Help! i was towing my camper last night and suddenly the Banks PDA gave me an error that it had detected trans slip! it cut out its extra power but truck did not. the trans temp was 180 engine 195. not pulling a hill or anything, power level was on 5 more to go yet. speed was 60 very good conditions. read the slip% and it was 0-4..6 then steady at 1 or 0% . check fluid level and it was ok. any ideas??