OBS 4X4 systems question

First there are no hubs to lock, there is a axle disconnect and a tcase to engage. Generally you need to move a bit because the cogs may not be lined up correctly. Also GM when from a thermo frant axle disconnecter to a servo driven one in 98 which is a lot more consistant in perfomance

----------------- TheSnoMan.com

Thanks for the answer. So if your stuck in 2wd can you rock it a little and get 4wd engaged?

Thanks again

Yes, that will work. Sometimes it takes very little to do it. When it works correctly, when moving when you select 4x4, a syncro in Tcase picks up drive shaft and brings it up to speed and then let Tcase engage and then axle engages (dosconnector) since axle shft on wheel with now match diff speed with tcase engaged. If the disconnect where to try to engage first there would be a lot of crunching and grinding at times.

----------------- TheSnoMan.com

Thanks for explanation.