Having trouble figuring out what is wrong as I've been posting slot about lately my 4wheel is not working...still. I ordered a new actuator. Mine was full of mud. But while I was doing this I checked the vacum on the conecting hoses and had vacum, when in two wheel, put it in 4 wheel and did not notice a difference in suction. Does this mean the vacum switch on my t-case Is not flicking over to switch the suction if anyone can enlighten me that'd be great thanks.

 

sounds right.