I have a 2004 F-150 FX4 with 70,000 miles and I am having vibration problems. When I pull out with my whells cut left or right it vibrates in the rear end. If i pull out straight i have no vibrations. Just with the wheels cut. I have noticed that it only does it after I drive it a couple of miles. its like when something gets warm it starts doing it. I have had the rear end, transmission, front end , and transfer case checked and fluids changed. If any of you all have had this problem please help me. this is so aggravating. Thanks

 

I am having a similar problem with mine but I sounds like your problem might be the cv joint. Just a guess? Is it making any kind of noise?

 

No noise. It's driving me crazy !

 

sounds like the clutch packs in the diff. Mine did it, added friction modifier in and it stopped

 

Mine has 119,000 miles and only does it when I back out of the driveway and take off with front turned to the right. Only does it when I first get it out in the mornings, other than that, no sound at u-turns either direction.

 

Thanks for the help !

 

Mine started doing that a little while ago and it only happened every once in a while until this morning. My transmission went out in the way into work. I started looking into it more and the 2004's have a transmission problem that starts around 77000 miles and goes out sometime around 90000. You can google it and see that there are a lot of comments about it. Ford denies that there is anything wrong and it's not a manufactor issue. If I was you and I wish I knew sooner take it and get it looked at as soon as possible or your gonna be out 2500-3800 dollars. I'm speaking from experience.