Well my car has bout 170k on it and the motor is rebuilt and i thought maybe i would beef up the trans and installed a B & M Shift Kit. It worked great for a day and now it doesnt shift into 3rd gear. 1is and 2nd shift great. Reverse is good. It acts like the car goes in Neutral i checked the fluids and replaced the gaskets to try again and it still doesnt shift. Any ideas? Do i need a new throttle body?