Ok so i have a 203 in my 78 burb. Apperently its never been messed with and is in good shape. The truck came too me with half tons and"drive flanges" on the front like a full time truck would have. Well i converted it to 3/4 ton and warn hubs. Ive been driving it around with the hubs unlocked. Im thinking this means ive been driving around in 4 hi this whole time. When i put the thing in what i think is 4hi (not lock) and put it in gear, the front shaft will sit there and turn while the rear sits still(hubs unlocked) is that normal for 4 hi(not lock). Secondly ive heard that if you drive in 4hi (lock) and hubs unlocked it will "burn up the t-case" Is this true? Thrirdly schould i drive it in 4hi(lock) and hubs unlocked or hubs locked and in 4 hi (not locked). BTW i have 36" tires if that makes a difference.