89 four runner four wheel drive problem?

89 4runner 4 wheel drive shift to low gear but front wheels not locking in..to be honest im not sure if they were before i replaced rotors and pads or not it was a bear removing the hub parts hope i put them back right! Is their a way to fix this problem or what is a common problem with this?|||I had a 87 sr 22 engine bad bad A-truck all my friends had dodge 95 ford an chevy with 45's tire super swappers on when they got stuck who did they call US... What is wrong with your tuck is its not appreciably by others. You may have pushed the butten that says u start without the clucht it may need replacing. The lock feature when in neutralize has to be put in gear the lock tires seat in seat an press that butten self start giver hell