Riding on sunday i got into the deepest thickest mud ive ever gotten into with the xmr. Ive never knoticed only having one tire spin in the front. Usually always slings posi, but when i was in the real thick stuff it would only spin one at a time. I also got into some very off camber situations causing one of the front tires to come off the ground, when ive gotton into those situations b4 ive been able to get out because both front tires would spin. But yesterday only the tire in the air would turn. I kno the front diff arnt 100% locked but its almost always spinn both tires. Also when the tire in the air would spin and the other not, i would hear a "rubbing" sound, no grinding, poping, clicking sounds were heard. Is that a normal sound from the front diff? Whats in the front diff, what really is a viscolok? In lighter mud the bike would sling all 4 tires no prob,