vibration at 65-70? - Page 3 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > vibration at 65-70?

Stainless Steel Door Hinge PinsPoly Door Hinge BushingsFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye Kit

Reply
Unread 04-12-2011, 08:48 PM   #31
Candymancan
Registered User
1998 ZJ 
 
Join Date: Aug 2010
Location: Virginia
Posts: 3,789
Well my 5.9 did have a bad engine mount, the place i bought it from replaced both mounts. How would i check the transmission mount ?

__________________
2013 6.2 V8 Camaro SS 4k miles
1998 5.9 V8 ZJ 160k miles
1998 4.0 I6 Laredo ZJ 210k miles
Candymancan is offline   Reply With Quote
Unread 04-13-2011, 12:10 AM   #32
Pugulis
Registered User
1996 ZJ 
 
Join Date: Aug 2010
Location: Long Island, New York
Posts: 1,015
I've had the same problem. Mine came at 55 then went away until 70 then it came back until 75, then it was gone again. I put new tires on and for the most part it's gone away. I'm thinking there could be a couple of causes for this. One the steering stabilizer (in conjunction with out of balance tires). My idea goes like this; You've got out of balance tires that start to wobble at high speeds. This causes the stabilizer to become worn out, but not totally shot. If you just put another set of tires on, without being balanced, they are going to be slightly out of balance, causing the problem to continue. So just putting tires on from another vehicle won't fix the problem. And you think it can't be the tires. But it probably still is, along with the stabilizer.

Another thing to consider (and this also goes with the stabilizer being bad) Most of our larger, even stock, tire sizes don't meet UTQGS (Uniform Tire Quality Grade Standards). Basically, truck tires don't meet the same standards as car tires. So even if you've had your tires "high speed" balanced, this may go over the 60mph speed where the wobble exists.

So for me, the next thing I do is replace the stabilizer.
Pugulis is offline   Reply With Quote
Unread 04-13-2011, 05:08 AM   #33
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Quote:
Originally Posted by Candymancan
Well my 5.9 did have a bad engine mount, the place i bought it from replaced both mounts. How would i check the transmission mount ?
Get under it. The Tranny mount is on top of the cross member, under the tranny. Should be circular. If it's solid, should be good, if you can see thru it = replace it.
StidgeInTN is offline   Reply With Quote
Unread 04-13-2011, 08:21 AM   #34
97zjdriver
Registered User
1997 ZJ 
 
Join Date: Apr 2011
Location: binghamton, ny
Posts: 91
How hard is it to replace a pinon bering? And thanks for the replys

Sent from my Droid using JeepForum
97zjdriver is offline   Reply With Quote
Unread 04-13-2011, 03:57 PM   #35
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
I need to correct my error. i.e. Lack of knowledge. Just got my new Tranny mount in the mail, it's not solid like it looked in the picture or like a motor mount. So back to the question of how do you know your tranny mount has gone south. IDK ?
StidgeInTN is offline   Reply With Quote
Unread 04-13-2011, 04:06 PM   #36
speedbucket
Registered User
1993 ZJ 
 
Join Date: Jan 2011
Location: chesapeake, VA
Posts: 3,555
push up on the transfer case, i could move mine vertically quite a bit.
__________________
http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
speedbucket is offline   Reply With Quote
Unread 04-13-2011, 04:07 PM   #37
Candymancan
Registered User
1998 ZJ 
 
Join Date: Aug 2010
Location: Virginia
Posts: 3,789
Quote:
Originally Posted by StidgeInTN View Post
Get under it. The Tranny mount is on top of the cross member, under the tranny. Should be circular. If it's solid, should be good, if you can see thru it = replace it.


edit: didnt see your 2nd post
__________________
2013 6.2 V8 Camaro SS 4k miles
1998 5.9 V8 ZJ 160k miles
1998 4.0 I6 Laredo ZJ 210k miles
Candymancan is offline   Reply With Quote
Unread 04-13-2011, 04:37 PM   #38
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Quote:
Originally Posted by Candymancan

edit: didnt see your 2nd post
I just posted it, and 2nd, i wasn't sure if the 5.9 has the same Tranny mount as my 4.0. I'm looking at it this way, it sure won't hurt to change it and i'll learn something new.
StidgeInTN is offline   Reply With Quote
Unread 04-13-2011, 04:37 PM   #39
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Quote:
Originally Posted by speedbucket
push up on the transfer case, i could move mine vertically quite a bit.
And was that Tranny mount good? Or baaaaaaad?
StidgeInTN is offline   Reply With Quote
Unread 04-13-2011, 04:41 PM   #40
speedbucket
Registered User
1993 ZJ 
 
Join Date: Jan 2011
Location: chesapeake, VA
Posts: 3,555
bad, give me a sec and ill post a pick of the old one
__________________
http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
speedbucket is offline   Reply With Quote
Unread 04-13-2011, 04:48 PM   #41
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Quote:
Originally Posted by speedbucket
bad, give me a sec and ill post a pick of the old one
Here's a pic of the new one. When i first pulled it out of the box i thought i got crap. Closer inspection showed it's made that way.
image-342302416.jpg  
StidgeInTN is offline   Reply With Quote
Unread 04-13-2011, 05:19 PM   #42
speedbucket
Registered User
1993 ZJ 
 
Join Date: Jan 2011
Location: chesapeake, VA
Posts: 3,555
bad one.
with load on it the center was all the way down on the ring
imag0309.jpg  
__________________
http://www.jeepforum.com/forum/f22/speedbuckets-zj-build-1361322/
V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
speedbucket is offline   Reply With Quote
Unread 04-13-2011, 05:41 PM   #43
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
^^ yep, sitting on the rim. That's about where mine's at.
StidgeInTN is offline   Reply With Quote
Unread 04-17-2011, 05:21 AM   #44
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Wanted to update everyone on the Tranny mount. I could move the transfer case up and down a little, but it was really hard to tell it was bad...until i swapped them. I couldn't get a socket on the nut or bolt on the old one, so i had to take the crossmember off. When tightening the new one, with crossmember back in place and weight on mount, i could easily get to the bolt of the tranny mount. So i'd say this would be a good indication if your mount is worn out. In hindsight, i could've done this replacement without taking crossmember out by jacking up the Tranny some more, but wasn't sure how high I could go at the time. Took it for a test spin around town and, maybe it's just in my head, but it felt alot better. I didn't get up to 65-70 yet to see if it helped with vibes yet but will test that today or tomorrow.
StidgeInTN is offline   Reply With Quote
Unread 04-17-2011, 03:47 PM   #45
StidgeInTN
Registered User
1998 ZJ 
 
Join Date: Feb 2011
Location: Knoxville, Tennessee
Posts: 171
Vibe is still there, but i've also got a "clunk" noise back there when i go over bumps. Can't feel anything lose, but prolly control
arm bushings. Don't want to buy bushing kit yet because i'm this close ( picture thumb and forefinger 1/4 " apart ) from getting the RC 3.5" lift and it comes with LCA's.
StidgeInTN is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.