Hitting Rev Limiter
Thread Starter
Lexus Fanatic
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Joined: Jul 2003
Posts: 10,681
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From: Tulsa, Oklahoma
Hitting Rev Limiter
Guys,
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
umm that's weird. i have heard about the rev limiter problem on FI cars, but on NA cars, i am surprised that it's a problem. my gs4 with tc and lsd i don't have that problem, the car still shifts pretty smooth from 1st to 2nd
Originally Posted by Dx3
Would that not slow me down?
Jonny
Jonny
What have you gotta lose. Just see does it hit the limiter?
Lexus Test Driver
Joined: Jun 2002
Posts: 869
Likes: 1
From: California
Originally Posted by Dx3
Guys,
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
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Thread Starter
Lexus Fanatic
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Joined: Jul 2003
Posts: 10,681
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From: Tulsa, Oklahoma
Originally Posted by FutureGS400
I haven't had that happen on my car that I've ever noticed. You might try installing a shift kit (valve body upgrade etc.) I know I've read some threads that discussed the benefits and if your car is shifting a bit slowly, that might help. Would also help your overall performance with crisper shifts too! I am just beginning to investigate this mod for my car...
Jonny
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Verdad Gallardo
Joined: Feb 2001
Posts: 31,944
Likes: 2,739
From: North Carolina
Similar to you there are a few folks over the years that have had problems hitting the rev limiter with both the PI TC @ 2800 and RMM or Supra TT 3.76 LSD. Those that have either lived with it or took out the LSD.
There are more people that have both that have no issues with banging on the rev limiter than those that have. . Lowering the stall speed might help if you do have the problem (it did for my car under different circumstances due to FI).... if you have a PI TC you get one stall change free, but of course you still have the labor of taking it in / out. You might also try switching to Amsoil synthetic ATF for your GS. I did both and helped fix my rev limiter problem.
There are more people that have both that have no issues with banging on the rev limiter than those that have. . Lowering the stall speed might help if you do have the problem (it did for my car under different circumstances due to FI).... if you have a PI TC you get one stall change free, but of course you still have the labor of taking it in / out. You might also try switching to Amsoil synthetic ATF for your GS. I did both and helped fix my rev limiter problem.
Pole Position
Joined: Nov 2004
Posts: 266
Likes: 0
From: Oregon
Can you add amsoil synthetic atf 2 quarts at a time when you drain the pan (does it mix OK with toyota type iv) or do you have to change out all the fluid when you go to amsoil?
Originally Posted by DaveGS4
Similar to you there are a few folks over the years that have had problems hitting the rev limiter with both the PI TC @ 2800 and RMM or Supra TT 3.76 LSD. Those that have either lived with it or took out the LSD.
There are more people that have both that have no issues with banging on the rev limiter than those that have. . Lowering the stall speed might help if you do have the problem (it did for my car under different circumstances due to FI).... if you have a PI TC you get one stall change free, but of course you still have the labor of taking it in / out. You might also try switching to Amsoil synthetic ATF for your GS. I did both and helped fix my rev limiter problem.
There are more people that have both that have no issues with banging on the rev limiter than those that have. . Lowering the stall speed might help if you do have the problem (it did for my car under different circumstances due to FI).... if you have a PI TC you get one stall change free, but of course you still have the labor of taking it in / out. You might also try switching to Amsoil synthetic ATF for your GS. I did both and helped fix my rev limiter problem.
Instructor
Joined: Jul 2002
Posts: 1,216
Likes: 71
From: South Florida
I have the LSD and PI TC combo and do not have any problems whatsoever. Under WOT the rpms get up there but shift right before the red line. A while back I had a similar incident where under WOT my car would make this air leaking sound from the engine bay which sounded similar to an exhaust leak only to find out that my RMM intake airflow meter gasket had a leak bcos it was not seated properly. This would only happen under WOT. You may want to double check the gasket to make sure that it is properly sealed. I ended up putting in a thicker gasket which took care of the problem
Good luck
Good luck
Lexus Champion
Joined: Sep 2001
Posts: 1,808
Likes: 1
From: California
Originally Posted by Dx3
Guys,
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
Car is a 98 GS400 with TC, LSD, exhaust and SRT Intake. When at WOT on my shift between 1st and 2nd gear I always thought that I had some type of back pressure problem or exhaust leak. It felt like some type of lag. After reading previous posts I have concluded that I think I am hitting my rev limiter because of the LSD. It only happens at WOT going from 1st to 2nd, but no other gears.
It kinds sucks because I want to bring the car to the track for a 1/4 time, but either I have to lay off the gas when I am getting to gear change, or else suffer the lag of the limiter hitting.
Is there anyway around this?
Jonny
I also had the same issue when I had the K&N FIPK and the ATS LSD (stock gearing). Really kills the 1/4 time and trap speed.