I am noticing a shudder when I turn from a dead stop. It appears to do it mostly while the rearend components are cool. This truck has 2500 miles on it. Will the friction modifier fix this problem or does it need more attention?

 

I have been noticing the same thing in my 04 Super Crew with approximately 6500 miles. The first time I noticed it was probably about 1500 miles ago - now I have convinced myself I am developing a slight vibration through the drive train at relatively slow speeds. Haven't yet had it into the dealer - are there others experiencing this same scenario?

 

I'm experiencing the same thing on my 04'

 

I had the same issue on my '04 XLT. I'm assuming all of you have a limited slip rear diff. The problem is the clutch pack. It's covered by warranty just take it to your dealer, and they will order the parts and replace the pack.

Ford knows about this and has a TSB on how to fix it.