Thanks to everyone who contributed to this thread! I experienced the dreaded shudder yesterday in my 02 SCREW with 105k miles and immediately thought I was in for a transmission rebuild. Found this thread last night and managed to get the Service Engine Soon light to flash this morning on the way to Advanced Auto to pick up a new Motorcraft coil. Back at home, my code reader picked up a P0302 code (misfire on #2 cylinder.) 15 min under the hood and she's running like new again.