Did I just purchase the right lsd for my 96 sc300 5sp?
01-05-15, 03:52 PM
#16
You might be right 
. Some people do not know the value of their stuff. But be careful that indeed it is a true 6 speed MKIV differential. I have also seen on ebay a diff with descriptions saying "from 6 speed MKIV but not LSD" .
There is also a difference between the JDM 6speed differentials that has a 200 ring gear and the USDM 6speed differentials that has a 220 ring gear. The JDM has a 3.26 gear ratio and the USDM which is much coveted, hard to find and for which they want an arm and a leg has a 3.13 gear ratio.
Those LSDs floating around that had been taken out from USDM diffs cannot be installed on JDM pumpkins. Since USDM pumpkins are hard to find , reason I said , it is kinda useless buying a USDM 6 speed LSD (internals only) . They have been taken out for a reason... replaced with an aftermarket one.
. Some people do not know the value of their stuff. But be careful that indeed it is a true 6 speed MKIV differential. I have also seen on ebay a diff with descriptions saying "from 6 speed MKIV but not LSD" .There is also a difference between the JDM 6speed differentials that has a 200 ring gear and the USDM 6speed differentials that has a 220 ring gear. The JDM has a 3.26 gear ratio and the USDM which is much coveted, hard to find and for which they want an arm and a leg has a 3.13 gear ratio.
Those LSDs floating around that had been taken out from USDM diffs cannot be installed on JDM pumpkins. Since USDM pumpkins are hard to find , reason I said , it is kinda useless buying a USDM 6 speed LSD (internals only) . They have been taken out for a reason... replaced with an aftermarket one.
01-05-15, 06:11 PM
#17
You are right 
.
For a summary of Differentials here is a good thread from SF
http://www.supraforums.com/forum/sho...rential-Info!&
.For a summary of Differentials here is a good thread from SF
http://www.supraforums.com/forum/sho...rential-Info!&
01-05-15, 11:37 PM
#18
I could be wrong myself but I thought the JDM Supra TT 6-speeds came with 200mm 3.26:1 LSD differentials standard. The USDM/UK spec TT braking system was also optional from the TRD catalog and not a standard feature on the JDM cars.
The 220mm big LSD diff might have been similarly available from TRD Japan. The USA and UK were the only markets that had it standard on 6-speeds. Or anywhere else the MKIV was sold for official export.
The 220mm big LSD diff might have been similarly available from TRD Japan. The USA and UK were the only markets that had it standard on 6-speeds. Or anywhere else the MKIV was sold for official export.
Last edited by KahnBB6; 01-05-15 at 11:40 PM.
01-06-15, 04:31 AM
#19
I could be wrong myself but I thought the JDM Supra TT 6-speeds came with 200mm 3.26:1 LSD differentials standard. The USDM/UK spec TT braking system was also optional from the TRD catalog and not a standard feature on the JDM cars.
The 220mm big LSD diff might have been similarly available from TRD Japan. The USA and UK were the only markets that had it standard on 6-speeds. Or anywhere else the MKIV was sold for official export.
The 220mm big LSD diff might have been similarly available from TRD Japan. The USA and UK were the only markets that had it standard on 6-speeds. Or anywhere else the MKIV was sold for official export.
Since the 3.13 gear ratio USDM diff is hard to find and expensive, if someone wants to get near that gear ratio, the best way for me to do it is purchase the following for around $320 shipped
98-00 Lexus SC400 (5AT trans, VVTi)---- 3.266:1, open, small diff, big flange
98-00 Lexus GS400 (5AT auto)---- 3.266:1, open, small diff, big flange
02-05 Lexus SC430 (auto)---- 3.266:1, open, small diff, big flange***
Buy the TRD LSD internals for Auto Tranny and swap it into the above mentioned diffs. You get near near the 3.13 gear ratio of a USDM diff and yet you have a lot stronger diff. And the best is the amount you spent is like or less than a USDM 6 speed diff with a torsen lsd. Exactly the reason why MKIV guys take out the torsen lsd and swap in the TRD lsd to make them stronger.
Having had the opportunity to own cars with 3.13 and 3.26 gear ratio diffs, I doubt whether the average driver will even notice the difference.
01-06-15, 08:42 AM
#21
Lead Lap
There is also a difference between the JDM 6speed differentials that has a 200 ring gear and the USDM 6speed differentials that has a 220 ring gear. The JDM has a 3.26 gear ratio and the USDM which is much coveted, hard to find and for which they want an arm and a leg has a 3.13 gear ratio.
Those LSDs floating around that had been taken out from USDM diffs cannot be installed on JDM pumpkins. Since USDM pumpkins are hard to find , reason I said , it is kinda useless buying a USDM 6 speed LSD (internals only) . They have been taken out for a reason... replaced with an aftermarket one.
Those LSDs floating around that had been taken out from USDM diffs cannot be installed on JDM pumpkins. Since USDM pumpkins are hard to find , reason I said , it is kinda useless buying a USDM 6 speed LSD (internals only) . They have been taken out for a reason... replaced with an aftermarket one.
01-06-15, 09:10 AM
#22
What I actually meant all along in all my posts on this thread is "the USDM 6 speed lsd which people take out and sell for so cheap which is 220 mm ring gear cannot be installed on JDM 6 speed diff with 200 mm ring gears." .
01-07-15, 12:51 AM
#23
^^ This solves the mystery. It was a mid-cycle change for the car, probably coinciding with the 2JZ-GTE's VVT-i upgrade. So Japan did get 220mm diffs standard for the first few years.
Also, the OP hasn't stated whether or not he will be turbocharging. If he won't be, the low 3.26 ratio isn't going to be very peppy without more power. There is also the 3.77 pumpkin from a TT Auto.
Also, the OP hasn't stated whether or not he will be turbocharging. If he won't be, the low 3.26 ratio isn't going to be very peppy without more power. There is also the 3.77 pumpkin from a TT Auto.
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