I have an 05 F150 2WD Auto, 4.2 (work truck)...I have owned it since new, no accidents , no towing...used as an "extra car." It now has about 36K on it. About a month ago, I noticed a vibration felt throughout the vehicle. You definitely feel it in your backside and the rear of the truck. I have since purchased new tires, roadforced balanced twice, and also just had the front and rear u joints replaced. (the shop said the center was rather difficult to replace and would require sending the driveshaft out to replace) Nevertheless, the front and rear were replaced. They said the center u joint "seems" fine however.

The tires and wheels are pretty much perfect. The vibration begins around 30 mph or so and is most evident to around 50 mph...both on acceleration AND deceleration. I am wondering if anyone has any ideas as the deceleration component has me confused. I appreciate anyone's input.

 

Drive shaft vibration maybe? I'm not sure about these trucks but I know older vehicles have counterweights on the drive shafts for balancing.

 

Hi, you should check the parking brake. There are these jaws at the wheels, that the cable connects to, that gets rusty and gets stuck causing the vibration. At least in my case that was the problem. I just took them out, sanded the rust away and used silvergrease and no more vibration problem after that, until now my rear U-joint got busted but thats another story.

 

You ever find out anything about your problem man?

 

As we speak, it is at the shop. Both an independent and the dealer are saying the drive shaft. The independent had the two piece shaft balanced twice, but still vibrated...but much less. Apparently, the shop owner is now looking into why the shaft will not re balance perfectly. All three U joints were also replaced. The carrier bearing, according to everyone, is fine. Only about 37K on the truck. I should know more within a few days.

 

Ok yea man let us know. Sounds almost exactly what my truck an I'm in a lost for words what it is on mine an running out of money to replace this an that.

 

I agree with Mr.BrrIce. Check the E-brakes. They stick on and cause rear end shake. Mostly happens in northern climates because of the road salt. I drive two 2005 F-150's and it happened on both of them.

 

Check the e-brake...

 

There are these jaws at the wheels, that the cable connects to, that gets rusty and gets stuck causing the vibration.