Hello im having trouble figuring out what is making a buzzing/humming type noise in my front end. It only makes the noise when coasting but stops when i press on the brake or when i accelerate. My jeep only has 4wd as an option. I replaced the front axle and put new wheel bearings on it. Also i replaced the driveshaft and the transfer case. The noise was greatly reduced when i replaced the hub assemblies but that a couple days later the noise came back. The noise is coming from underneath the driver side and just recently it started making a clunking noise underneath that side. The clunking noise only comes when i tap on the gas pedal or go over a bump. I just recently replaced the sway bar end link bushings. If anyone has any clue as to what these noises may be please respond.
Thank you

 

Check the engine mounts

 

^^what he said^^