1994 Jeep Grand Cherokee Humming/Roaring Sound

Tiny
RWBRANTON
  • MEMBER
  • 1994 JEEP CHEROKEE
Hi there,

I have a 1994 Jeep cherokee, with 216kms on it. It has the straight 6 in it. 4X4. With I think a Dana 35 diff in the rear.

Here is my problem, when I am driving the truck and I hit speeds around 60mph, I am getting a humming/roaring sound coming from the rear. The sound starts around 50mph and stays tied to the truck speed/engine speed. If I off the acclerator and let the truck coast the sound dissappears.

Could this be from the diff, or from a u joint?
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Saturday, May 12th, 2007 AT 12:16 PM

7 Replies

Tiny
SERVICE WRITER
  • EXPERT
I doubt a u-joint. U-joints may clunk when first put into gear and will vibrate more so than hum/roar. I would be more inclined to think rear end. Have you checked the fluid level in it?
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Saturday, May 12th, 2007 AT 12:24 PM
Tiny
RWBRANTON
  • MEMBER
Yes, I have replaced the fluid in hopes the sound would dissappear or atleast change. But nothing.
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Saturday, May 12th, 2007 AT 12:26 PM
Tiny
SERVICE WRITER
  • EXPERT
Was there any silver or shiny metal fragments in the fluid?
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Saturday, May 12th, 2007 AT 3:02 PM
Tiny
RWBRANTON
  • MEMBER
A little yes. But not much. And very small flakes in the oil. Kinda like fools gold.
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Saturday, May 12th, 2007 AT 6:22 PM
Tiny
SERVICE WRITER
  • EXPERT
Best bet to to get it up on a lift and run it to see if it is the rear end. Kinda starting to point to a rear end problem.
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Saturday, May 12th, 2007 AT 6:31 PM
Tiny
RWBRANTON
  • MEMBER
Thanks for all your help, I will bring it to a diff, place and see what they say. Good Luck in the Game tonight. You proablity wouldn't have helped me if I told you early. But you are talking to a Ottawa fan, living in Ottawa. Go SENS GO!
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Saturday, May 12th, 2007 AT 6:42 PM
Tiny
SERVICE WRITER
  • EXPERT
If the Sens keep playing as they are and Buffalo does the same, you guys will enjoy a championship.

I do recommend this company for the diff:
http://www.jasperengines.com/diff.htm

I expect it to go 7 games. It should be great series.
If you guys start to lose, just don't cry about Alfie this year.


http://www.2carpros.com/forum/automotive_pictures/30961_Bigsmilepig_7.jpg



I have actually spent some time with a few Ottawa Fans. Seem a lot like
Buffalo folks to me.
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Saturday, May 12th, 2007 AT 6:50 PM

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