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Serious Handling Issue!

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Old 07-21-2012, 05:50 PM
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Default Serious Handling Issue!

I have an issue with the rear of my car. It sways very badly when I let of the accelerator. Its only rectified by accelerating more and or braking. What could cause this??? My suspension includes: UMI tunnel mounted Torque arm, rear control arms with relocation brackets. Bmr rear sway bar, Bmr adj panhard rod. Thanks.
Old 07-21-2012, 06:08 PM
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Verify that everything back there is tightened.
Old 07-21-2012, 10:24 PM
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Can you explain a bit more? Sways side to side?
Old 07-22-2012, 08:28 AM
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Originally Posted by UMI Sales
Can you explain a bit more? Sways side to side?
Yes is sways from side to side. It seems as if I am losing control while going straight.
Old 07-22-2012, 09:17 AM
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check everything out under there. including the adjusters to make sure they didnt pull the threads out
Old 07-22-2012, 09:40 AM
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Stock shocks?
Old 07-22-2012, 09:46 AM
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Wow my car does the EXACT same thing!
One the tc is locked up you can get on and off the gas and the rear of the car will sway back and forth.
I think my problem is the panhard bar/bushing. Can't find any obvious movement but the bushing looks cracked and dry rotted.

Good luck getting it fixed! Let us know what you find.
Old 07-22-2012, 01:15 PM
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Originally Posted by z28bryan
Stock shocks?
I have the KYB Gr2's on the rear.... I have some new rear shocks coming though. I just put the Kyb AGX adj. struts up front and will have the same ones on the rear.
Old 07-22-2012, 02:14 PM
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Sounds like something with the panhard....
Old 07-22-2012, 02:27 PM
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Panhards prob messed up. Also make sure the rear is where it should be.
Old 07-23-2012, 09:47 AM
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Inspect every bolt and be sure everything is tight. Also, look at tire pressure and tire wear. Could be something to do with the rearend not being aligned correctly as well. But, as mentioned above, it starts with an inspection of the bolts and bushings to make sure everything is ok. Let us know.

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Old 07-28-2012, 10:24 PM
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I tightened the controls arm and it helped a little. I think I will turn my attention towards the panhard rod. What is the best way to line it up correctly?
Old 07-29-2012, 08:34 AM
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This is just a guess from me...

When the PHB and LCAs move along their range of travel, maybe the rear end is going toe left or toe right? This would cause your rear end to steer in the back of the car, which causes an unstable feeling. GR2 shocks don't have a lot of damping and might cause the rear suspension travel to move up and down uncontrollably. If the rear has the LCA's not level and the PHB isn't level then the rear could shift around a lot more. Combined with bad shocks, you could have the rear end steering on you.

I don't know though.. take it with a grain of salt. Make sure the bolts are all tightened and bushings are good. It's not impossible though that this is the case.
Old 07-30-2012, 10:19 AM
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Originally Posted by SUPERMAN_00TA
I tightened the controls arm and it helped a little. I think I will turn my attention towards the panhard rod. What is the best way to line it up correctly?
The best method for a backyard mechanic is to get a set or make a set of drive-on ramps. This will give you easy access to the rear adjuster so you'll be able to fine-tune your wrenching.

Next step: Get a piece of string and tape a coin or tie a nut to the bottom to keep the string straight. Then tap that string onto the finder directly above the tire. Measure from the face of your wheel to the string and mark down measurements on both sides. You'll probably notice the distance on the driver's side if shorter than the passenger side - typical of a car that has been lowered.

Now that you have these measurements, you'll be able to wrench on the adjuster and draw the bar shorter which will move the body of the vehicle over the rearend. Keep making measurements with each turn until you have it square on both sides. Then you're done!

Total process should only take a few minutes.

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