chrysler town & country Transmission problem?

[KING]

Hello, My van shows the codes P0746, P1776 and P0740 with the description of TCC circuit malfunction. And the problem is that while I am driving and I press the gas to go faster or what is described as passing gear, the transmission stays in the passing gear so the RPM's are higher than normal so I have to put my shifter in neutral, turn the engine off for about 3 seconds and the restart it and all of this while the van still running which I have to do it very care full and then my transmission goes back to normal but then it does it over and over. Can any one with experience on chrysler transmissions help me? my engine is 3.3L and I believe my transmission is a 604??????? Please help me. Thank You