I have a 1951 B that while driving around the property will just stop moving. The shifter never moves like it popped out of gear it just coasts to a stop. Then it is difficult to get it in gear again. It just happened again last week and now I can only get it in 4th,5th and 6th gear. It won’t go down and over to 1st , 2nd or 3rd and reverse. And what’s odd is 4,5,6 feel like they are 1 , 2 and 3rd.