Hey guys, this is my first post. I just bought a 1989 corolla 4dr auto. I am having a problem with the car shifting into overdrive. When the temperature on the temperature gauge is below the cold line, the car will not shift into overdrive until the gauge gets just barely above that line. When I drive on the freeway the car hardly ever gets past this line, especially in the cold mornings. City driving however the car stays at what seems to be normal operating temperature. Anybody knows whats up? Thanks for you help!