Hello i’m working on a 94 300 4×4 Demand4Drive, the machine developed a problem where it won’t go into reverse. When you try to go into reverse you get a soft gear grind like it’s skipping on the gears but just won’t quite engage, if i have the machine idelling and pull it into reverse than give linkage a little extra push with my thumb it go’s into gear, i then made "adjustments" and can get either forward or reverse but not both on a set adjustment. Any ideas?

Thanks