I've never seen this before. Can anyone tell me some more info on how this work and what the differences are? I went riding today and got stuck in 4 low & 4 low lock, but was able to get out in 4 High. Perhaps a website with more info? In 4 low and 4 low lock the front didn't appear to be spinning. I was only able to get ALL 4 wheels spinning in 4 High. The guy I bought it from put manual hubs on the front. Could that be the problem?