Ok ... to update: checked the transmission fluid level ( and it is tranny fluid not gear oil; GM Synchromesh transmission fluid ) and, although it was slightly above the add mark, it's not critically low to a point to cause shifting problems. However, after taking the car on a short test drive I now am missing 2nd, 4th, and Reverse. Basically all of the gears on the bottom of the pattern. I checked a Haynes manual for this vehicle and find no mention of shift cable adjustment. There has got to be a Cavy gearhead out there who has encountered this before. Does any one know which cable affects 2nd, 4th, and Reverse?