Dave,

Have you checked the Transmission solenoids? The reason I am asking is that
this is a very simple thing to do assuming you have a 7mm socket and own or
can borrow a Digital Multimeter.

To check the solenoids, remove the electrical connector from the top of the
TAAT transaxle. This is located in front of the driver side and to the rear
of the battery tray. You will see a single 7mm bolt that holds this in
place. Remove the bolt and pull the plug. Make sure everything is clean and
dry.

Take the DMM and set it to the low ohms range. Measure the resistance across
the exposed pins in airs: 1&2, 3&4, 5&6, 7&8, 9&10. The numbering I have
provided is starting with the passenger side rear nearest the firewall. All
of the resistance measurements should be nearly identical and if the car is
"cold" somewhere in the 4 to 6 ohms range. All of mine measured 4.4-4.6
ohms. If you find one that is much higher or even nearly zero it signifies a
bad solenoid which needs replacement. I am guessing that there is a TCC
solenoid that might have gone bad.

If this is bad, the solenoid part cost is $56 at Saturn and you will also
need to replace the trans cover gasket at another $20. It is not too
difficult a job, probably about 3-4 hours and only requires a 7 and 8mm
socket and a torque wrench. The worst part is scraping the old gasket and
being careful not to get any of it in the exposed trans body.

Good luck and let us know how it goes.

Bob