Have Transmission Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.Your 1973 Transmission dose not have any electronic controls and if the new transmission will not engage and your sure its is full of fluid then the problem is internal and usually means you got a bad rebuild. You need to return it back to the builder and have them perform a pressure test on it and recheck there rebuild.