4 wheel drive ?

[bs&t]

I have changed the the front axle actuator 4 times in my truck they just stop workin could it be the trucks vaccum or is it the actuator

 

[CSnyder]

Its probably the vacuum switch on the tcase.

 

[TxDiesel007]

Posilock it and forget it

Vaccum lines were a problem on my old 12V, i spent the 200 bucks on the posilock it, never had an issue with my 4x4 on it..

plus the 2 low function is pretty darn cool for backin trailers.

win win situation if you go that route