[THE NEW GUY]

good new: your tranny is OK. replug the dropping resistor.
When was the last time you change tranny oil?
This problem bothers me some time ago.
Cleaning the MAF sensor with a "no residues" cleaner helps a few, but, if problem continues, then do the electronic thing for the TPS.
TPS is located behind the throttle body plastic cover, oposite side of the gas steel ropes.
Do you have the "forced power switch"?
Basically this problem is typical of a bad TPS. Is not the position of the TPS but the linearization of the signal. If you can, change this sensor and problem solved. If you would like to save some money, try the electronic ad I told you before.