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So I took the Commander to a local Jeep dealer for diagnosis. There were a few days between the time I took the Commander from the old service station and my appointment date at the dealership last Thursday. I drove it during that time to listen to the engine run to see if anything changed. I hear the same tapping sound as before, no better no worse. The tapping slowly quiets down as the manifold heats up. I desperately tried to hear sounds from the bottom of the engine to validate the old stations claim. Every once in a while I thought maybe there is a knock. But I really could not tell.
During one of my rides I had another incident where the vehicle suddenly turned left on it's own. Shortly there after it felt like the 4wd system went into 4 low. A whine started in the rear that progressively got louder.
When I dropped it off asked the service manager to have both issues looked into.
The diagnosis on the engine is no bottom end issues, it just needs the manifold bolts replaced. They plugged her in and ran a diagnosis, a sensor in the 4wd system was going bad causing the right front to get power. That was replaced and fixed the turning issue. The rear end sound is the differential locking up, they're not exactly sure why but stated the rear including the axles need to be replaced. They recommend a rebuilt unit from Jasper, roughly $4,500.00 installed. I did a little research and it appears the differential locking damaging the axels is a relatively common issue. It's not wear and tear. I had the Service Manager turn it into the warranty company, so far so good they have approved the work.
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