Hi...I have a 2000 Ford Expedition 4x4 5.4. I get a vibration (shutter) when I take off from a dead stop - straight line acceleration. It is usually gone before I hit 15 mph. I did a tranny flush but the problem is still there. Any suggestions would be appreciated.

 

That could be a lot of things. I would first check for a u-joint or driveshaft problem. The driveline pinion angle can cause a vibration on takeoff when it is off. Check your motor and transmission mounts, vehicle ride height, etc..