Hey Dirty, Read this whole thread, quite an education - thanks! I've got a few questions about my dodge truck. For sealing differential covers would you recommend 598 RTV? These covers don't use gaskets. The repair manual calls for red Mopar silcone sealant or equivalent. Can I use 518 on my transmission pan and get rid of the gasket? It perpetually weeps every time I change it whether I use an oem or aftermarket gasket. Clearance shouldn't be an issue without the gasket. Lastly, is there anything I can use that will stop the corrosion on brake caliper bleed valves? I don't have a problem with them sealing, but I'm in the rust belt and tired of using cans of kroil and hoping I don't snap them off.