Humming sound from rear end .. - JeepForum.com

 
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post #1 of 4 Old 06-27-2006, 07:52 AM Thread Starter
dspmans_04_X
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Humming sound from rear end ..

I was wondering what would be considered as "normal" sounds or noises from a Jeep. Being a first time owner and getting used to the differences. I have an 04 "X" and when giving it throttle at any speed I hear a humming noise from the rear end (not the tires). If I let off the gas the sound dissappears. It's an automatic with a lift on 33" tires. I just purchased the vehicle a week ago from a dealer and they have no info on the lift installed, so I don't know what has been done to it exactly. I have tried to contact previous owner to get this information. It only has 28700 miles and still under warranty, but depending on how this lift was installed, I'm wondering if that will void anything.

Specs that I know, 4.0, automatic, 3.73, Pro Comp lift (unsure amount of lift, guessing 3 - 4 inch possible), 33 x 12.5 x 15 tires

Any info is greatly appreciated.

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post #2 of 4 Old 06-27-2006, 08:05 AM
HOSS1
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Sounds asif its been re-geared. At any rate the ring gear sounds to be going out. Pinion depth not set right.
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post #3 of 4 Old 06-27-2006, 08:11 AM
FlexyTJ
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Quote:
Originally Posted by HOSS1
Sounds asif its been re-geared. At any rate the ring gear sounds to be going out. Pinion depth not set right.

I'd like to know how you came to this thoughtful conclusion?



As for the sound, Jeeps have drivetrain noise. How much depends. Good luck determining what is a normal sounding jeep drivetrain over the internet

MK Motorsport & Fabrication
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post #4 of 4 Old 06-27-2006, 08:39 AM
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If it's a Dana 35, it's thinking about when it's going to implode. If it's Dana 44, it's thinking about when it's going to see a set of Superior axles.

Definition of Rubicon:
A limit that when passed or exceeded permits of no return and typically results in irrevocable commitment.
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