just installed the Supra differential LSD, DIY post on my site
05-07-03, 09:21 AM
#17
Lexus Champion
Re: lsd ? how can i test
Originally posted by lexoman
i purchaced a 99 gs400 last oct 2002 with some mods rmm full kit,front strut brace,lower front
brace,do gs 400 come with trd shocks? rmm intake,rmm exhaust,how can i tell if i have lsd. can i tell by power braking if i have a lsd? please help.
i purchaced a 99 gs400 last oct 2002 with some mods rmm full kit,front strut brace,lower front
brace,do gs 400 come with trd shocks? rmm intake,rmm exhaust,how can i tell if i have lsd. can i tell by power braking if i have a lsd? please help.
The powerbraking test is pretty good. If both tires spin... you SHOULD have a LSD. But, as I have said, these Toyota diff's can fool you and a worn one can have enough internal friction to mimic a true LSD in the powerbrake test. However, if both tires spin... does it matter? Probably in some situations but don't sweat it. Enjoy it.
05-07-03, 01:24 PM
#18
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I HAVE A FRIEND WHO JUST TOTALED HIS 93 SUPRA TT with LSD>>>
Does this mean I can buy his diff and install it into my GS300 ? Its a plug and play MOD ? Well not plug and play but you know what I mean. TAke mine out and put his diff in and I have LSD ??
Love taking turns while the back swings out at a 90degree turn but would love to try to with LSD. Not to mention leaving 2 streaks on someones face instead of one.
Thanks for help...
Does this mean I can buy his diff and install it into my GS300 ? Its a plug and play MOD ? Well not plug and play but you know what I mean. TAke mine out and put his diff in and I have LSD ??
Love taking turns while the back swings out at a 90degree turn but would love to try to with LSD. Not to mention leaving 2 streaks on someones face instead of one.
Thanks for help...
05-07-03, 01:40 PM
#19
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bLingIn3o0,
I am looking for an LSD with diff. will your friend sell it to me? send me PM
I did not know if the supra auto diff fit in the GS3, but it may work, give it a try, definitely a great mod. better than intake and exhaust mod combine
Don't forget, it has to be the AUTO TT supra, NOT 6speed TT supra, to get the 3.76 gear
Anh
I am looking for an LSD with diff. will your friend sell it to me? send me PM
I did not know if the supra auto diff fit in the GS3, but it may work, give it a try, definitely a great mod. better than intake and exhaust mod combine
Don't forget, it has to be the AUTO TT supra, NOT 6speed TT supra, to get the 3.76 gear
Anh
Last edited by BananaGS; 05-07-03 at 01:43 PM.
05-07-03, 02:41 PM
#20
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blah...
food for thought....
if a diff was referred to by what it was, then maybe they would understand what their getting.
Since when is a TorSen diff classified under the generic term "L.S.D." ??
When and How does a properly functioning TorSen "Limit slip"???
power brake test? <~ too many variables involved
a TorSen will also drop Two black marks after the torque Bias Ratio is met under load.
find a paved road and open dirt right next to it. From a stop with driver or passenger half of car in dirt or pavement.. ACCELERATE!!! Off-Roading to test your diff type!!!!
oOps i forgot, Lexus owners...
ok ok.. same test find a open paved lot(street infront of your house) and wet down one side of the road(it better be fairly long) and place your car half in the wet or dry (driver or passenger side, it don't matter)
ACCELERATE!!! from a stop as quickly as you can without just burning out...
how does your Car move? what kind of motion does the car take?
if its Yaw'ing out... L.S.D.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
if a diff was referred to by what it was, then maybe they would understand what their getting.
Since when is a TorSen diff classified under the generic term "L.S.D." ??
When and How does a properly functioning TorSen "Limit slip"???
power brake test? <~ too many variables involved
a TorSen will also drop Two black marks after the torque Bias Ratio is met under load.
find a paved road and open dirt right next to it. From a stop with driver or passenger half of car in dirt or pavement.. ACCELERATE!!! Off-Roading to test your diff type!!!!
oOps i forgot, Lexus owners...
ok ok.. same test find a open paved lot(street infront of your house) and wet down one side of the road(it better be fairly long) and place your car half in the wet or dry (driver or passenger side, it don't matter)
ACCELERATE!!! from a stop as quickly as you can without just burning out...
how does your Car move? what kind of motion does the car take?
if its Yaw'ing out... L.S.D.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
05-07-03, 05:28 PM
#21
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if its Yaw'ing out... L.S.D.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
i will try that and submit my findings.thanks for the info,dont need to buy one if i have one right.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
i will try that and submit my findings.thanks for the info,dont need to buy one if i have one right.
05-09-03, 09:53 AM
#23
Lexus Champion
Originally posted by Leonardo
So, can anyone confirm that the Rear end on the GS300 and the GS400 are the same? I'm in desperate need of an LSD in my car!
So, can anyone confirm that the Rear end on the GS300 and the GS400 are the same? I'm in desperate need of an LSD in my car!
Maybe the LSD out of the IS3 would fit into the GS3?
03-28-10, 10:20 PM
#24
Intermediate
1998 lsd
Been there, done that.
I bought a Supra TT 3.77 gear differential from a 97 automatic (everyone calls them 3.76 but they are actually a 3.769 ratio and that my friends is a 3.77). The guy was POSTIVE it was a Torsen LSD and in fact had been to the dragstrip and it had spun both tires. He also was CERTAIN his car was sold with the LSD option (LSD was an OPTION on 97-98 automatic Supra TTs). Well, I had to change rear covers to make it fit my LS400 and GUESS WHAT!!! It was an OPEN differential, just like the one you show. I argued for days with the seller with him SWEARING it was a LSD. Finally, he believed me and took it back. Another MKVI.com member was selling his 98 diff with essentially the same story. He even had an SC400 and said the traction was night and day and he was CERTAIN it was an LSD. I explained the above and convinced him to open his for inspection and sure enough... NOT and LSD!!!
This situation is both confusing and maddening. Nevertheless, it appears that Toyota/Lexus differentials can wear in the thrust bushing area of the spider gears causing friction. This friction binds the spider gears and has the effect of emulating a limited slip. I have observed this on several higher mileage LS400s and SC400s that NEVER were available with a mechanical LSD.
So, Banana, what you have is a 3.77 geared open diff Supra differential and most likely a worn/sticky spider gear assembly. This will definitely give you better acceleration and SOME LSD properties. Understand that even an open differential supplies torque to BOTH tires UNLESS one tire looses traction. Then and only then does the LSD make a difference. This is needed for hard acceleration both from a standstill and through corners where weight shift causes one tire to have much less traction. If you are enjoying the gearing... great, have fun. If you demanded an LSD... sorry, you don't have one. Your options are removing and returning this diff or installing a TRD clutch types LSD pack. Sorry for the bad news.
Everyone, word to the wise, BEFORE buying a used Supra TT LSD for your car have the seller remove the rear cover and send pictures to confirm it as a true LSD. This should only be necessary on 97-98 Supras as the 93-96 cars should ALL be LSD.
I bought a Supra TT 3.77 gear differential from a 97 automatic (everyone calls them 3.76 but they are actually a 3.769 ratio and that my friends is a 3.77). The guy was POSTIVE it was a Torsen LSD and in fact had been to the dragstrip and it had spun both tires. He also was CERTAIN his car was sold with the LSD option (LSD was an OPTION on 97-98 automatic Supra TTs). Well, I had to change rear covers to make it fit my LS400 and GUESS WHAT!!! It was an OPEN differential, just like the one you show. I argued for days with the seller with him SWEARING it was a LSD. Finally, he believed me and took it back. Another MKVI.com member was selling his 98 diff with essentially the same story. He even had an SC400 and said the traction was night and day and he was CERTAIN it was an LSD. I explained the above and convinced him to open his for inspection and sure enough... NOT and LSD!!!
This situation is both confusing and maddening. Nevertheless, it appears that Toyota/Lexus differentials can wear in the thrust bushing area of the spider gears causing friction. This friction binds the spider gears and has the effect of emulating a limited slip. I have observed this on several higher mileage LS400s and SC400s that NEVER were available with a mechanical LSD.
So, Banana, what you have is a 3.77 geared open diff Supra differential and most likely a worn/sticky spider gear assembly. This will definitely give you better acceleration and SOME LSD properties. Understand that even an open differential supplies torque to BOTH tires UNLESS one tire looses traction. Then and only then does the LSD make a difference. This is needed for hard acceleration both from a standstill and through corners where weight shift causes one tire to have much less traction. If you are enjoying the gearing... great, have fun. If you demanded an LSD... sorry, you don't have one. Your options are removing and returning this diff or installing a TRD clutch types LSD pack. Sorry for the bad news.
Everyone, word to the wise, BEFORE buying a used Supra TT LSD for your car have the seller remove the rear cover and send pictures to confirm it as a true LSD. This should only be necessary on 97-98 Supras as the 93-96 cars should ALL be LSD.
04-27-10, 11:11 AM
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The powerbraking test is pretty good. If both tires spin... you SHOULD have a LSD. But, as I have said, these Toyota diff's can fool you and a worn one can have enough internal friction to mimic a true LSD in the powerbrake test. However, if both tires spin... does it matter? Probably in some situations but don't sweat it. Enjoy it.
04-27-10, 03:50 PM
#27
In for the 7 year old thread, either way it's still an open diff. Try taking a sharp corner and flooring it, you will spin the crap out of one tire. Fellow MN here.
05-31-10, 03:05 PM
#28
Intermediate
Torsen LSD
food for thought....
if a diff was referred to by what it was, then maybe they would understand what their getting.
Since when is a TorSen diff classified under the generic term "L.S.D." ??
When and How does a properly functioning TorSen "Limit slip"???
power brake test? <~ too many variables involved
a TorSen will also drop Two black marks after the torque Bias Ratio is met under load.
find a paved road and open dirt right next to it. From a stop with driver or passenger half of car in dirt or pavement.. ACCELERATE!!! Off-Roading to test your diff type!!!!
oOps i forgot, Lexus owners...
ok ok.. same test find a open paved lot(street infront of your house) and wet down one side of the road(it better be fairly long) and place your car half in the wet or dry (driver or passenger side, it don't matter)
ACCELERATE!!! from a stop as quickly as you can without just burning out...
how does your Car move? what kind of motion does the car take?
if its Yaw'ing out... L.S.D.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
if a diff was referred to by what it was, then maybe they would understand what their getting.
Since when is a TorSen diff classified under the generic term "L.S.D." ??
When and How does a properly functioning TorSen "Limit slip"???
power brake test? <~ too many variables involved
a TorSen will also drop Two black marks after the torque Bias Ratio is met under load.
find a paved road and open dirt right next to it. From a stop with driver or passenger half of car in dirt or pavement.. ACCELERATE!!! Off-Roading to test your diff type!!!!
oOps i forgot, Lexus owners...
ok ok.. same test find a open paved lot(street infront of your house) and wet down one side of the road(it better be fairly long) and place your car half in the wet or dry (driver or passenger side, it don't matter)
ACCELERATE!!! from a stop as quickly as you can without just burning out...
how does your Car move? what kind of motion does the car take?
if its Yaw'ing out... L.S.D.
if its pushing you through its a Torsen
damn... if you ain't goin no where its just open... or dead
Understand the test?
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