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.