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Question

jeep grand cherokee i was driving on the highway in


Sent to Car Experts December 29, 2005 11:28 p.m.
97' jeep grand cherokee: I was driving on the highway, in cruise-control, doing 80mph. Every time I would hit a slight incline, it would make a noise from underneath, more to the rear than the front. I'm thinking transmission(clutch, maybe), or rear-end. I turned around and hoped I could make it home(200 miles). I did. While driving home, this was the best diagnosis i could come up with. I figure I'm probably wrong. can I get some proffessional advise.
                                         &nbs p;              thank you, Malcolm

Optional Information:
1997 Jeep grand cherokee 6 clynder

Already Tried:
nothing
Customer (name blocked for privacy)
Status: Closed   Value: $9   
Info Request
December 29, 2005 11:36 p.m. (7 minutes and 40 seconds later)

Hello, Malcolm!

Can you describe the type of noise you were hearing? Did it seem more related to engine load, or to vehicle speed? Did you notice any change when tuning or going around curves?



Edited by Steve7654 on December 29 2005 at 11:38pm
PictureSteve7654  -- Auto Service Technician -- 99% Positive Feedback on 1640 Car Accepts
27 yrs ASE L1 Master Technician, Service manager
Reply
Sent December 29, 2005 11:58 p.m. (21 minutes and 49 seconds later)
every time I would here the noise, it sounded like a short, slit-second, grinding. it did not effect speed. some-times it happened as I would pull off from a stop. I could not pin down exactly where it was coming from, but I think I can rule out the engine. It did not happen during curves, only during acceleration

Edited by Customer (name blocked for privacy) on December 29 2005 at 11:59pm
Customer (name blocked for privacy)
Answer
December 30, 2005 1:02 p.m. (13 hours and 4 minutes later) 		ACCEPTED Check Mark

What you are describing could be a failing pinion bearing in the rear differential ( a very common occurrence on thsi model).

I would suggest checking the pinion bearings for any looseness; or even puling the front one out of the housing to check for any signs of overheating or damage. Jeep differentials commonly experience pinion bearing and differential carrier side bearing failures that cause similiar noises.

I hope this is helpful; if so, an accept would be most appreciated! thanks!
PictureSteve7654  -- Auto Service Technician -- 99% Positive Feedback on 1640 Car Accepts
27 yrs ASE L1 Master Technician, Service manager

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