Hello I have a 2001 dodge grand caravan sport 3. 3L I am having problems with my transmission because when I drive it statys stuck in 2nd gear and will not chnge. I have had the solenoid pack replaced, the input and output speed sensors replaced and it is still doing the same thing. I tried the key turn to get the codes and I got P1684 and P0700. I don't know what to do now I am so frustrated and lost. Please anyone help. I was told that I need to have my TCM cleared of these codes then it will drive like it is suppose to I just don't know what to do.