Ive got a 97 F350 with Powerstroke. It was a plow /salt truck before I got it last year. Anyways, a couple of days ago I noticed that it was leaving drips in the drive. Today I got under it and thought I had a leaky rear main until I cleaned the pan off. After getting all the grime off the bottom, I see that the oil is just seeping through the pan near the rear edge. I knew the pan was badly rusted but Ive never seen or heard of an oil pan rusting through before. After a cleaned it, it no longer leaves drips, its puddles now. My temporary solution is to smear some high temp RTV on it but I know thats not permanent. Any ideas on this, short of pulling the pan and replacing it? Welding, JBWeld, Sealer???