artin64

hi, guys i have been looking around to see if i could get an answer but i didnt find any posted, i hope it is not a repeated question.
ok i have a 2002 GLE, about a mounth ago, when i pressed on the gas pedal just a little bit it would downshift and go fast, but now i have to go really hard on the pedal (almost floor it) to get the car to downshift and go faster, the RPM basically just keeps moving slowly until the it reachers 4k and after that it is really fast. i dont have lack of power, steel when i floor the pedal the car pullls hard.
if anyone has an idea what the problem could be please leave a message.
thanx,
artin.