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truck pulls left under acceleration and goes right decelerating

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Old 11-08-2015, 12:19 PM
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truck pulls left under acceleration and goes right decelerating

Just test drove a 2001 4runner 4wd.

It noticeably pulls to the left when you give it gas and then goes to the right when you back off the gas.

It's more pronounced the faster you go.
At 30 mph it's slightly noticeable and at 50 mph very noticeable.
I didn't try it faster than that as it didn't seem safe.

It's seems more pronounced in 2WD than 4WD.

One of the rear sway bar end links is broken.

Not sure if that's the problem but I've never noticed that with my other trucks with the sway bar disconnected.

Any ideas from the 3rd gen guru's?

thanks

Last edited by Marc; 11-08-2015 at 01:04 PM.
Old 11-09-2015, 06:18 AM
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Bad rack and pinion, tie rods are shot, ball joints are shot. Be very careful those are not problems to be taken lightly.
Old 11-09-2015, 08:18 AM
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So is it the change in weight transfer when accelerating/decelerating on the front end that causes those symptoms?
Old 11-09-2015, 08:34 AM
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I mean that's what it sounds like to me. I'd have the front end checked out immediately. Perhaps even a brake shoe/pad is dragging.
Old 11-10-2015, 09:26 AM
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Originally Posted by vasinvictor
I mean that's what it sounds like to me. I'd have the front end checked out immediately. Perhaps even a brake shoe/pad is dragging.
If it's a brake or wheel bearing issue, you can pretty much bet that that wheel is getting very hot. Just walk around the truck after a test drive and CAREFULLY touch the back of your hand to the hub. If one is a lot hotter than the others, there's your issue. If not, front end, like the man said above.

DON'T BURN YOURSELF.
Old 11-10-2015, 01:04 PM
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I would think if something was dragging it would pull all the time right?
Not just when you backed off the gas?
Old 11-10-2015, 04:03 PM
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Check all control arms, front and rear.
Old 11-10-2015, 11:44 PM
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Red face

I will add broken or really worn engine or transmission mount

under load the engine torques left off the throttle things go back into place since your correcting from going left you now go right.

It like was said can be anything in the front end.

Even something as simple as your broken sway bar link depending on how sensitive you are to the handling of the truck.

It can also be in the rear as well weak spring or bad shocks can do strange things
Old 11-11-2015, 08:11 AM
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Originally Posted by wyoming9
I will add broken or really worn engine or transmission mount

under load the engine torques left off the throttle things go back into place since your correcting from going left you now go right.

It like was said can be anything in the front end.

Even something as simple as your broken sway bar link depending on how sensitive you are to the handling of the truck.

It can also be in the rear as well weak spring or bad shocks can do strange things
I was wondering about the motor mount.
I also thought a shock mount was broken but they checked out ok.
Old 12-03-2015, 08:02 PM
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I'd start with the sway bar links. Quick, cheap and easy.
Old 12-28-2015, 01:08 PM
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Update.
Passed on this truck.
Found a 2000 that steers normally.
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