Tranny slips in 2nd gear while cold then runs fine. What’s wrong?

Hello, it could be that there is something inside the transmission that is temperature sensitive - something in the valve body, a seal or some kind of other part sensitive to heat. When cold, it could be causing a hydraulic pressure issue, and when warm, it could be just fine. This is a total guess, but an educated one. Without tearing the transmission apart and inspecting it, however, it'll be impossible to know -- and that could also be cost prohibitive as it is. www.repairpal.com/repair-shops That's a link to use to find a shop near you who can help!