Small vibration - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-18-2015, 11:05 AM
Thread Starter
  #1
Newb
 
Join Date: Mar 2015
Posts: 4
Small vibration

I had a 2.5 inch rough country lift installed on my 2000 sport wrangler. Now it has a vibration and i was told i needed a transfer lowering kit installed. The jeep has an automatic transmission and i was wondering if it would change my shifter or anything else? Is this what i should do to help vibration?

teddyhorne1968 is offline   Quote
Old 03-18-2015, 10:31 PM   #2
Jeeper
 
MarkyMark117's Avatar
 
Join Date: Dec 2014
Posts: 338
Does it feel like a drive-train vibration or a suspension vibration?

MarkyMark117 is offline   Quote
Old 03-19-2015, 08:40 AM
Thread Starter
  #3
Newb
 
Join Date: Mar 2015
Posts: 4
i think drive train. It seems to get worse the harder I accelarate and about 55 or 60 it seems to ease off
teddyhorne1968 is offline   Quote
Sponsored Links
Advertisement
 
Old 03-19-2015, 10:11 AM   #4
Mostly old school..!

5-Year WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Now searching for rocks in Sumner, TX
Posts: 12,149
A couple of things to check before you jump right to transfer case lowering. First check the condition of your transmission mount. If they are in bad shape or torn in two, they can cause vibrations under acceleration. Also check the condition of u-joints. Sometimes the extra angle produced by small lifts will bring to light what were bad parts originally, but weren't noticeable at the stock height.
__________________
Dennis
Water Dog is offline   Quote
Old 03-19-2015, 10:56 AM   #5
Jeeper
 
TJ4x4me's Avatar
 
Join Date: Feb 2014
Posts: 125
I put the same kit on and had the same problem. A 1" transfer case drop helped mine. Also I had a tall wobble from the back I bought the track bar relocators and that fixed my problem there. Those two things should come with that 2.5 kit. For the record mine vibrated during acceleration. Also mine is an auto 98 model 4.0 and no it didn't change my shifter at all. Both 4wd modes work fine after the transfer case drop.
TJ4x4me is offline   Quote
Old 03-19-2015, 11:40 AM   #6
Jeeper
 
Ryan Angela's Avatar
 
Join Date: Sep 2013
Location: Yorkville IL
Posts: 1,815
As waterdog mentioned, verify your mount and ujoints are in good shape first. If you still need to add a tc drop, start small. Loosen all 3 bolts on each side of your skid plate, then remove one at a time, add 2 washers above the skid, and replace the bolts. Test drive and feel for vibrations. It still felt, add 1 or 2 more washers. When I installed my 2.5" lift, and I still had my dana 35, I think 3 or 4 washers worked for me, I then added longer bolts. The cost of new bolts and washers is still far less than a tc drop "kit" and you won't be lowering more than you need to.
__________________
'01 60th anniversary ed. TJ 4.0 3 speed auto, 3.5" susp lift, 1" MML, 1.25" BL 33X12.5X15 MTR's, weekend toy.
Ryan Angela is offline   Quote
Old 03-19-2015, 12:36 PM   #7
Jeeper
 
TJ4x4me's Avatar
 
Join Date: Feb 2014
Posts: 125
Quote:
Originally Posted by Ryan Angela View Post
As waterdog mentioned, verify your mount and ujoints are in good shape first. If you still need to add a tc drop, start small. Loosen all 3 bolts on each side of your skid plate, then remove one at a time, add 2 washers above the skid, and replace the bolts. Test drive and feel for vibrations. It still felt, add 1 or 2 more washers. When I installed my 2.5" lift, and I still had my dana 35, I think 3 or 4 washers worked for me, I then added longer bolts. The cost of new bolts and washers is still far less than a tc drop "kit" and you won't be lowering more than you need to.
good advice those kits are way too much and just like adding washers.
TJ4x4me is offline   Quote
Old 03-19-2015, 04:41 PM
Thread Starter
  #8
Newb
 
Join Date: Mar 2015
Posts: 4
Thanks so much for the advise. I will try the washers and go from there if other parts look fine. I also was wondering about the wobble in the back so I will def. be doing that. Thanks again
teddyhorne1968 is offline   Quote
Old 03-19-2015, 06:43 PM   #9
Jeeper
 
Zrxpilot's Avatar
 
Join Date: Feb 2015
Posts: 58
I am hoping Water dog will correct me if I am wrong but I think what happened is the lift caused your front/rear pinion angle to move out of parallel with the output shaft of the transfer case. In a perfect world you would want the output shaft of the TC to be parallel with the axle pinion output shaft (minus 1 degree in the back to compensate for axle wrap). This is assuming you do not have a cv driveshaft on either end.

if so, by dropping the skid, you somewhat put this back into spec or at least close enough that it is tolerable.

That being the case, another route you could go would be to install adjustable upper control arms and tweak it perfectly by rotating your axle. You wouldn't have to do anything with the skid and could probably get by with just rear uppers. Having those washers between the skid and the frame would drive me nuts.
__________________
04 Rubicon - H&R+1 coils, Bilstein 5100's, JKS 1.25" BL, Brown Dog 1"MML, OME SS, Metal Cloak U/L CA on 265/75/16 Duratracs.
Zrxpilot is offline   Quote
Old 03-19-2015, 07:22 PM   #10
Jeeper
 
Bfmine's Avatar
 
Join Date: Mar 2015
Posts: 147
I would check ujoints first. At stock height the ujoints probably didn't "twist/rotate" much. Now with the driveshaft angle changed a worn ujoint is more noticeable because it "twists/rotates" more than it would at stock height. Lowering the tcase may help make it feel less noticeable because it will decrease the driveshaft angle but doesn't fix a worn ujoint
Good luck!
Bfmine is offline   Quote
Old 03-19-2015, 08:58 PM   #11
Jeeper
 
Ryan Angela's Avatar
 
Join Date: Sep 2013
Location: Yorkville IL
Posts: 1,815
Quote:
Originally Posted by Zrxpilot View Post
Having those washers between the skid and the frame would drive me nuts.
Having a tc drop kit would make me nuts. Having a few washers in there has an added benefit. It allows air flow through an area of the frame that is one of the first to rot through. Believe me, I couldn't wait to get me SYE/cv drive shaft so I could raise my skid back up. I did however, leave a washer at each bolt for a slight gap.
__________________
'01 60th anniversary ed. TJ 4.0 3 speed auto, 3.5" susp lift, 1" MML, 1.25" BL 33X12.5X15 MTR's, weekend toy.
Ryan Angela is offline   Quote
Old 03-20-2015, 08:08 AM
Thread Starter
  #12
Newb
 
Join Date: Mar 2015
Posts: 4
Thanks for all the comments. Helps to know opinions on the problem.

teddyhorne1968 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 02:44 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.