shutter taking off???

[dmbrichie]

I have got an 05 psd with the 6.0. Truck has an 8" Fabtech lift with fox shocks all around, bigger leaf springs, and air bags in the rear. Truck rides really nice and was done right but sometimes i feel a shutter when taking off from a dead stop. Truck vibrates kinda weird... Any ideas or suggestions??

[goodriddance]

I looked here quickly 6.0 PowerStroke bulletins

didnt see anything you might want to check it out a little closer, when I was losing an injector once I had a real bad shudder

[DKR]

On take off..are you doing boosted launches or you just talking about normal driving?

[Dave]

where does it feel like the vibration is coming from?

[dmbrichie]

just normal driving..and it feels like its coming from the rear of the truck..

[Dave]

could be from the carrier bearing, especially being lifted. was it shimmed

[goodriddance]

you check your Differential fluid?

[DKR]

Mmm..wonder if it is axle hop? But, I think that would only happened on a hard launch.



EDIT: Good thought Dave.

[dmbrichie]

yes it was shimmed... didnt check diff no...

[Dave]

i would check the diff fluid just to be safe. Here is another possibility as well

This is a ford TSB

Vibration/Hop at 40-48 MPH, Truucks with Trailer Hitch:
Some 2005-07 F-Super Duty trucks with long wheel base (over 156") may exhibit what is described as a hop on smooth or coarse road surfaces. Although Ford conciders this to be characteristic of trucks with a GVW of over 8500 pouns, some drivers may be more sensitive to the condition. There is a damper kit (P/N 5C3Z-5D008-A) available to correct the hop under the described conditions. It will not correct shimmy, harsh ride or vibration after hitting bumps. TSB #07-5-11