Help me with this noise please - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 17 Old 09-24-2013, 06:47 PM Thread Starter
Sal
Registered User
 
Join Date: Jun 2003
Posts: 59
Wj Help me with this noise please

1999 wj v8 When traveling 40 mph and faster when I let off the gas and coast there is a constant howling or whining noise. The slightest touch of the gas and it goes away until the jeep decels. I am having a very hard time figuring out where it is coming from. It sound like a bearing but could be wrong. Here is the strange thing about it. Put the jeep up on stands and brought it up to speed. The noise is not there while coasting on jack stands. I can eliminate the transfer case and front axle since they were changed. The jeep has rezzepa joints in the front and u-joints in the rear. I am guessing it could be either drive shaft, possibly rear wheel bearings or the rear axle pinion bearings. Would any of these cause my noise? There is also some vibration associated which is felt from the passenger seat and passenger rear. One more thing I have done is sit in the cargo area and put my ear right above the rear differential and the noise is barely heard. Is there a drive line specialty shop anywhere in NY or NJ who can find my problem. I have no problem doing the work myself but very frustrated because I cant find the problem. If anyone has any idea let me know. Need to get this repaired. Thank you.

Sal is offline  
Sponsored Links
Advertisement
 
post #2 of 17 Old 09-25-2013, 05:00 AM
asatxj
Registered User
 
asatxj's Avatar
2001 WJ 
 
Join Date: Jan 2004
Location: West Michigan
Posts: 998
Sounds like rear wheel bearings. Are you rear axle seals leaking?

Jeep Fleet Maintenance Director
'00 WJ, son's Jeep,'01 WJ mine, '04 TJ, brother's Jeep,00 WJ daughter's
Maintain your stuff so you don't have to fix your junk
ASAT= All Season All Terrain
asatxj is offline  
post #3 of 17 Old 09-25-2013, 06:21 AM Thread Starter
Sal
Registered User
 
Join Date: Jun 2003
Posts: 59
No they are not leaking. I did not think wheel bearings noise would come and go with the accelerator?
Sal is offline  
post #4 of 17 Old 09-25-2013, 06:26 AM
Lustra
Junior Member
 
Join Date: Sep 2013
Posts: 69
Sounds like rear wheel bearings, I can hear them too LOL

Quote:
Originally Posted by asatxj View Post
Sounds like rear wheel bearings. Are you rear axle seals leaking?
_______________________________________
Quote:
Originally Posted by newfieZJ
We may have gotten off to a bad start , but , you are one ignorant SOB
Yes , the mileage is stored in the PCM , it's only available through a DRB scan, it is irrelevant to 99% of jeepers
What about the other 1%?

________________________________

Silly Hillbilly
Lustra is offline  
post #5 of 17 Old 09-25-2013, 01:53 PM Thread Starter
Sal
Registered User
 
Join Date: Jun 2003
Posts: 59
Another thing noticed, if I am coasting and put the jeep in neutral the noise is still there but not on the jack stands. What makes you think wheel bearings over the pinion?
Sal is offline  
post #6 of 17 Old 09-25-2013, 02:11 PM
asatxj
Registered User
 
asatxj's Avatar
2001 WJ 
 
Join Date: Jan 2004
Location: West Michigan
Posts: 998
Great job kids!
Ok how about a rephrase;
Based on the symptoms you present it is a possibility that you may have a bad wheel bearing. It could also be a pinion bearing as it has a load on it when you are accelerating and when coasting no load and could therefore produce noise. Producing an accurate diagnosis without actually hearing it is excedingly difficult.
I would go through the drive line and eliminate things, ujoints, xcase output shaft bearings etc. Check for wear and replace what's worn.

Jeep Fleet Maintenance Director
'00 WJ, son's Jeep,'01 WJ mine, '04 TJ, brother's Jeep,00 WJ daughter's
Maintain your stuff so you don't have to fix your junk
ASAT= All Season All Terrain
asatxj is offline  
post #7 of 17 Old 09-25-2013, 02:26 PM
nolimitssjca
Registered User
1999 WJ 
 
Join Date: Sep 2013
Location: San Jose
Posts: 176
Sal for what it's worth I was chasing a noise with similar characteristics. Only grinds under braking or deceleration. Turned out it was the cable to the transfer case dropped down near the axle and was rubbing. Found the clip that hold it to the transmission failed. Put it back up and the grinding is gone. Good luck!

1999 WJ 4x4, 1997 ZJ 4x4
1997 Mountaineer 4x4, 1996 Explorer 4x4
1972 Mustang Mach 1 351 Cleveland, 1972 Mustang Coupe 302
1970 Chevy C-20 350, 2002 Kawasaki Vulcan
nolimitssjca is offline  
post #8 of 17 Old 09-25-2013, 08:33 PM
Lustra
Junior Member
 
Join Date: Sep 2013
Posts: 69
Sounds like special ed to me Kids!!!


_______________________________________
Quote:
Originally Posted by newfieZJ
We may have gotten off to a bad start , but , you are one ignorant SOB
Yes , the mileage is stored in the PCM , it's only available through a DRB scan, it is irrelevant to 99% of jeepers
What about the other 1%?

________________________________

Silly Hillbilly
Lustra is offline  
post #9 of 17 Old 09-26-2013, 05:44 PM
asatxj
Registered User
 
asatxj's Avatar
2001 WJ 
 
Join Date: Jan 2004
Location: West Michigan
Posts: 998
Quote:
Originally Posted by Lustra View Post
Sounds like special ed to me Kids!!!
Hey watch it lad, I'm actually a Special Ed. Teacher!

Jeep Fleet Maintenance Director
'00 WJ, son's Jeep,'01 WJ mine, '04 TJ, brother's Jeep,00 WJ daughter's
Maintain your stuff so you don't have to fix your junk
ASAT= All Season All Terrain
asatxj is offline  
post #10 of 17 Old 09-26-2013, 06:04 PM
JTS97Z28
Registered User
 
Join Date: Mar 2004
Location: Plainfield
Posts: 281
If I had to guess I say something inside the differential. You would think wheel bearings would make noise regardless of load on the rear gears. Load changes in those gears and so does your noise, so I'm a bit surprised to see everyone pointing at wheel bearings.
JTS97Z28 is offline  
post #11 of 17 Old 09-26-2013, 07:22 PM
MattJeep
Web Wheeler
2003 WJ 
 
Join Date: Apr 2010
Location: Manteno, IL
Posts: 1,166
I have the same noise, except mine starts from any speed. Its more prominent when I'm off the gas. I removed the front driveshaft with little change. I think its the pinion bearing unfortunately. Dont know if I wanna fix it or buy a non Varilock 30, put an Aussie in and swap in a 242.
MattJeep is offline  
post #12 of 17 Old 09-26-2013, 07:34 PM
StormChaserTim
Registered User
2000 WJ 
 
Join Date: Sep 2013
Location: Wichita
Posts: 113
Matt, your V8 should be equipped with the D44. Mine is.

See if this applies to you.....
http://wjjeeps.com/tsb/tsb_wj_030300.pdf

Tim

2000 Grand Cherokee Limited 2wd, 4.7L V8 - It's blazing fast, blue, and the heap of Jeep.
2002 Dodge Ram Quad Cab 2wd, 4.7L V8 - Hailstoned, windshield cracked, storm chasin' truck. But dependable.
StormChaserTim is offline  
post #13 of 17 Old 09-26-2013, 07:41 PM
MattJeep
Web Wheeler
2003 WJ 
 
Join Date: Apr 2010
Location: Manteno, IL
Posts: 1,166
Thank you Tim, I think that would only apply to 99-2000? Mines a 2003. I'm pretty positive its coming from the front. But again, thanks for the possible free fix.
MattJeep is offline  
post #14 of 17 Old 09-26-2013, 08:15 PM
StormChaserTim
Registered User
2000 WJ 
 
Join Date: Sep 2013
Location: Wichita
Posts: 113
Oh, whoops....!

I was telling you one thing, and responding to the OP too, lol.

Tim

2000 Grand Cherokee Limited 2wd, 4.7L V8 - It's blazing fast, blue, and the heap of Jeep.
2002 Dodge Ram Quad Cab 2wd, 4.7L V8 - Hailstoned, windshield cracked, storm chasin' truck. But dependable.
StormChaserTim is offline  
post #15 of 17 Old 09-27-2013, 03:02 PM
Lustra
Junior Member
 
Join Date: Sep 2013
Posts: 69
Then you know what I am talking about.

Quote:
Originally Posted by asatxj View Post
Hey watch it lad, I'm actually a Special Ed. Teacher!
_______________________________________
Quote:
Originally Posted by newfieZJ
We may have gotten off to a bad start , but , you are one ignorant SOB
Yes , the mileage is stored in the PCM , it's only available through a DRB scan, it is irrelevant to 99% of jeepers
What about the other 1%?

________________________________

Silly Hillbilly
Lustra is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome