I guess I need to take my truck in but I just wanted to get some thoughts on what could be wrong. Not all the time but mostly when it's cold my truck seems to slip when it hits 35 - 40 mph. It does not do it all the time after she warms up. I checked the fluid and it looks good. Do you guys think its something simple or bad inside that is going require them to pull it out? It always does it at the same speed no other times. it stopped doing it for a week now it did it again this morning. Temp was about 28 last night. Thanks for any ideas