i have just recently rebuilt the transmission in it and i put it back and it doesnt want to go to R,N,D,3,2,1 it just stays in park. we had to replace the neutral safety switch in it as well. If you have any clues to what it might be all the help will be very appreciated. Plus its a gift to my father and itll mean a lot to him if i can get his old truck running good as new.

Thank you.