I buried by JKU in the mud and now I have a loud squeaking sound that correlates with RPM. I am pretty sure it comes from the wheels in the belt system. Is it possible that mud/dirt got in there and is making the sound? Will some grease help or do I need to detail the engine? The sound is bad and I hate hearing it over my exhaust system! Just want to get a few ideas on what it might be and what I can do to fix it.