I have a 2005 Ford Five Hundred, 6 Speed tranny, engine 3.0, 4 valves per piston with only 44,000 miles (first round).

I love this car, but one serious condition has developed when flooring the pedal to engage the Passing Gear, we all know that it should shift to a lower gear to "jump" forward and pass the car in front of you.

Well, instead it seems to jump to Low gear and then kicks and jumps and jerks and it seems it will tear the engine and transmission supports until I release the gas pedal and back to normal as long as I don't intent to floor it again.

Can anyone advise me on this awkward problem I will appreciate this tremendously