I bought a gasket/filter kit about a year ago from NAPA. After sizing up the situation, I elected not to change the gasket because it looked way too difficult. The new filter came with the gasket kit, so I assumed it was directly behind the side pan.
Update - Dealer looked at the car yesterday and said they found that some of the bolts needed to be re-torqued. Guess they didn't tighten them up properly 3 weeks ago when they worked on it. Anyway, there was no fluid on the garage floor this morning so it appears fixed. Thanks for all the suggestions.
