Just went through the same problem with my '99. First, know that the cross member must come off inorder to genuinely get the pan off. So a gasket leak is possible if that was done (my mechanic claimed he did the pan removal, but on further inspection I could see that it did not come off, so he redid it right. Then I had a pan gasket leak which he fixed on the second go round.) Now, with a full-up tranny and a new pan gasket it still had a leak...on the left hand side??? I looked and the PRNDL switch on the side was wet. Now we had a gasket on the side of the tranny to address. My mechanic ordered a new gasket/seal and installed this. But I still had a leak. So, a second attempt on that seal resolved that matter but... I still had leak? The last leak was just a lose filler plug on the pan (after all that torture). Whew! Moral of the story...yes alot of things can leak and you have to address them all. Almost makes you feel that cleaning out the ole tranny just ain't worth it...but it is. It sure runs a whole lot sweeter with that AMSOIL in it.