ok guys i had my transver case rebuilt and i took it out and when i am in 4 high or 4 low i will here a bad like binding poping noice and my back tires will lock up and skid any idea

 

Yea sounds like whoever rebuilt it flucked it up

 

X2 Make them fix it Correctly this time

 

sounds like your planitary is in a bind ...... some thing could have come loose and bound its self up in the gears .... reduction should only be affected in Low 4 wheel....

I would pu it up all 4 corners on jack stands and shift into 4 wheel see if they will turn without load ...