The only time I had that happen was when I drove through about 20" of water...had no choice but the rear end did suck water into it and was a mess. I cleaned it with kerosene but that stuff isn't as easy to find today as it was 40 years ago and it is $$$. Good luck!


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end