Anyone experiencing a vibration from auto transmission only when engaged in forward or reverse gear. In park, it is as smooth as can be.

I have a 2001 F150 SC 4x4 5.4L.

Thanks.

Dealer has looked at and said nothing was abnormal. What a surprise!

 

I have the same problem. In the morning, my truck vibrates in reverse and drive but not in park. After the engine warms up it goes away. As near as I can figure, there the vibration is somewhat dependent on rpm. After warm up I can recreate the vibration, although not as extreme, if I raise the rpm's to about 800-900 rpm. I have no vibration at 600-700 rpm. I can pay more attention to the exact rpm if you want and report back.