My Vette swerves under throttle
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Joined: Aug 2010
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From: Avon Park FL
My Vette swerves under throttle
This has happened a few times in the past month. while taking off and getting up to the speed limit (quickly i might add) my car swerves and the active handling light comes on. The tires never break traction though. Before this happened the first time I did get a warning on the transmission coolant temp (257). its only gotten up that high one time and that was after a little hell raising. Do you think the transmission is causing this or something else?
Le Mans Master
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From: CA.
St. Jude Donor '13-'14-'15
Yes typically a swerving feel is due to a bad rear end alignment---check your rear tire wear--It will quickly bald them too---Also--make sure all the sway bars links aren't broken ( they are made out of plastic !) front and back---
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From: Avon Park FL
it doesnt do it all of the time. I have noticed that it does it within 10 minutes of me starting up the car and taking off. So i wouldnt think it would be the suspension. Had front and rear sway bars replaced with Z06 bars. Could the tranny be causing that? or problems with the rear end? This happens when I am going straight down the highway. gets so loose that its almost scary
Last edited by Jharry pope; Dec 20, 2011 at 01:34 PM.
Instructor
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From: pine bluff ar
pull the codes and see what is there.....mine was doing the same thing and the light would stay on ...i would say get a good 4 wheel alignment and then if it still does it have them check the steering wheel pos. sensor mine was bad and would cause the car to change lanes going down the hwy...
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From: Avon Park FL
I will pull the codes up later this morning when I go get the car. I have to drive my pickup truck to work because I get up so early and the neighbors complain when i start up my vette in the morning ;-)
I just dont think its an alignment issue, the tires are wearing evenly and the problem only happens when the car is not up to operating temperature. The tires never lose traction but the active handling light will come on the go back off.
I just dont think its an alignment issue, the tires are wearing evenly and the problem only happens when the car is not up to operating temperature. The tires never lose traction but the active handling light will come on the go back off.
Team Owner
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From: Western NY
I will pull the codes up later this morning when I go get the car. I have to drive my pickup truck to work because I get up so early and the neighbors complain when i start up my vette in the morning.
I just dont think its an alignment issue, the tires are wearing evenly and the problem only happens when the car is not up to operating temperature. The tires never lose traction but the active handling light will come on the go back off.
I just dont think its an alignment issue, the tires are wearing evenly and the problem only happens when the car is not up to operating temperature. The tires never lose traction but the active handling light will come on the go back off.
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Thread Starter
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From: Avon Park FL
if it were something broke in the rear end, wouldnt it do it all of the time instead of only when the engine / tranny is cold? Like i said, it only does it when the car is not up to normal operating temperatures. Will be pulling the codes here in about an hour when i go home to pick up car
Drifting
Joined: Jul 2005
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From: Milpitas CA
Check your A-arm bolts. I recently had an off throttle/ on throttle instability (movement left/right) issue. It was a rear A-arm bolt that had backed out allowing rear toe to change when power was applied or removed.
Dog
Dog
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From: Portland OR
Safety Car
Joined: Aug 2011
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From: Portland OR
That it the converter clutch slip code.
Wouldn't have anything to do with your issue.
GM fixed the TCC control valve in 2001 and the fix for earlier trans is to replace the valve body.
"The scan tool may show a DTC P1870 set as a history code.
A harsh 1-2 shift or DTC P1870, caused by wear in the control valve body, may be difficult to duplicate when the transmission temperature is below 93°C (200°F).
Cause
The condition may be due to wear in the control valve body. This wear occurs in the bore that contains the TCC isolator and regulator valves, and results in poor, or no, TCC apply."
Ron
Wouldn't have anything to do with your issue.
GM fixed the TCC control valve in 2001 and the fix for earlier trans is to replace the valve body.
"The scan tool may show a DTC P1870 set as a history code.
A harsh 1-2 shift or DTC P1870, caused by wear in the control valve body, may be difficult to duplicate when the transmission temperature is below 93°C (200°F).
Cause
The condition may be due to wear in the control valve body. This wear occurs in the bore that contains the TCC isolator and regulator valves, and results in poor, or no, TCC apply."
Ron
Last edited by RonSSNova; Dec 21, 2011 at 12:45 PM.
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From: Avon Park FL
i did have one issue with it shifting very hard into 2nd gear when the transmission fluid temp was above 200 so that would explain that code but I am at a loss as to why its gets a little loose when under moderate to hard throttle and why it only does it intermittently. Well i will have my mechanic give it the once over when I get a new transmission. I am pushing a little more HP than stock now and probably should get a better tranny. current tranny has over 120,000 on it
Safety Car
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From: Portland OR
Mine also has the P1870 code, and also intermittantly bangs 2nd real hard.
Mine is a 2000. 80K miles.
I have a 2001 trans that I'll go through as I'm about to add a bunch more hp to mine as well.
My car is currently stock, and has no swerving problems....will barely light the tires!
Mine is a 2000. 80K miles.
I have a 2001 trans that I'll go through as I'm about to add a bunch more hp to mine as well.
My car is currently stock, and has no swerving problems....will barely light the tires!
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From: Avon Park FL
I just hate the thought of dropping another $2500+ into my car. Hell I have over $15,000 in the engine and drivetrain. I knew I should have went ahead and put another tranny in it while i was having the new engine put in. oh well
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Joined: Aug 2010
Posts: 60
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From: Avon Park FL
Mine also has the P1870 code, and also intermittantly bangs 2nd real hard.
Mine is a 2000. 80K miles.
I have a 2001 trans that I'll go through as I'm about to add a bunch more hp to mine as well.
My car is currently stock, and has no swerving problems....will barely light the tires!
Mine is a 2000. 80K miles.
I have a 2001 trans that I'll go through as I'm about to add a bunch more hp to mine as well.
My car is currently stock, and has no swerving problems....will barely light the tires!
