Hopefully I can get some help with this. It is a 90 convert. Gt automatic with only 60 thousand miles. I just installed a e303 cam, new throttle body spacer and throttle body converted to electric fans and did the basics like timing set and water pump. now the car is up shifting too early. Also doesn't seem to down shift until the car has completely stopped. I checked the fluid looks great and TV cable has no slack. It feels like a manual transmission when the rpm is low and foot off the gas the vehicle starts to buck. any suggestions out there.