In the extremely remote possibility that a PO installed Toyota Automatic Hubs (I guess it could happen), you would be removing them because they were "historically" broken a few minutes after they were installed, but you would then also need some additional parts to go along with the manual hubs.
Downey: My 78 FJ40 that I just bought has the auto Warn hubs on it. I have read a good bit about them and plan to replace them as soon as I can get the money to buy a set of Warn manual hubs. You mention that if the auto hubs were on and that if you were going to replace them with manual hubs, that you would need additional parts. Which parts are you referring to? So, if I get a set of manual hubs, then it is not a matter of just removing the auto hubs and replacing them with the manual hubs, I have to have additional parts also. Is this correct and what are the parts needed. Thank you very much