Thanks...but mine still dos not work unless I swap the vac lines.

My guess is that when I swap lines it leaves the add system engaged (kind of like leaving the hubs locked in a non add truck). Technicaly 2wd till I shift to 4wd but the axles and diff are spinning.

To troubleshoot the system I need to know what ports should have vac applied in 2wd and in 4wd.

89 ext cab 22re 4x4 267K miles (for sale)
94 Land Cruiser Factory lockers
95 T100 4x4 ext cab