It's been 10 weeks at the dealer and they still don't have a fix. Replaced the instrument control panel (extend warranty), Input and output speed shaft sensors, transmission control module (extend warranty), and PCM (warranty as long as I wasn't over 80,000 miles). The tires and rims are correct size for the model of the vehicle. The vehicle does not display any of the symptoms that would have warranted replacing of the above mentioned parts. The dealer thinks the gear ratio may be a problem and would like to replace the transmission.