Hum/vibration from rear?

T

The Adam Blaster

NAXJA Forum User

Location

Alberta

• Oct 24, 2006

• #1

The last week or so i've been getting a low-pitched hum in conjunction with a very slight vibration from the back half of the Jeep.
Seems to only happen when i'm on the gas. But, i don't have to be accelerating, just keeping a constant speed will make the noise.

As soon as i let totally off the gas, the noise stops.

Any ideas what i should be checking? Easy things first please.

 

S

Slo-Sho

NAXJA Forum User

Location

The 2nd most regulated state.

• Oct 24, 2006

• #2

OOh OOh! U-Joint!


:idea:

 

T

The Adam Blaster

NAXJA Forum User

Location

Alberta

• Oct 24, 2006

• #3

I was thinking u-joint, but in the past when those have gone on the d-shaft, i'll get a bit of clunking when i shift from my forward gears to my reverse gear. (Automatic tranny)

 

A

AlohaBra

NAXJA Forum User

Location

Northern Cal

• Oct 25, 2006

• #4

Slo-Sho said:

OOh OOh! U-Joint!


:idea:

Click to expand...

Do you have a lift kit? Does it happen at 35 MPH (sorry USA here)? Year of the XJ..?

 

T

The Adam Blaster

NAXJA Forum User

Location

Alberta

• Oct 25, 2006

• #5

It's a '98 and the noise happens from the point of initial acceleration.
I do have a lift (3") kit on it, as well as 31" BFG M/T's.

I haven't checked if the noise occurs at 35 or greater speed, but i'll try that tomorrow.

 

T

The Adam Blaster

NAXJA Forum User

Location

Alberta

• Jun 13, 2007

• #6

Little update on this:

It ended up that the rear carrier and gears were a little chewed up. I ended up getting some work done and had a Detroit installed back there.

 

jeeperjohn

NAXJA Forum User

Location

Temecula, CA

• Jun 13, 2007

• #7

So you got a hummer in the back of your XJ? NICE!!

 

J

jfiscus

NAXJA Forum User

Location

Middletown, OH

• Jun 13, 2007

• #8

The Adam Blaster said:

Little update on this:

It ended up that the rear carrier and gears were a little chewed up. I ended up getting some work done and had a Detroit installed back there.

Click to expand...

I just saw this post & was gonna say your bearings are shot in your rear end. But, it looks like you already found this out. I got an XJ with the same problems, I'm replacing the rear end.