hey guys I realized this is probably a easy problem to fix but give me some ideas. I have my tranny and transfer case out and they have 1/4 in of greasy build up on them. I want to power wash them but don't want to get water inside the case... the speedometer cable hole is open as well a a few others how do I plug those bigger holes to be water tight? I don't have the parts from the truck to plug them either... was going to use my silicone plugs for powder coating but they are too small. IDEAS??????