Hi all new on this, I have a question, my mechanic removed my auto box on my 4.0 p38. It was to fix real crank seal that was leaking badly. He replaced the box back in situ. Long story shorter!!! It’s not selecting gears. The selector in the cab isn’t very tight, seems sloppy. It reversed after job and drove back in but next day it won’t select gears. Can anyone shed ideas or light on the problem.