I took my truck mudding, and we hot stuck it mud. After getting out of the mud, I was unable to go forward while in drive. I now have only Reverse and Low 2. No Drive or low 1. If I get the truck going at about 20 mph in Low 2 then I can shift it to Drive , but if the rmps lower again I have to shift back to low 2. Any ideas? Tranny fluid looks good, no code lights either.