The service manual for the '03 says the torque on the tranny fluid plug should be 22 - 29 ft-lbs... identical to the oil pan plug.
Just tighten as much as you do when you change the oil and you'll be fine.
Edit: Whoops, read your post wrong. The pan bolts should just be hand-tightened with a socket on a screwdriver handle. The engine oil pan bolts are spec'ed at 6-7 ft-lbs of torque, the tranny pan should be similar.
Edit 2: When I changed my fluid and filter, the replacement gasket I got didn't fit the pan. The old one was in good condition, though, so I just cleaned it off and used it again. Don't be quick to throw yours out if this happens to you too.
Last edited by MattyDK23; Aug 19th, 2008 at 12:48 AM.