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Clayso, Master Automobile Technician
Category: Jeep
Satisfied Customers: 880
Experience:  ASE Master Certified Automobile Technician. 30 Years Experience.
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I purchased a jeep tj 2004 I hear a humming noise coming

Customer Question

I purchased a jeep tj 2004 I hear a humming noise coming from the rear at 55 mph do you have any idea what it might be.
Submitted: 1 year ago.
Category: Jeep
Customer: replied 1 year ago.
Humming noise and vibration
Expert:  Clayso replied 1 year ago.

Hi James, I'm Clay a certified master automobile technician with 30 years of automotive repair and diagnostic experience.

From your description most likely the pinion bearing is worn and humming. If the hum and vibration goes away when the vehicle is coasting at 55 mph, pinion bearings are the most likely cause. Have the rear differential fluid checked and inspected for bearing and bearing race particles in the fluid.

I hope this information is helpful. If you have any questions or comments let me know.

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