Hi,
I've a 2011 F-150 Ecoboost with a tow package.
Tow rating is 9800lbs.

I've a trailer whos GVWR is 7400lbs.

I'm noticing an audible/phyiscal Clunk while in Tow/Haul mode going down hills and the transmission is downshifting from,

6 - 5 or
6 - 4 or
5 -4.

this doesn't seem right to me.

Any feedback would be helful.

thanks

dave

 

Sticky yoke on the driveshaft?

 

Mine will occasionally do the same thing down shifting to 4th gear when descending a hill in Tow/Haul or Cruise Control. It can be quite a jerk when towing 7500#.

Seems to be worse after a long period of non-towing, so I've always chalked it up to the tranny re-learning to tow ... if there's a fix, would like to know about it.