sc300 rear diff ?lsd
12-02-13, 12:04 AM
#16
Either 3.769 or 3.916 should suit you well. Less than 3.769 isn't good for 5-speed transmissions. You could technically stay with the 4.083 ratio that is in your car already and buy a TRD 2-way LSD for that but it's a toss-up as to whether or not that will feel too short on your setup or not.
From my research, 4.083 is only beneficial for 1JZ stock/BPU cars (since it's a stock ratio for ALL Soarer 1JZ 5-speeds). 2JZGTE's don't rev as high, and they have more displacement and power at lower RPM.
12-02-13, 08:53 PM
#18
I'm lucky enough to have the TT 3.76 LSD in my '99 sc400, it's one of my favorite mods done to the car. It really brings the car to life and gets rid of the 'old man luxury' feel SC's have when stock. It does hurt a bit on gas though, but that's more probably a result of my Right foot having fun 
01-03-14, 09:30 PM
#20
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Did any sc's come stock with a LSD? I tried the floor at trick in my stock 93 sc300 and it repeatedly flung both the left and the right floormats(I guess rubber doesn't help traction)
03-16-15, 01:16 PM
#21
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Has anyone tried welding there differential ? Stuck with the 1leg tryna hit donuts n slide for a daily how good would it be if I did weld it? I have a 92 sc300 5 speed
03-17-15, 06:40 PM
#23
^^ Welding is not recommended. You can do it but don't expect it to be anywhere near the same level of quality, drivability or longevity as any non-welded open differential or any LSD be it a Torsen or clutch-type.
Last edited by KahnBB6; 07-03-15 at 12:38 AM. Reason: Grammatical correction
07-03-15, 06:40 AM
#25
Just to note for the OP, the factory / stock GS400 differential did NOT have an LSD. It seemed that people were suggesting the use of one in the SC but did not mention that you still need to swap the gears. What they are saying is that the 'pumpkin' or body will fit. I think there were TRD gears sold separately, but these were likely Supra parts. I'm not sure.
Do not weld, they eventually break after hard use or poor welds, may start to make noise, and wear out tires.
Do not weld, they eventually break after hard use or poor welds, may start to make noise, and wear out tires.
12-26-15, 03:39 PM
#26
This probably has been discussed several times. And, I do apologize in advance but I'm curious and want to be educated. How come the earlier model Supra(MK3) LSDs wont work on the SC? If the pumpkin wont fit, has anyone tried swapping the internals? The auto TT diffs are so hard to come across these days, if they are available the prices are ridiculously high. Whereas the mk3 diffs, they are a dime a dozen and can be purchased pretty much anywhere for a reasonable price.
12-28-15, 10:29 AM
#27
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This probably has been discussed several times. And, I do apologize in advance but I'm curious and want to be educated. How come the earlier model Supra(MK3) LSDs wont work on the SC? If the pumpkin wont fit, has anyone tried swapping the internals? The auto TT diffs are so hard to come across these days, if they are available the prices are ridiculously high. Whereas the mk3 diffs, they are a dime a dozen and can be purchased pretty much anywhere for a reasonable price.
https://www.clublexus.com/forums/per...to-a-sc-3.html
12-29-15, 12:10 AM
#28
^^ Yes. A LOT of effort and work went into that experiment.
6SOARER, the MKIII Supra / Cressida / IS300 / Old IS250 / FR-S / BRZ all use a pretty similar rear differential design which are all identical internally. The axles probably vary between all those models but all of them use the same thing in the rear and can interchange if desired.
SC's don't have such luck. It's an entirely different design that is only shared by the SC300-SC400 / Soarer / MKIV Supra NA & TT AUTO / GS300-GS400 / Toyota Aristo / SC430. Though the companion flanges differ between some models and there are extremely minor axle length differences between some models. But they all basically use the same 200mm diff.
Of those, the only ones that got *factory* Torsen LSD options on some trim levels were the Soarer, MKIV Supra (USDM and JDM) and factory 2JZGTE Aristos.
Still, the upside is that the SC/Soarer/MKIV/GS/Aristo/SC430 diffs are all very, very strong regardless of what kind of diff is in there
The MKIII LSDs were often clutch types until late in the production cycle around perhaps 1990. Their early original factory clutch pack LSDs eventually need service and usually benefit from an upgrade to a stronger aftermarket clutch-pack LSD. Not sure how well the early Torsens for the MKIII's hold up versus the later IS300 and FR-S/BRZ Torsens. Not that any of that matters when it comes to SC's...
6SOARER, the MKIII Supra / Cressida / IS300 / Old IS250 / FR-S / BRZ all use a pretty similar rear differential design which are all identical internally. The axles probably vary between all those models but all of them use the same thing in the rear and can interchange if desired.
SC's don't have such luck. It's an entirely different design that is only shared by the SC300-SC400 / Soarer / MKIV Supra NA & TT AUTO / GS300-GS400 / Toyota Aristo / SC430. Though the companion flanges differ between some models and there are extremely minor axle length differences between some models. But they all basically use the same 200mm diff.
Of those, the only ones that got *factory* Torsen LSD options on some trim levels were the Soarer, MKIV Supra (USDM and JDM) and factory 2JZGTE Aristos.
Still, the upside is that the SC/Soarer/MKIV/GS/Aristo/SC430 diffs are all very, very strong regardless of what kind of diff is in there
The MKIII LSDs were often clutch types until late in the production cycle around perhaps 1990. Their early original factory clutch pack LSDs eventually need service and usually benefit from an upgrade to a stronger aftermarket clutch-pack LSD. Not sure how well the early Torsens for the MKIII's hold up versus the later IS300 and FR-S/BRZ Torsens. Not that any of that matters when it comes to SC's...
Last edited by KahnBB6; 12-29-15 at 12:21 PM. Reason: Edited to include the SC430 differentials
12-29-15, 11:41 AM
#29
^^ Yes. A LOT of effort and work went into that experiment.
6SOARER, the MKIII Supra / Cressida / IS300 / Old IS250 / FR-S / BRZ all use a pretty similar rear differential design which are all identical internally. The axles probably vary between all those models but all of them use the same thing in the rear and can interchange if desired.
SC's don't have such luck. It's an entirely different design that is only shared by the SC300-SC400 / Soarer / MKIV Supra NA & TT AUTO / GS300-GS400 / Toyota Aristo. Though the companion flanges differ between some models and there are extremely minor axle length differences between some models. But they all basically use the same 200mm diff.
Of those, the only ones that got *factory* Torsen LSD options on some trim levels were the Soarer, MKIV Supra (USDM and JDM) and factory 2JZGTE Aristos.
Still, the upside is that the SC/Soarer/MKIV/GS/Aristo diffs are all very, very strong regardless of what kind of diff is in there The MKIII LSDs were often clutch types until late in the production cycle around perhaps 1990. Their early original factory clutch pack LSDs eventually need service and usually benefit from an upgrade to a stronger aftermarket clutch-pack LSD. Not sure how well the early Torsens for the MKIII's hold up versus the later IS300 and FR-S/BRZ Torsens. Not that any of that matters when it comes to SC's...
6SOARER, the MKIII Supra / Cressida / IS300 / Old IS250 / FR-S / BRZ all use a pretty similar rear differential design which are all identical internally. The axles probably vary between all those models but all of them use the same thing in the rear and can interchange if desired.
SC's don't have such luck. It's an entirely different design that is only shared by the SC300-SC400 / Soarer / MKIV Supra NA & TT AUTO / GS300-GS400 / Toyota Aristo. Though the companion flanges differ between some models and there are extremely minor axle length differences between some models. But they all basically use the same 200mm diff.
Of those, the only ones that got *factory* Torsen LSD options on some trim levels were the Soarer, MKIV Supra (USDM and JDM) and factory 2JZGTE Aristos.
Still, the upside is that the SC/Soarer/MKIV/GS/Aristo diffs are all very, very strong regardless of what kind of diff is in there
The MKIII LSDs were often clutch types until late in the production cycle around perhaps 1990. Their early original factory clutch pack LSDs eventually need service and usually benefit from an upgrade to a stronger aftermarket clutch-pack LSD. Not sure how well the early Torsens for the MKIII's hold up versus the later IS300 and FR-S/BRZ Torsens. Not that any of that matters when it comes to SC's...