13JK Shudder @ Low RPM (like rough idle but not) - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK 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 09-25-2016, 06:12 PM
Thread Starter
  #1
Newb
 
venture4wd's Avatar
 
Join Date: Sep 2016
Location: Lancaster, PA
Posts: 5
13JK Shudder @ Low RPM (like rough idle but not)

Hi! This is my first post.

Back in December 2015, I got a used 13 JKUR. On the test drive, I noticed it "ran rough" at idle when stopped at lights. As a long-time Jeep enthusiast, it didn't bother me too much. I figured it's just been sitting on the lot and had stale gas or something. However, almost 15k miles later, the issue persists.

To elaborate, this is not an issue with engine operation. The 3.6 purrs like a kitten. I'm reasonably certain that this is a vibration isolation issue, like a motor mount and/or transmission mount isn't doing its job.

Furthermore, when I'm idling with the Jeep facing uphill, the shudder is more prominent, and when I'm idling with the Jeep facing downhill, it is vibration-free and as smooth as silk.

I had the dealer look at it, and they were absolutely useless. They said the mounts looked fine, then they cleaned the throttle body, and said, "Here. See if that helps," and sent me on my way.

Months later, I had my man take a look at it. He said he felt it too, acknowledged that I wasn't crazy, and agreed that it isn't an engine operation issue. Something is "out of balance," but he regretfully couldn't figure it out.

After some Googling, I read about a few other cases that sounded kind of similar to mine, and they claimed that a new tranny mount solved the problem. So aside from this post, that's my plan of attack - to just start throwing parts at it over time hoping it will go away.

You guys have any thoughts?

Thanks!



venture4wd is offline   Quote
Old 09-27-2016, 12:59 PM   #2
Jeeper
 
Phi502's Avatar
 
Join Date: Jan 2016
Location: Tennessee
Posts: 29
Does your continue after you are stopped?
I have a similar vibration as I am coming to a stop at low rpm's. but once stopped it goes away.
Taking it to the dealer this week for this and a couple other issues.
I did read a TSB on a "rattle when stopping" that was related to a guide pin on the brake caliper...
If I learn anything from the dealer, I will post.

__________________
2016 JKU Rubicon Hard Rock
Past:
93 YJ, 2005 WK
Phi502 is offline   Quote
Old 09-27-2016, 04:25 PM   #3
Jeeper
 
Join Date: Dec 2008
Posts: 21
I have the same issue 2012 JKU Sahara. It's rattles when in drive and stopped. Thought it was the due to the AC however with all off it still vibrates. Going to the dealer on Thursday. When it park it seems to be fine its when in Drive or reverse and brake pressed.
Paul.mea is offline   Quote
Sponsored Links
Advertisement
 
Old 09-27-2016, 04:27 PM   #4
Jeeper
 
Join Date: Dec 2008
Posts: 21
Quote:
Originally Posted by Phi502 View Post
Does your continue after you are stopped?
I have a similar vibration as I am coming to a stop at low rpm's. but once stopped it goes away.
Taking it to the dealer this week for this and a couple other issues.
I did read a TSB on a "rattle when stopping" that was related to a guide pin on the brake caliper...
If I learn anything from the dealer, I will post.

Mine only is when I am stopped. I don't feel any vibrations while moving at all.
Paul.mea is offline   Quote
Old 09-27-2016, 09:15 PM
Thread Starter
  #5
Newb
 
venture4wd's Avatar
 
Join Date: Sep 2016
Location: Lancaster, PA
Posts: 5
Quote:
Originally Posted by Phi502 View Post
Does your continue after you are stopped?
My shudder is when stationary. I hope that you get your issue resolved!

Quote:
Originally Posted by Paul.mea View Post
I have the same issue 2012 JKU Sahara. It's rattles when in drive and stopped. Thought it was the due to the AC however with all off it still vibrates. Going to the dealer on Thursday. When it park it seems to be fine its when in Drive or reverse and brake pressed.
I'm sorry to hear that you have a similar issue. Please let me know what you find out from the dealer!
venture4wd is offline   Quote
Old 09-28-2016, 09:01 AM   #6
Jeeper
 
Kgriff's Avatar
 
Join Date: Aug 2010
Location: West Virginia
Posts: 215
I had the similar issue as well as when auto trans was in reverse but foot on the brake. In my case, as you eluded to, it was a bad motor mount. Good Luck!
__________________
'07 JKU Sahara Teraflex 2.5" TF BB, 16" MB TKO's, 315/75r16 Cooper STT Pros, VDP stubby bumper, Rigid Dually A pillar LED's, WP outter cowl covers, ace rock rails 4.10 gears, AT, antennaX antenna, smittybuilt seatcovers and some plastidip.
Kgriff is offline   Quote
Old 09-29-2016, 03:21 PM   #7
Jeeper
 
Join Date: Dec 2008
Posts: 21
Left the car at the dealer. He just called me said there was a cable which was rubbing and was causing the vibration. He said they moved hey secured the cable and it now does not vibrate. There was 1 hr charge to find problem and secure the cable.

Also on a side note...He replaced the air filter as it was due. I requested he put back the original as I had purchased a K&N filter. Anything I should be concerned about. I had purchased it on amazon and just arrived a few weeks ago however I didn't replace it yet as there was this vibration.
Paul.mea is offline   Quote
Old 10-08-2016, 11:24 AM
Thread Starter
  #8
Newb
 
venture4wd's Avatar
 
Join Date: Sep 2016
Location: Lancaster, PA
Posts: 5
Quote:
Originally Posted by Paul.mea View Post
Left the car at the dealer. He just called me said there was a cable which was rubbing and was causing the vibration. He said they moved hey secured the cable and it now does not vibrate. There was 1 hr charge to find problem and secure the cable.
A cable, eh? Thanks for the update. My shudder feels a little too profound to be caused by a cable, but I'll certainly take a look. You never know. Glad you got yours resolved!

venture4wd 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 08:31 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, 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 © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 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.