[COBESGT]

So I really hadn't noticed this in the past but it seems to of gotten worse as of lately (maybe I'm just more in tune to it?). When I get up to higher speeds and under heavy acceleration, there is a really bad vibration, almost like a tire is out of balance. The vibration is not in the front, as it can not really be felt in the steering wheel, it's either coming from the middle or rear of the car. I was thinking about doing a tire rotation to see if it changes at all, but then I was thinking that it could be coming from the driveshaft. Anyone else ever experience this same type of concern? All help is appreciated.

[TestMe]

dont know if this is ur problem but mine did the same thing. i had spacers in there from the dealership. took it to a local tire shop they removed em and no problems since.

[tommyroc]

Before you drop a few hundred on a driveshaft why don't you have your tires checked, check the condition and the balance that will be the easiest and cheapest thing to do first.

[Wind-Farmer]

I removed my spacers when I had a vibration, they did nothing. I had my tires realigned with a GOOD machine and the problem was fixed.

(note my vibrated fresh off of a balance, ford ordered a new machine and re did it bam, perfect)