Started as some small drips but has gotten noticeably worse. I need to replace it and I'm just wondering what I'll be getting myself into since I'm far from an automotive expert. Truck is a 1979 f150 with auto trans.

Any help or advice is greatly appreciated.

 

easy peasy,remove yoke ,remove star washer,remove seal,,,,,replace in opposite order 130-150 lb tork on new nut for yoke.....North West Fab has a complete seal kit very reasonable,,,,hope that helps

 

Or maybe this will help?

New Process NP205 Transfer Case Parts

Sweet action right here! NP205 Rebuild Guide

NP205 New Process Transfer Case Diagrams and Information