Strange noise after lift

[trailhead98]

Hey guys, I know this has been brought up a few times and I've searched around for some answers but have got to a conclusion.

So since I did my lift, when I let off the gas while driving I get a strange hum/slight vibration coming from what I think is somewhere around the front end but not sure. However when I'm back on the gas it goes away. Any kind of coasting or going down hills when I'm not on the gas I get this noise.

Reading some other threads, doesn't seem to be wheel bearings, I don't have zerks to grease up. Some people investigated there u joints thinking that might be the culprit. I'd like to know what the problem is and why when you lift the vehicle you get this problem...or if its even a problem. It just sounds bad and drives me nuts.

Any insight would be appreciated!

 

[Zachpins34]

Not sure if you saw an old thread I made about this a few months ago yet, but the SAME exact thing happened to me, just a few days after I got my lift on, it was driving me crazy. I thought wheel bearings at first too. I even thought something got loose and just rattled around, like a small washer. Its not biggie though, Its just the U joints. If you grease them a couple times they will be fine. Ever since, I haven't heard any squeaking at all and its been 4 months now. I guess its just because the angle of the drive shaft changes a bit and areas that dont have grease are now making contact? Not 100% sure, but that's my guess why it does that. But I do know its the U joints.

 

[trailhead98]

Not sure if you saw an old thread I made about this a few months ago yet, but the SAME exact thing happened to me, just a few days after I got my lift on, it was driving me crazy. I thought wheel bearings at first too. I even thought something got loose and just rattled around, like a small washer. Its not biggie though, Its just the U joints. If you grease them a couple times they will be fine. Ever since, I haven't heard any squeaking at all and its been 4 months now. I guess its just because the angle of the drive shaft changes a bit and areas that dont have grease are now making contact? Not 100% sure, but that's my guess why it does that. But I do know its the U joints.

Thank you for the response sir! And thats a relief...im gonna get under there and try to grease them up tomorrow and see if that makes the sound go away. And it sounds like that might be it. Kinda weird for it to be anything else...since it happened immediately after the lift.