TM 10-3930-669-34 d. Assembly. NOTE Prior   to   assembling   components   in the   differential   case,   determine   roll pin   depth   so   half   of   roll   pin   is   in differential   case   and   half   is   in   pin. Mark   depth   on   the   pin   punch   with tape. (1) Mark   pin   punch   at   desired   depth   of   roll pins (47) in differential case (41). NOTE Ensure   that   roll   pin   holes   in   pins align   with   those   of   the   differential case during installation. (2) Install two pins (46) and pin (45) partially in differential case (41) until flush with inside of differential case (41). 10-19