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View Poll Results: Will Supra Auto TT LSD work in sc300 rear pumpkin w/ stock ring gear & pinion shaft?
Yes 77 90.59%
No 8 9.41%
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Supra Auto TT LSD Install in sc300 pumpkin?

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Old 06-26-07, 09:03 PM   #31
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Originally Posted by sc300max View Post
Good stuff here! I know that the MKIV n/a lsd will bolt in and keep the same gear ratios, but will the TT auto lsd change the ratios?
if you are able to source an LSD in the Supra housing (~$1200), you are at the mercy of the gears. If you buy an LSD unit on its own (as is the thread of this topic), your speedo will not be off so long as you drop it into your same differential housing.

The n/a LSD is ~4.0 gearing. The TT Auto LSD is 3.76 gearing. For reference, the SC300 auto is 4.27, the SC400 is 3.92 until 98 when they went to 3.26 for the five speed auto, and the SC300 manual is 4.08.

If you switch from 4.27 to 3.76 gears, your speedo will read low. In other words, you are traveling 70 when your speedo says you are going ~62mph. It is a simple ratio to evaluate the error. Also, lower gearing means less whips off the line at the expense of the theoretical ability to reach a higher top speed (assuming you have the necessary speed cut controller and the power to get you to Mach 1).

Many American muscle car guys are all about gears. It is very common for Mustang and Camaro guys to tailor their performance by swapping out the gears for top end thrill or neck-snapping launches.
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Old 07-05-07, 12:16 PM   #32
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so a TT 6spd lsd wont fit in a sc300 or will it with having to buy a few other parts, and if so what parts?
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Old 07-05-07, 03:17 PM   #33
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so a TT 6spd lsd wont fit in a sc300 or will it with having to buy a few other parts, and if so what parts?
the Supra TT 6 speed torsen differential unit DOES NOT fit in the NA rear differential housing.

the Supra TT AUTO torsen differential unit DOES fit int he NA rear differential housing.
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Old 07-05-07, 05:43 PM   #34
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I believe the 6 spd TT LSD has 12 bolts around the circumference of the unit. The TT auto LSD have ten bolts, like our SCs.
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Old 08-29-07, 12:58 AM   #35
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Dejacky: If your interested I have a used Kaaz LSD (Auto) out of my 97 Supra TT Auto with under 500 miles on the lsd for $650 + s/h.

PM me if interested, forgive me for hi-jacking your thread.

BTW, I love your videos on youtube.com
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Old 08-29-07, 11:11 AM   #36
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Originally Posted by vntperform View Post
Dejacky: If your interested I have a used Kaaz LSD (Auto) out of my 97 Supra TT Auto with under 500 miles on the lsd for $650 + s/h.

PM me if interested, forgive me for hi-jacking your thread.

BTW, I love your videos on youtube.com
That's a good deal!
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Old 01-20-08, 09:00 PM   #37
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still available?
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Old 01-21-08, 05:19 PM   #38
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That's good to know. Are you running a 2jz-gte with the factory 5 speed?

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Originally Posted by dejacky View Post
Supra twin turbo automatic torsen limited slip differential has been installed into my Lexus SC300 Rear differential housing. Everything feels butter smooth and the car is so much more stable when turning and braking now, it feels much safer and predictable to drive. When I accelerate or go WOT (wide open throttle), the car now goes straight instead of toqueing to the side and making the rear-end squirley. Dynosaur Performance did the install in just one morning!

These guys ALWAYS deliver what they promise, have many years of experience, and do the job RIGHT the first time. If you're in the Dallas Fort Worth area or just want your car in a truly GREAT shop, this is a "Dejacky Approved" and highly recommended shop!

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Old 01-21-08, 08:00 PM   #39
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That's good to know. Are you running a 2jz-gte with the factory 5 speed?
I'm using a stock 2jz-ge engine with the exception of a 2JZ-GTE headgasket and ARP headstuds. Here are the details:

http://www.clublexus.com/forums/performance-and-maintenance/171570-uh-turbo-time-na-t-feed-me.html
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Old 04-10-08, 08:10 PM   #40
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What if you have an auto SC? What works then?
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Old 04-10-08, 08:58 PM   #41
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What if you have an auto SC? What works then?
Any SC rear end is compatible with the Supra TT Auto LSD. Any SC rear end is also compatible with the Supra n/a LSDs (both 5MT and 4AT).

The only Supra LSD that is not compatible with the SC rear ends is the TT 6MT LSD.

I have personally swapped a TT Auto LSD into an SC300 A/T rear end. I have a good friend on the forums who has done the same swap into an SC400 rear end.
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Old 04-10-08, 10:43 PM   #42
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Quote:
Originally Posted by Blizzy View Post
Any SC rear end is compatible with the Supra TT Auto LSD. Any SC rear end is also compatible with the Supra n/a LSDs (both 5MT and 4AT).

The only Supra LSD that is not compatible with the SC rear ends is the TT 6MT LSD.

I have personally swapped a TT Auto LSD into an SC300 A/T rear end. I have a good friend on the forums who has done the same swap into an SC400 rear end.
Your knowledge about these cars astounds me Blizzy. Thanks for answering both my questions on both threads.
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Old 02-07-09, 03:07 PM   #43
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it has been a while i installed my auto tt lsd in my sc300 5 speed pumpkin... but before to install it on the car the snow stopped me, today it was nice out i went back to install it on and i cant get the two long front bolts to line up with the holes... the 3 number 12 hallen bolts at the back are in but it is still off by a bit at the front... anyone had this problem and solved it?
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Old 04-20-09, 11:24 PM   #44
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Okay, my stock diff blew, ordered TRD LSD (Auto) for my 5 sp. now trying to find the part number to 10 bolts that goes in the ring gear. Toyota Spec says not to re install original bolts. Does anyone know the stock number of specification of the 10 bolts?
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Old 04-29-09, 06:08 PM   #45
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Can anyone recommend a good place to purchase the TRD LSD for a TT Auto?
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Old 04-29-09, 06:08 PM
 
 
 
 
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auto, automatic, change, differential, gearing, install, lexus, lsd, mkiv, ratio, sc300, sc400, stock, supra, tt

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