Is there anyone here in the DFW area that can recommend a good shop for diagnosing drive train noises. I have an 18 f150 XLT SC, 2wd. At highway speeds theres a vibration/hum coming from what sounds like the right rear to me. Ive replaced and re balanced tires and replaced the driveshaft and the noise is still there. its at its worst from 60 to 70 MPH but at times i can hear it come in about 45. Ive had two different shops say tire noise. IT IS NOT TIRE NOISE. it started at about 15000 miles into the last set of tires and is still there. Last set were Continental Terrain Contact HT's, This set is Michelin LTX M/S 2"s. Not cheap tires. Thanks forany help.

 

I have a similar vibration and have done the same attempts at a fix with zero success. I am wondering if may be related to the large weight that's attached to the transmission. I think it's there to cancel out a harmonic vibration inherent in the drive train. Increasing the weight may fix it along with ensuring the transmission mounts are in good condition and tightened correctly.