Help, i was attemptin gto chnage out he rear diff fluid when I accidentally dropped something in to the diff. I go the diff cover and got what I dropped buit now the gasket is toast. I can't find a dealer that is open today and I need the truck tommorrow. Woud it be okay to use something like a red RTV to seal the cover? I can't find anyone that has the gasket.

Found a dealer open that has it in stock. Thanks for the views.