a few months ago the tranny started acting up after coming to a complete stop while running errands. As light turned green I noticed that it didn't shift until 4K rpms. I replaced tcc, fluid and filter and adjusted the tv cable which seemed to help. It has its days where she runs fine but today it wouldn't shift. On freeway it takes to long to get into 4th only after I throttle it will it shift. What do I need to look for? Was told by David to check the tcc valve as it may be sticking.