pkok so let me ask this then.....my tranny is fairly new but i dont thinmk the solenoid was ever replaces.  when our cars are ion OD and you drive down the highway if you tap the brake lightly the rpms raise a litle bit.  well mine does that on its own every so often.  it seems like is locking and unlocking or something.  could this be a reason for that?  if i unplug the TCC will i notice a difference to tell if thats the prob?  thank guys