Excellent info,but I'm assuming us guys with a Roush or Whipple would still need to re-tune after replacing the leadfoot and parts...Really dont want to deal with our local Ford dealership,so trying to see if I should just get my mechanic to do a Trans flush......or open it up,bite the bullet and let him do a leadfoot replacement....I'm sure he will know,but like to have some info when I bring truck in just in case.....they are great,been using for 20 years...but not like they work on a Supercharged Raptor every day..in fact,mine is only they have even seen..LOL!