To make it short and sweet, there's a vacuum line that runs from the back right corner of the bay, to straight down behind the distributor. The line is 5/32 and is not the one that hooks up to the engine near the pcv valve.

I can't find it from underneath and can't feel the end from up above.
Any help?

Steve

 

to the transfer case 4wd switch?

 

I thought that was somewhere under the battery tray?

 

Yes and no. There is a vacuum switch on the transfer case. It directs the vacuum to the front axle actuator that is under the battery tray.

The switch is on top of the transfer case and slightly towards the drivers side, where it should be barely accessible.

 

Ah. I see. Thanks fellas.