I've noticed a small leak at my bell housing on my '94 Explorer Sport. It has an automatic transmission. I was towing a trailer from Windsor to Toronto and back and noticed a puddle in the drive way after it sat for about 30 minutes. I added fluid the next day and there was only a few drops on the ground. The engine and trans were under a pretty heavy load for 350 kms. both ways. any ideas of what has happened. Thanks, Brian.