Alright, procedure for auto lock hubs:

Stop, put clutch in, put lever to 4 hi or 4 lo. Go forward. There should be a little click or maybe a clunk when 4wd engages after like 3 feet.

Auto hubs will disengage whenever you switch directions, then re-engage after a couple feet. So if you need to back up a hill or somethin, you will feel the rear tires spin for a second then the fronts will kick in.

To go back to 2wd, stop put clutch in, put lever to 2wd, go forward, stop, reverse for a couple feet til you hear that click, and you are in 2wd. If you don't reverse it, you are still in 2wd, but your hubs are locked in.

Note: after engaging 4wd, you can switch between 2hi and 4hi without stopping. (NOT 4LO) The poor man's shift on the fly. AFAIK, this does not hurt anything, but still I wouldn't suggest trying it while flooring it and spinning your tires.

Mike