Nope it's Open DIff, but from my understanding, TRD LSD Auto will fit SC300/400, there are few 400 on the forum running them, do a search to find out who and you can pm them for more specific information.
you say "you can PM them for more specific info" .... what does PM mean ?
Why don't you use the entire pumpkin? I have a '95 SC300 also and I want to go with a LSD. I was trying to double check to make sure that the pumpkin from a Supra TT is a direct bolt on and what the gearing is so I make sure I buy the right thing. Don't mean to hijack your thread but I'm looking for the same basic info. Any help is appreciated.
when you say 'pumpkin' what exactly are you referring to ?
It's not the LSD that dictates the gear ratio. You can install a LSD in your stock pumpking and still retain your gear ratio. For example, I have TRD in my SC300 pumpking and still have the same gear ratio of 4.27. YOu have to change the ring gear to change the ratio. LSD is just away of getting the power to the wheels.
Some correct me if I am wrong., below are the gear ratio for some lexus and toyota cars. Thank you search function.
If you swap out the whole rearend (pumpkin) of your car with a supra or SC400, with LSD installed then you will have a different gear ratio. But just dropping the LSD in the stock pumpkin. No change, just more grip.
From Lextreme's forum
1993-1998 Supra TT manual - 3.133 (torsen)
1998+ Lexus V8 Cars VVTi - 3.266 (open differential only)
1990-1997 LS400 - 3.62 (open differential only)
1993-1996 Supra TT auto - 3.769 (torsen, 3.77 not the usual 3.76 quoted)
1997-1998 Supra TT auto - 3.769 (open standard, torsen available)
(auto sc300 pumpkin) so how do u swap the rear end and keep the stock auto tt gear ratio wanna have the auto tt gears...
would it be more cost effectly to just buy a whole working auto tt pumpkin
yes that would be the most cost effective way, cause if you cant do the work yourself then you have to pay for the LSD intall. The problem is, the Supra auto TT diffs are getting kinda scarce. If you find one for sale there anywhere from 500-900 plus shipping. Kaaz lsd on eaby 800.
Texas Motorplex 3/27/15
13.16 @ 110mph bone stock.