Hello all, new to the site but love it so far. I just purchased a 2008 F150 4x4. It is a 60th anniversary edition. HOWEVER, I have a problem already. The truck has 1900 miles on it now, and i just had a leveling kit put on. I elected to go with simple drop shackles for the rear leaf springs and not mess with the front end. They only lowered the rear about 2" and it looks great, but now when im starting off from a stop, there is a noticeable vibration coming from the rear of the truck. The guy at the shop insists the shackles would not cause any angle problems with the driveline and surely to god the ujoints last longer thanm 1900 miles. Any ideas before I take it to the dealer and hassle with the headache of having them repair something or is it a simple fix that im unaware of??? Any info is much appreciated.

 

sounds like you need some shims for the rear.....

 

I'd be surprised if the dealer/Ford will honor the warranty when a problem arises from such a modification. The truck was fine until you modified it. Why should Ford bail you out?