I recommend you have all these sensors check.
Mass air flow, throttle position, vehicle speed, intake air temperature, engine coolant temperature, brake On and Off switch. These inputs are used by the transmission control module to command solenoids/TCC etc to provide the shifts/lock/down etc. Before you condemn the transmission
Or get the Tranny pressure tested.
Thursday, November 15th, 2007 AT 6:00 PM