I have a 52 chev truck that has a 235, floor shift and open drive axle. I believe the engine is a 56 year. the tranny has the linkage to adapt to floor, and it jams in between gears sometimes and I have to crawl under and free up. Is it a linkage problem or transmission problem anybody know? It's a 3 speed and 1st and reverse are reversed on the H-shift pattern.