I've got a 12 FX4 SC 6.5' w/Ecoboost. After 1K miles I began to develop a shudder/shake in the tranny-driveshaft passing through 1500 rpm. 4 dealers, 6 overnights and 2 escalations, I finally am told there is a design problem in the pre Jan 12 trucks. Fixed with frame mod to manufacturing process after Jan, but no solution for current owners with the probelm.

Anyone else experience the shudder? I replaced my 07 FX4 SC with this truck and LOVED it for the first 1K miles. Now I HATE driving it, especially in traffic (lots of cycles through 1500 rpm.

 

If there is no way for them to fix it there is always the lemon law option and they will have to replace your truck.

 

You may want to try the Roadmaster Active Suspension. It cured mine. Ford actually has no idea with these trucks.

 

I agree use the lemon law and get another new truck without the issue if they refuse to fix it.

 

I'll have to check out the RAS. Thanks.

 

Is this the same shudder that you get from the 1-2 upshift 20-30 mph? Yeah there is countless info on this. My 2011 5.0L does this and it is greatly annoying but to tell the truth, after 11,XXX miles I am used to it and it doesn't bother me anymore.

My dealer told me they can shim the pinion angle and this would make it go away when empty but it would come back when a load is on the truck and the suspension is compressed a few inches. No thanks, I will just live with it.