Can we make this ‘62 Cadillac shift again? “Jetaway” won’t work!

Transmission won’t shift in the 62 Cadillac. I try to diagnose it so I don’t have to take it out and rebuild it. And the model A gets routine maintenance that turns into an absolute nightmare and I might have to swap the engine if I can’t fix it Business inquiries and if you have an abandoned vehicle you think dad and me might be interested in email us here [email protected] Interested in pre 1980 abandoned cars or trucks/ barn finds. (Not interested in foreign cars) and 1st and 2nd gen Cummins (89-98) diesels only