Possible muffler leak? - JeepForum.com
 
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post #1 of 6 Old 05-29-2015, 01:15 PM Thread Starter
brickred
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2004 TJ Wrangler 
 
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Possible muffler leak?

Hi all, I figured I'd ask here first before I took it in. I was driving my wife's 2012 compass the other day and when I got onto the highway, it sounded like a motorcycle was hiding a blind spot, there was no motorcycle. I put it in neutral and reved the engine, the sound stayed constant. When I hit the off ramp, it gradually wound down and went back to normal while I stayed on the surface streets. After driving it for a while, I've determined it sounds like an exhaust leak but it's pitch and intensity is consistent with how fast I'm going, not rpm. It doesn't start until I hit highway speeds and doesn't go away until I've almost come completely to a stop. Just wondering what your thoughts on this are or if anyone else has experienced this.

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post #2 of 6 Old 05-29-2015, 09:59 PM
bigkat91
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Have you recently put new tires on the Jeep. You say engine rpm doesn't affect noise. Could a rear wind seal have failed or rolled down. Just my two cents.

2011 Compass 120K miles
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post #3 of 6 Old 06-05-2015, 07:07 AM
JeepCACares
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Quote:
Originally Posted by brickred View Post
Hi all, I figured I'd ask here first before I took it in. I was driving my wife's 2012 compass the other day and when I got onto the highway, it sounded like a motorcycle was hiding a blind spot, there was no motorcycle. I put it in neutral and reved the engine, the sound stayed constant. When I hit the off ramp, it gradually wound down and went back to normal while I stayed on the surface streets. After driving it for a while, I've determined it sounds like an exhaust leak but it's pitch and intensity is consistent with how fast I'm going, not rpm. It doesn't start until I hit highway speeds and doesn't go away until I've almost come completely to a stop. Just wondering what your thoughts on this are or if anyone else has experienced this.
brickred,

If the symptom is occurring regularly and can be duplicated with ease, a diagnosis would be an efficient course of action.

Dave P.
Top Care Specialist
FCA Canada
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post #4 of 6 Old 06-05-2015, 09:49 PM Thread Starter
brickred
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Just dropped it off to get a diagnosis, I'll let you know what I find.
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post #5 of 6 Old 06-06-2015, 02:46 PM Thread Starter
brickred
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Join Date: May 2015
Location: Omaha
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Ok, the mechanic is saying there may be a bad bearing in the rear differential, from what I'm hearing I'm tending to agree with him. Anyone know if the rear diffs are serviceable? Any good information resources? I can't think of any other moving parts on the back end that could potentially make that noise.
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post #6 of 6 Old 06-24-2015, 12:32 PM Thread Starter
brickred
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Location: Omaha
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Sorry it took so long to reply. The resolution is bad wheel bearings on both rear tires. I hope this doesn't mean I'm going to be replacing these every time I need new tires....
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