My dad has a 200-4R tranny out of a caprice that he had rebuilt with good parts. Installed his original 85 GN governor in this tranny. Tranny shifts great and works well, and shifts perfectly at full throttle (shift points). The problem is at part throttle, it shifts into 2nd gear way too quick. Anything that can be done to help this any? We've tried adjusting the TV cable, but it doesn't help much. TIA