search with his user name and lsd related keywords.

Yes, Jeff is well known by me :)


*waves at Jeff and Kotu100*

Supramania?

He's already posted up some really detailed information here on diff interchange between Supras, IS and 86s.

Yep, Supramania (same screen name there as here :) )