Ford Repair: 1993 ranger 4x4, 4wd system, 4wd vehicle

Question
Just changed the rotor, bearings, and calipers on my truck (left front tire). Reassembled, truck runs just fine, EXCEPT, when put into 4wd. Steering wheel vibrates. Is there some trick to reassembly of a 4wd vehicle. Lining certain things up with the 4wd system?

Answer
just knowing what your doing or being smart enough to get a book if you don't-other than that there is not a trick-i am not being smart i am just saying get a book i can't see what you done and it will have to be torn back down probably to see what is wrong-get a book or take it to someone before you tear up a hub or something else.