Hi all, I have a 2007 F150 STX 2 wheel drive that vibrates between 43 and 54 MPH only. Very consistent and it doesn’t happen every time, but I’d say above 90 percent of the time. Now I’m getting the run around with mechanics about what the problem is. I can see the bed of my truck vibrating and I can hear it, sounds like I’m driving over rumble strips.
I had the transmission, transmission cooler, a coil pack, intake manifold, and throttle body replaced by the Ford house in January of last year. The shaking began a few months after the replacement. I had the tires rotated. No change. I had the tires replaced, no change. A few months ago the front left wheel bearings and both lower ball joints were replaced. No change. It has not gotten any worse or better, and every mechanic I have talked to has claimed something different but it’s all theory because they can’t figure out what it is, they just want to start replacing things without being sure.
Center driveshaft carrier bearing
Torque converter shudder
Turning off overdrive makes no difference.
Thanks in advance, Chris.