Hello together I have a colt bj.88 182tkm automatic transmission, my problem is that he suddenly no longer switches up in the 4speed, when driving normally he switches gans normally from the 1st to the 3rd gear if it wants to switch to the 4th gear so at 50kmh, the speed meter goes up as if man trettets in the empty run into the gas pedal. the over-drive (od) button is not actuated, but as soon as I act over-drive button, I can easily drive up to 120Kmh however, then the turnza Hl to the speaking high because he then only switches up to the 3rd gear. what can this be ?? have been told by a friend that it is perhaps the ESG (electron switch gear controller) defective, can this be the case ?? there is such a possibility ?? if yes what costs me the ganse fun ?? am grateful for any help…. mfg carteeel