Archived 1994 4wheel drive not working

[dlange]

My friend four wheel drive wont work. Its a 1994 auto. Anyone have suggestions, were stuck

 

[mstimac]

Check your vacuum connections at the axle and transfer case for a start.

 

[dlange]

what if they are fine. Thanks for the help.

 

[dlange]

truck has vac on supply and 2 hi line, but not in 4 wheel line

 

[mstimac]

If you have a vacuum guage you can check the actual vacuum. Not exactly sure of the routing for the whole system though but start at the pump and work your way down. I just did a search and came up with 111 pages to sort through. Seems like most everyones problem came from either the vacuum lines being disconnected or a leak in the system.

 

[dlange]

ok thanks

 

[Joe G.]

The other thing that may be wrong is the shift lever may be out of adjustment. There is a lock screw on the shift lever/shift rod connection on the T-case. It may have slipped. If someone has been working on the transmission they may have not put it back correctly.