Jeep Xj Vibration issue when revved in park ??? HELP

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Jan 30, 2019 | 09:58 AM

Jered Powelzyk

Thread Starter

Newbie

Joined: Jan 2019

Posts: 3

Likes: 0

Model: Cherokee (XJ)

Engine: 2.8 l v6

Jeep Xj Vibration issue when revved in park ??? HELP

Hello I own a 1986 Jeep Cherokee Laredo with the 2.8l v6. I can’t seem to figure out where this vibration is coming from. As soon as i put it in drive it stops completely. I have replaced all the front fan belts,spark plugs,motor mounts,and transmission mount. What am I doing wrong????

Jan 30, 2019 | 10:38 AM

tinytrax78

Senior Member

Joined: Feb 2011

Posts: 822

Likes: 4

From: orrville ohio

Year: 1994

Model: Cherokee

Engine: 4.0

is there any noise that goes along with the vibration? maybe loose flexplate bolts?

Jan 30, 2019 | 05:28 PM

Turbo X_J

CF Veteran

Joined: Sep 2009

Posts: 8,567

Likes: 20

From: ☼ Blackhole Sun

Year: My Jeep is a GMC

Harmonic balancer.

Jan 30, 2019 | 11:09 PM

GreaseMonkey17

Senior Member

Joined: May 2017

Posts: 645

Likes: 34

Model: Cherokee

Jan 31, 2019 | 10:32 AM

Jered Powelzyk

Thread Starter

Newbie

Joined: Jan 2019

Posts: 3

Likes: 0

Model: Cherokee (XJ)

Engine: 2.8 l v6

Quote:

Originally Posted by tinytrax78

is there any noise that goes along with the vibration? maybe loose flexplate bolts?

no it doesn’t make any noises it’s just when u rev the engine between 900 and 1200 rpms before it goes away.

Feb 6, 2019 | 12:15 AM

gat

Senior Member

Joined: Mar 2016

Posts: 621

Likes: 9

From: Oklahoma

Year: 1992

Model: Cherokee

Engine: 4.0L L6 PowerTech (stock)

When you replaced the motor and transmission mounts did you replace them with like stock rubber or like aftermarket urethane? The rubber isolates vibrations more and the other materials transfers more vibration. Also, did you ensure that the brackets for the mounts were solidly connected?