I am new here and the new owner of a 05 GT 4.6/auto lightly used (19000) 1 older owner. My question - it has a long lag from pushing on the pedal until the car will move, when it does it is all at once, hold on!! It is almost impossible to take off gently (some times it prudent to do this). Is this common? I have a F-350 diesel that is much the same way. It is factory stock.