Are you saying it takes off ok and drives ok at first but just keeps running in first and wont upshift ? If it is a few things come to mind but I am not sure if thats just what you are saying. If the kickdown band it shot it will drive along and stay in first and then when you get enough speed it will go into third as it will have no second without the kickdown band not working. But it wont slip like that it will just rev up and drive in first until you go fast enough for it to shift into third. It wont slip because if the band does not come on it just stays in first until it goes fast enough for third but as you pick up speed and get off the gas and back on it can freewheel some since the L/R band is not on in drive. You are saying it does not shift into second at all right ? Ron