With that era of Rodeo, as long as you've unlocked the hubs by backing up in 2wd for several feet, you're unlocked. It's not like the later drive flanges they put in play.

If you do choose to switch to manuals, Aisins are often the hub of choice. Warn and Superwinch also offer manuals that will fit your truck. Aisins can be had from indepenent4x.com or several other avenues. Salvage yards may have them as well.

James