2003 KJ - fail of 4wd for a short time.

[JustSumDad]

So today I was driveing on wet pavement on the hwy and thus in 2wd, I turned off onto a packed down snow road and on the fly but at slow ish speed I selected PT4wd and proceeded.
As I started up an incline on the road, it started to spin, rear only... confused I slowed, had to anyhow... clicked back and forth from 2wd to 4wd and it was clearly stuck in 2wd only...
I also tried FT4wd and no luck, brakes on full stop, nothing only 2wd. I gave up, put it in park, tried 4 low and then had front dig.. Stopped, went back to 4hi (sorry FT4wd) and finally had it working...
The lights on the dash were showing what I expected, everything felt like it was getting selected correctly, I did not feel play in between the clicks...
I always thought the libby had a live axel... Was I exprienceing an auto hub locking issue?

Any ideas?

 

[JustSumDad]

After exploreing a bit, it seems the Libby does NOT have any form of hub disconnect...

So hopefully someone can tell me why I was not abel to get front dig until I went all the way to 4 low...

 

[KJowner]

Mine sometimes needs a nudge of reverse to get it to drop into 4x4, probably a bit sticky from lack of use.