1994 Jeep Grand Cherokee Humming/Roaring Sound

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?

7 Replies

SERVICE WRITER

MECHANIC
9,123 POSTS

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

RWBRANTON

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4 POSTS

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 6:31 PM

RWBRANTON

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4 POSTS

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

SERVICE WRITER

MECHANIC
9,123 POSTS

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.