My Mystique now has a new transmission. Took it to a transmission shop, where the tech there determined that neither 2nd nor 4th gears were working. For very understandible reasons, I couldn't nail him down on a firm estimate of how much it would cost to repair/rebuild the transmission, or how long it would take, so I opted for the more certain and more quick, albeit most likely more expen$ive route of having him order another transmission from Ford and installing that. With any luck, and some reasonable maintenance, I shouldn't have to worry about transission troubles again for at least another 160,000 miles.