So installed the bullydog today and holy christ, it woke up the ole 4.6 like crazy, shes a tire spinnging speed machine. pulled my 32ft sailboat like it was my sled in the bed of the truck im super impressed. and im averaging 22mpg now, i think thats pretty good!

 

Only way I can get my tires on my 5.4 to spin is power braking...
And I have several mods
But once my 4.11s get installed, then they will be all over the place!

 

I think you may just have good tires. I cant stand my dynapro atms. they squeal on turns and chirp on takeoff if I press down more than just idling forward. If I jump on the skinny pedal from a stop, (nobraketorque) she squeals, walks sideways a few feet and leaves some smoke.

 

ive got wrangler at/s on my truck. i hate them, they are so soft and wear down alot faster when i drive to ottawa or london to see family >.<