I have an 87 fullsize Blazer, when we got it the truck had auto locking hub on right side and warn lockin hub on left. I replaced the warn with the auto locking hub after the warn trashed out. The question I have is, I did not notice the front drive shaft turning previously when the truck was in 2 wheel drive, it is not in 4 wheel, but the shaft is turning. is that right or not? Let me know. Thanks Ray J.