I have a 2009 F250 5.4 4x4 with auto tranny. I pull a 28' travel trailer occasionally. Been looking at purchasing a programmer/chip and wondering about which one to buy. Pulling the TT it seems the tranny shifts a lot. Any suggestions????

 

I have a superchips tuner on my 08 and it definitely helped power but not with shifting. It will still shift plenty. Just out the petal to the floor and let it sing. They love rpm. Doing a gear swap will help way more putting the power to the ground but can cost a few thousand dollars. I plan on doing 4.88 soon which should help towing my 6500# TT a lot

 

Get a custom tune from 5 Star.

 

Another vote for 5 Star tunes.