Finally got a chance and did below steps:

1. Jack up both rear wheels and put it in park and rotate one wheel. Report what the other wheel does.

Result: A bit of play different direction rotation (1/20 of a circle or so)

2. repeat above in neutral and report results.

Result: Both wheels rotate same direction.

3. Jack up all 4 wheels and put it in neutral and tcase in 2wd and rotate a rear wheel, and report if one front wheel turns

Result: Only rear wheels rotate, same direction.

4. shift to 4hi and repeat 3 and report back.

Result: All wheels rotate, same direction.
I even tried it with rotating one of the front ones but has less effect on rear wheels, compared to the effect of rotating rear wheels on the front.

E Brake was off during all above tests. <img src="/forums/images/graemlins/smile.gif" alt="" />