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Old 04-28-2013, 11:49 AM   #1
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Suspension Lift Vibs

I just installed a 2.5" Rough Country suspension lift on my wrangler and it has some vibrations. I noticed that it vibrates more once you give it gas. Anyone now of any solutions?

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Old 04-28-2013, 12:23 PM   #2
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I had a Little vibration when I installed my 2.5inch OME lift, I got some grade 8 washers and longer skid plate bolts and just kept adding washers in between the frame and the skid plate until the transfer case was low enough to stop the vibes. I think I ended up with 5 or 6 washers on each bolt.

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Old 04-29-2013, 09:57 AM   #3
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Quote:
Originally Posted by bhsanchez72 View Post
I just installed a 2.5" Rough Country suspension lift on my wrangler and it has some vibrations. I noticed that it vibrates more once you give it gas. Anyone now of any solutions?
Bhsanchez,

Sounds like you need to install a T-Case Drop Kit. when you installed the lift kit, you put your driveshaft on a bind, and that causes it to vibrate.

Another option is to get a Slip Yoke Eliminator Kit (SYE) and a CV Style Driveshaft. This is the better way to get rid of the vibration because it not only stops the vibration, it also eliminates the slip yoke style driveshaft you have currently.

Please feel free to shoot me a PM with any questions you may have.

-Zach
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Old 04-29-2013, 11:57 AM   #4
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Why lift the Jeep and then lower one of the main parts that create a need for lifting to begin with . Cheap yes , right no . If you cant do a SYE now at least try something that will help and also be a key part needed for future mods , a Motor Mount Lift . No, a body lift is not needed . I didn't use one when I had a MML . 5 minutes trimming the plastic fan shroud with a dremel and you are good to go . Now when you want to go to a flatter skid for more clearance you already have a MML installed .
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Old 04-29-2013, 12:50 PM   #5
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Couldnt adjustable control arms also work to help correct the pinion angle?
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Old 04-29-2013, 12:55 PM   #6
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this pretty much covers what you need to know:
What is a CV shaft and why do I want one? - JeepForum.com
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Old 04-29-2013, 01:25 PM   #7
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I added four washers to the TC for now and it still has a small vibration but not as much as it was. Could it be that I have to realign my front end?
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Old 04-29-2013, 01:40 PM   #8
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I installed a 2" lift and to rid the vibrations I added a brown dog 1" MML and still had to drop the t/c skid by 3/4" with grade 8 1/2" washers.
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Old 05-02-2013, 11:59 PM   #9
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Quote:
Originally Posted by UnlimitedLJ04 View Post
this pretty much covers what you need to know:
What is a CV shaft and why do I want one? - JeepForum.com
Wow, how thorough this is. After reading most of it I may go this route even if my balance gets rid of my occasional vibes for better durability, stability of the drivetrain and peace of mind. Thanks for the extremely detailed explanation UnlimitedLJ04.
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Old 05-03-2013, 09:13 AM   #10
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I added four washers to the TC for now and it still has a small vibration but not as much as it was. Could it be that I have to realign my front end?
After lifting, you should always reset your toe-in. lifting your Jeep increases toe-in.
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Old 05-03-2013, 09:24 PM   #11
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good to know, thanks Water Dog!
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Old 05-04-2013, 11:28 AM   #12
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I just got the tires balanced and they noticed one of the tires on the front was unevenly cupped/worn so moved it to the back. Not too bad to replace but causing problem with proper balancing. Heading out for a test run and see if the vibes are noticeably different and will report back. Driving around this morning it was not too bad but hoping the balance smoothes it out even more.

@waterdog. Toe in was checked and where n I had the alignment it obviously was done as it appeared ok today.
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Old 05-05-2013, 08:06 AM   #13
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I drove it about 200 miles yesterday after getting the tires balanced and rotated and no more vibration. It was definitely in the balance for me. Thank you for all the suggestions and if something else crops up, I will consider those as next steps.
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Old 05-05-2013, 01:11 PM   #14
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Quote:
Originally Posted by bhsanchez72 View Post
I just installed a 2.5" Rough Country suspension lift on my wrangler and it has some vibrations...
Sounds about right.
SYE & CV shaft

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