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Discussion Starter #1
Need to see if anyone else has experienced something like this. I have installed a Teraflex 1.5" levelling kit, Rockstar rims and BFG All-Terrain TA KO 305/65R18 tires. Now when driving on city streets the ride is so bouncy that people in the back seat are swaying back and forth and bouncing around as if I was off-roading. I find that the slightest bump causes the Jeep to sway back and forth rather than just bounce up and down. Is this normal or is something seriously out of whack?
 

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What tire pressure are you running? Bouncey usually means high tire pressure. Most tire places fill the tires to 35-40 PSI.
 

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Did you do the instal? A tip I recently learned is you need to loosen the trac bar bolts, LCA bolts, and swaybar disconnect link bolts prior to installing any lift. Do not re tighten until your rig is on the floor and you have literally shaken the hell out of it. Not doing so will cause binding in your bushings as the geometry is now changed, regardless of how high you went.
 

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Tire pressure is certainly key. I also had a jeep that had loose shock bolts once. That thing bounced like tigger! Check to make sure the shocks have been tightened.
 

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... Now when driving on city streets the ride is so bouncy that people in the back seat are swaying back and forth and bouncing around as if I was off-roading. I find that the slightest bump causes the Jeep to sway back and forth rather than just bounce up and down. ...
That actually sounds kind of fun! Maybe you should leave it that way? Do you have young boys? My five-year-old son would love all that.
 

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Discussion Starter #11
Did you do the instal? A tip I recently learned is you need to loosen the trac bar bolts, LCA bolts, and swaybar disconnect link bolts prior to installing any lift. Do not re tighten until your rig is on the floor and you have literally shaken the hell out of it. Not doing so will cause binding in your bushings as the geometry is now changed, regardless of how high you went.
That might be the problem. I did the install myself based on the instructions that came with the kit. While the jeep was still in the air I tightened and torqued all of the bolts.

I am only running 32 psi in the tires. There really isn't any jarring, just seems very sloppy and all over the place. Factory shocks are still installed.
 

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Discussion Starter #12
I just made an appointment to get an alignment done on Friday. Hopefully that will fix the issue.
 

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Did you do the instal? A tip I recently learned is you need to loosen the trac bar bolts, LCA bolts, and swaybar disconnect link bolts prior to installing any lift. Do not re tighten until your rig is on the floor and you have literally shaken the hell out of it. Not doing so will cause binding in your bushings as the geometry is now changed, regardless of how high you went.
That might be the problem. I did the install myself based on the instructions that came with the kit. While the jeep was still in the air I tightened and torqued all of the bolts.

I am only running 32 psi in the tires. There really isn't any jarring, just seems very sloppy and all over the place. Factory shocks are still installed.
The binding that Gluestick speaks of is actually a great recipe for causing Death Wobble (the real version) in the future. Follow his instructions to avoid it.

And check your PSI, as others have said.
 

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Actually the BFG All-Terrain TA KO 305/65R18 should be at 35 psi. 29-30psi is too low for that class of tire. But some tire place will still over inflate a E class tire for a heavier vehicle. I have seen some inflate them to 50-60psi. Make sure it has a PSI of 35.
 

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I just made an appointment to get an alignment done on Friday. Hopefully that will fix the issue.
Alignment would cause a pull on the steering but doubt it would cause what you are listing. 32psi in the tires wouldn't cause this either. I would recheck every bolt that was taken loose during installation to make sure everything is still tight. It seems more of a problem in the swaybar, trackbar, control arm, or some other suspension type area.
 

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Discussion Starter #16
Stupid question but while the Jeep is on the ground can I just loosen the bolts (same ones removed during install), shake the jeep and then tighten the bolts (proper torque) all over again? I just don't have access to the lift this week.
 

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You could, but I couldn't expect it would release all the binding points. Taking the weight and load off the components by putting it on jack stands, loosening, lowering, then tighetening would most certainly be the correct answer. Use obvious caution and common sense though- do not get under a vehicle supported solely by a jack, always use a lift or jack stands. It's a good excuse to pick up a pair, if you don't already own them.
 

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Discussion Starter #18
Thanks for all the advice. I took a better look at everything. The tires were recently installed and the 32 psi is what the installer put them at. I looked at the sidewall and see that the psi rating is 65 (cold). That being said I inflated the to 50 psi and took it out for a spin. I'd say the issue is pretty much gone. It certainly handles better and is not bouncing all over the place. I know a lot of people say you should inflate it to what the vehicle sticker shows but I'm pretty sure that only applies to the stock tire size that comes with the vehicle. Correct?
 

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when installing any sort of lift you are supposed to set the weight of the vehicle down before torquing everything. Loosening, setting it down then locking everything tight might solve your issues. And... I would do it before the allignment. I also run my 33" 15's at 30 psi with the lower weight of the Jeep. You'll have to play with the pressure, 5 pounds makes a hell of a difference imo.
 

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adrenalin said:
Thanks for all the advice. I took a better look at everything. The tires were recently installed and the 32 psi is what the installer put them at. I looked at the sidewall and see that the psi rating is 65 (cold). That being said I inflated the to 50 psi and took it out for a spin. I'd say the issue is pretty much gone. It certainly handles better and is not bouncing all over the place. I know a lot of people say you should inflate it to what the vehicle sticker shows but I'm pretty sure that only applies to the stock tire size that comes with the vehicle. Correct?
Correct the number on the door is for stock tires. And I'm pretty sure the number on the tire is MAX pressure, you shouldn't use that for your target pressure.
 
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