looking for transfer case info, borg-warner 13-56

i have this f-150that doesn't move under its own power taking up space in my garage. it belongs to my roomate's boyfriend who is too broke to get it fixed and doesn't know enough to fix it himself. i've been helping him out to a certain extent. we've got the problem down to the transfer case, which looks pretty tore up inside, but we don't know for sure what needs to be done to fix it. any suggestions on where i can find a good diagram, or even an explanation of how to rebuild a borg-warner 13-56?

be easier and faster to get a used one.Through it in,back on the road[img]/phpBB/images/smiles/icon_tup.gif[/img]
[addsig]

HI! I'M HNAT WITH SOUTHERN GEAR COMPANY. E-MAIL ME AT jhnatsgc@aol.com I CAN E-MAIL YOU A SCHEMATIC OF THE TRANSFER CASE YOU ARE LOOKING FOR AND I CAN POSSIBLY DIRECT YOU IN DIFFERENT AREAS TO CHECK CERTAIN THINGS THAT MIGHT BE GIVING YOU PROBLEMS
LOOKING FORWARD TO HEARING FROM YOU.