[dsramprat]

You've already checked the fluid level, and that is the first thing that should do. I personally have never had this problem, but have heard of it. I would look into replacing the two speed sensors on the transaxle. They're located on the driver side of the vehicle, forward side of the transaxle. The input speed sensor is located to the left of the manual shift lever, and the output speed sensor is located to the right of the manual shift lever. I don't know if they can be tested, but I don't think they're that expensive to replace.