having trouble with my switch.

[strokindually]

for about a month now i have been having trouble with the switch. when i change positions im having to wiggle the switch for it to engage. and the worst position is 5. worst part about that is that is my 140 pos. if i dont wiggle it, it seems to jump between positions. also sometime when changing positions it will shut my truck off. its not an emergency but is extremely annoying. any one else have this issue. thanks