Thanks for the info. Unit is "still" under warranty. During Oct. dealer inspection, I attended the car after pan removal. The mechanic had opened one filter for inspection and I observed nothing unusal either from the filter or in the bottom of the pan. Had both filters replaced and fluid topped up. Have had only one incident since and shudder was minimal. Unfortunately, the unit is parked for winter and will not be out on the street 'till the roads are dry. Will offer your suggestion to dealer for consideration.