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Hello, I've been working on my project for a while now and now that I've got it running I need to get an lsd. I was just wondering what lsd can I use with my sc300. I have a 2jzgte vvti with a w55.
First off I would highly suggest you upgrade from the W55 transmission. It is known to be very fragile even compared to the W58. An R154, CD009 or Tremec Magnum are good alternatives that can reliably hold good power from a turbo JZ.
As for LSD's, the common MKIV Supra TT Auto Torsen T-1 LSD (which comes in a 3.769:1 ratio pumpkin) will fit. The driveshaft companion flange has to be swapped over (follow TSRM procedure for that to preserve the factory ring and pinion alignment) and most of the time the SC axles swap right over but occasionally TT Auto axles may be needed for some year differential pumpkins.
You can also get a similar setup by taking an SC400 3.92:1 rear diff and having it rebuilt with a Kaaz, Cusco, TRD 200mm LSD (discontinued but out there) or a pricey OS Giken LSD. All of those except the OS Giken are 2-way clutch type only. OS Giken sells a 2-way and a 1.5-way which is still clutch oriented but very durable.
Lastly, there is the unicorn Z30 Soarer Torsen T-2 LSD which was JDM only. Rarely seen in the USA unless already part of an imported Soarer.
First off I would highly suggest you upgrade from the W55 transmission. It is known to be very fragile even compared to the W58. An R154, CD009 or Tremec Magnum are good alternatives that can reliably hold good power from a turbo JZ.
As for LSD's, the common MKIV Supra TT Auto Torsen T-1 LSD (which comes in a 3.769:1 ratio pumpkin) will fit. The driveshaft companion flange has to be swapped over (follow TSRM procedure for that to preserve the factory ring and pinion alignment) and most of the time the SC axles swap right over but occasionally TT Auto axles may be needed for some year differential pumpkins.
You can also get a similar setup by taking an SC400 3.92:1 rear diff and having it rebuilt with a Kaaz, Cusco, TRD 200mm LSD (discontinued but out there) or a pricey OS Giken LSD. All of those except the OS Giken are 2-way clutch type only. OS Giken sells a 2-way and a 1.5-way which is still clutch oriented but very durable.
Lastly, there is the unicorn Z30 Soarer Torsen T-2 LSD which was JDM only. Rarely seen in the USA unless already part of an imported Soarer.
Thanx! Helps a lot. So I can just get a complete mkiv TT Differential?
Yes, as long as it is a MKIV TT Auto differential which is 200mm just like our SC differentials. All of those are 3.769:1 ratio.
The 3.133:1 220mm MKIV TT 6-speed rear LSD diff will not work as a direct bolt-in. That requires a complete MKIV TT 6-speed rear subframe swap and a transmission suited to the gearing.
The MKIV TT Auto LSD diffs come up for sale occasionally in the CL SC300/400 classifieds and more often on the Supraforums classifieds. They go VERY quickly once listed since they are in such demand. Average price for one is about $1000-1200. The 200mm compatible Torsen LSD centers are usually about $600 but you rarely see them separated from the pumpkins.
FYI, when purchasing one it is common for the seller to provide a picture of the inside of the differential with the rear aluminum cover removed to show that a Torsen LSD is actually in there. This is because 93-96 Supra MKIV TT Autos all came with LSD's standard but in 97-98 they were optional on TT Autos, meaning some of those 97 or 98 rear diffs came with plain old open differentials. Not all but some. There is no discernible visual difference between the 93-96 and 97-98 TT Auto pumpkins. Also, unlike clutch-pack type LSD's Torsen T-1 LSD's act like open differentials unless they are put under load from the engine (driveshaft) so the visual confirmation method is the best one.
08-23-17, 09:05 PM
93 sc300 2jzgte "Which lsd can I use"
