Yeehaw48, The dealer told me they thought it was coming from condensation, which I believe is correct. I seldom run through any water, I try to go around the mud holes, it cuts down on the clean up time. I thought I might have gotten water in around the black plug in the top, but afterwards I don’t believe I did. I was looking for some kind of vent to put in the top that would allow air to circulate, but would keep water out. I also looked for a check valve to replace the drain plug with, but clearance was an issue between the bell housing and the skid plate. I finally just drilled a small hole in the plug to let it drain. When I get a chance I’m going to take Aurthuritis’s advice a put a cotter pin in it to keep it from getting clogged up. Glad you got it going without a lot of expense and have located the problem.
Pete