When the engine is cold, i dont have reverse until warming for 15 minutes

Question

Only code is p0740 which happens at highway speeds. Could these be connected?

Answer 1

Slim chance that it is connected, if you have to wait for reverse check the transmission fluid  level, ( P0740 is for the TCC (torque convertor clutch circuit), which is for highway speed, the solenoid or the torque convertor , either one is faulty