Dana Model 20 Transfer Case Rebuild Kit Fits: Various Jeep CJ Series and Cherokees with Dana 18 Transfer cases from 1946-1976 Part# BK20 This transfer case has an iron case, is gear driven and has 33.25mm I.D. front output bearing cones This kit comes with the main bearings, seals, gaskets, small parts kit. All the parts that are included are displayed in the picture.