4 Wheel Drive/ Possible Diff Issues

OK, I have researched the "Ultimate Front Diff Thread" but have not come across my specific set of symptoms. After a difficult obstacle yesterday, (a little bouncing on a high traction surface), the front seemed to only engage sporatticly. Sometimes the front would just sit there while the rears were spinning and sometimes it would go ahead and lock up.

Does this possibly sound like a busted cage? No noises or anything. Havn’t had any garage time with it yet.

KR

2010 800S LE