Sounds like this has the teraflex gear upgrade in the transfercase. Between that and the front and rear lockers, there’s been some updates to this drivetrain.

“1953 Willy’s cj3b with all original stuff just been beefed up in places such as motor it was rebuilt and bored .30 over along with 3-1 gears in tcase and has 4.27 gears in axles along with lockers front and rear. Has new 2inch over stock leaf springs for total of about 8inch lift. Has 36×12.50×15 swampers and custom built bumpers and roll bar along with stainless fuel cell. Cash only. Text me”

http://lakeland.craigslist.org/pts/4617145249.html