Using a 2011 Ford F150 as a tow truck???

I leave mine in D unless it is 'hunting' a lot -- shifting back and forth every couple minutes or so. I've found that in T/H, both my F150 and my GM do a pretty good job of eliminating hunting. Of course, the Ecoboost can tow along in 6th in most conditions, speed permitting, so it has been less of an issue w/ my F150. My GM never even gets to 6th gear when towing anyway, unless I'm going downhill, so it isn't much of a problem there, either.

Good luck.