Ok, so.. I've always had this question. Say your towing 8000 lbs of load behind ya. And you reach a nice grade. Not a super grade which makes you wonder if your driving up the side of a building, but a nice even grade. Your engine is starting to bog a little. In a 350TBI 700R4 with 3.73 gears and 33" tires would you: Give it more gas, since if it wanted to downshift, it would do it automatically, or Shift into D, slow down to normal RPM speeds, wait until the grade passes Ok, now if it was the same combo but with a 6.2, would you do the same? or lug it through? Swap combos, lets say you have a manual tranny (in my case a nv4500) would you tow in 5th? Or never go past 4th? Or would you just keep it in 5th and just pedal to the metal?