So a PO added lockouts and the transgfer case kit to my 79 F250 supercab 4x4. Is a 203 case, automatic, married. So I should have from front to back, 4lo, 2lo,N, 2hi,4hi. Tried it out on a few hills tonight, 2lo fine, N fine, 2hi fine, 4hi will climb a tree, but 4lo seems to be 2lo, front axle not working in lo range only, will spin rear tires in gravel up a hill. what gives?