Auto TT diff or 6 speed diff?
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Lexus Test Driver
Joined: Apr 2002
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From: Wisconsin
Auto TT diff or 6 speed diff?
Now, I have a auto supra TT diff sitting in my garage. I bought this before I got my TT motor and 6- speed tranny. Now what I am wondering is would it be better to get the 6 speed diff now or stay with the auto diff and get a new flange welded onto the 6 speed driveshaft?
Lexus Champion
Joined: Jul 2001
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From: California
The Supra TT Auto LSD would give more torque and less wheelspin at the increased gear ratio. You shouldn't have to mdoify the driveshaft at all. If there is a difference (since I can't remember) then you should change the front end of the diff instead. If your speedo is correct with the manual LSD then now you will be going slower than the speedo says with the Auto LSD. What is the reason you are considering this?
Pole Position
Joined: Jan 2003
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From: Alabama
Originally posted by Hermosa
The Supra TT Auto LSD would give more torque and less wheelspin at the increased gear ratio.
The Supra TT Auto LSD would give more torque and less wheelspin at the increased gear ratio.
I would go with the 6 speed LSD. The 6 speed is designed to go with the 6 speed's LSD. Mohd on mkiv.com said he switched from auto to 6, left the LSD, and it felt crap. Especially if you add power, first gear is going to be really really short with the auto LSD. Check out the gear ratios for the Auto and 6sp:
Auto: 2.804, 1.531, 1, 0.705, -2.393...... LSD is 3.769
V160: 3.827, 2.36, 1.685, 1.312, 1, 0.793, -3.28...... LSD is 3.266
V161: 3.724, 2.246, 1.541, 1.205, 1, 0.818, -3.192...... LSD may be 3.266 or between 3.1 and 3.2???
If you put that 3.827 with a 3.769 rear end, that's going to be one short gear.
With a 6sp LSD, you will need the correct driveshaft and axle too though.
If you sell the Auto LSD, how much do you want for it? I have wanted one for aaaages for my V8.
Last edited by Fred Smith; Sep 2, 2003 at 03:16 AM.
Chicago Lexus Club Moderator
Joined: Jul 2001
Posts: 3,721
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From: Illinois
Originally posted by Fred Smith
Uhh, don't you mean more torque and more wheelspin?
I would go with the 6 speed LSD. The 6 speed is designed to go with the 6 speed's LSD. Mohd on mkiv.com said he switched from auto to 6, left the LSD, and it felt crap. Especially if you add power, first gear is going to be really really short with the auto LSD. Check out the gear ratios for the Auto and 6sp:
Auto: 2.804, 1.531, 1, 0.705, -2.393...... LSD is 3.769
V160: 3.827, 2.36, 1.685, 1.312, 1, 0.793, -3.28...... LSD is 3.266
V161: 3.724, 2.246, 1.541, 1.205, 1, 0.818, -3.192...... LSD may be 3.266 or between 3.1 and 3.2???
If you put that 3.827 with a 3.769 rear end, that's going to be one short gear.
With a 6sp LSD, you will need the correct driveshaft and axle too though.
If you sell the Auto LSD, how much do you want for it? I have wanted one for aaaages for my V8.
Uhh, don't you mean more torque and more wheelspin?
I would go with the 6 speed LSD. The 6 speed is designed to go with the 6 speed's LSD. Mohd on mkiv.com said he switched from auto to 6, left the LSD, and it felt crap. Especially if you add power, first gear is going to be really really short with the auto LSD. Check out the gear ratios for the Auto and 6sp:
Auto: 2.804, 1.531, 1, 0.705, -2.393...... LSD is 3.769
V160: 3.827, 2.36, 1.685, 1.312, 1, 0.793, -3.28...... LSD is 3.266
V161: 3.724, 2.246, 1.541, 1.205, 1, 0.818, -3.192...... LSD may be 3.266 or between 3.1 and 3.2???
If you put that 3.827 with a 3.769 rear end, that's going to be one short gear.
With a 6sp LSD, you will need the correct driveshaft and axle too though.
If you sell the Auto LSD, how much do you want for it? I have wanted one for aaaages for my V8.
Chris
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