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Old 11-18-2012, 11:42 AM   #1
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Violent vibration after lift kit?!

The vibration starts at 25mph and gets worse the faster you travel, I can't even get to 50mph without feeling like I'm going to fly off the road. The vibration goes away completely when it is in neutral. I can roll down a hill at 50mph with no vibration at all when it's out of gear. Any thoughts on what this could be?

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Old 11-18-2012, 11:48 AM   #2
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Did you put on a SYE or transfer case drop? How high is the lift?

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Old 11-18-2012, 11:50 AM   #3
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It's the rough country 4 inch lift. Yes, I used the transfer case drop.
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Old 11-18-2012, 11:50 AM   #4
Knows a couple things...

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Yep, sounds like a tall suspension lift was installed without the dealer who sold it telling Stickrpg23 that he would have vibrations unless things were done to prevent that from happening.

What needs to be done to get rid of those vibrations will depend entirely on how tall the supension lift is and what the budget is.

Edit: A simple t-case drop is not enough to get rid of the vibrations a 4" suspension lift causes. You MAY get away with just installing a 1" motor mount lift to get rid of the vibes but that still leaves the driveshaft being marginally too short for that much lift height. For a 4" suspension lift, the correct/best fix is to install a SYE kit and aftermarket CV driveshaft.
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.

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Old 11-18-2012, 12:02 PM   #5
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Forgive me for being a complete noob, but is it normal for the vibration to stop when it's out of gear and still moving at the same speed?
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Old 11-18-2012, 12:14 PM   #6
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Without the load on the drivelines, the vibes are not prominent.... normal to a point. also... check your ujoints.
~Todd~ 2004 X 4.0 5 speed---SOLD
4" Lift, 4.56's, 33" Duratracs on M/T Classics
RR SYE, Tatton CV, MML, BL, TT, Dynomax Exhaust
Hella Lighting: Driving, Fogs and H4 E-Codes
NOPE! ... and NEVER will be...
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Old 11-18-2012, 12:19 PM   #7
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Awesome, thank you!

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