Bringing this over from the black hole of information known as Facebook so it's not lost. One of the members of Mitsubishi Monteros USA, Charlie North posted about locking out your vacuum actuated front differential. Here's what he said; "For everyone that has swapped to manual hubs up front and want to do a CAD delete. There is no need to swap in a Sport differential/axle setup. To much money and work to just make sure the front is engaged. What I have been doing for decades is to completely remove the vacuum components. The vacuum unit has a rollpin inside the rubber boot, At a hardware store look in their spring selection for one that will hold the shaft out and get a washer and cotter pin as well, had I planned to write this I would have the dimensions for you. What you are doing is installing a spring to hold the axle engagement shaft pulled out. Grease it up for rust prevention Install a rubber boot with an end cap, done." I'm going to try and bring more of this information as I can so it's not lost.