I'm having an issue with with a noise comin from under the jeep..can't figure it out..it does it when I let out on the gas there is like a growling noise when I go down a hill..or even when u barely push on the gas it will do it on demand..i have 3 inch lift from rough country and it was Makin the noise before I lifted it but now it's gotten worse..thanks

 

Only when your moving or even sitting still.

 

Happens only while moving

 

Check your differentials for loose berrings and oil.

 

You have a bad pinion or axle bearing.