My 2012 is shaking like ok a washboard road or wavy pavement. Had tires balanced still does it. Seems to be at it worst at about 50mph especially if held at that speed. It shakes the heck out of the passenger seat. Anyone have an issue like this? What was the fix?

 

When ever I've had a problem like that it was a tire with bad belts. Jack up each tire and turn it and see of the tread groves run true or rotate the spare to each position to see it it goes away, being it's shacking the seats start in the rear.

Denny

 

The tires are fairly new. However I will try that to see if that's the issue. The tires were just balanced. I'm getting a new set of tires tomorrow going to a mud tires.

 

It's what rvpuller said. Bad belt in one or more tires...it almost "hops", right?

I've had this problem with 2 sets of Michelin AT2 tires now (20"). You'll see a wobble in the tread if you jack it up and spin the wheel. Balancing it makes no difference.

These trucks are so heavy, one sharp bump on uneven pavement seems like it can destroy the tires.

 

That about says it. Can be pretty bad at times. Sometimes not as severe it seems or perhaps I don't notice as much maybe.

 

I'd be interested to hear if the new treads fix this problem for you. Good luck.

 

Mine does it too at exactly the same speed and its driving me bat shat crazy! To the point I'm considering trading! I've had tires balanced twice (Toyo A/T's factory size and yes dead nuts proper tire pressure 65psi) and new Bilstein shocks. Truck was used when I got it and did it with the factory Michelin LTX's also. One of the reasons I got rid of them too. Apparently this is a chronic problem with quite a few Ford SD's. Just Google it and see for yourself. It has been called a harmonic bounce\vibration and most never find a cure. And as fate would have it, 50 mph is my average speed on the roads I commute most of the time. I'm OCD and love my truck, so when I saw this thread I was sure hoping someone had a cure. Guess I'll just keep looking. Or trading soon if no cure is found.

 

There has to be a cause for it to happen. My new tires go on Monday afternoon so we will see. Wish I had them sooner but the guy and his wife had a baby so I'd rather see him with his family. My 05 f250 don't do that and my brother in laws 08 f250 don't have the issue either. If it's common to a bunch of trucks then they all probably have the same issues. Crossing my fingers it's tires but your right I've read allot of people talking about having similar issues and it's not the tires.

 

Update. Finally got tires done today so far the ride is much improved. Now to figure what psi to run them at to get best wear out of them. I'll have to hit a parking lot in town and chalk them.

 

How is everything going after having the tires for a while?
What tires did you go with?

 

Ive got about 600 miles on them everything still riding good. I went with the federal corugia mt. Very aggressive tire but that's what I really need mostly swamp and always wet soft mud here.