I've recently inherited my dad's pickup truck. 1954 chevy with a hydramatic transmission. he had been restoring it and i've finally got it put back together and running. I've never seen an automatic this old and figured it was a 3 on the tree. dumb question, i can get it in gear forward, but cannot seem to find reverse. is there some trick to this? i may have some mechanical problems that i'm not aware of too. any guidance would be appreciated on this kind of truck.