Yea they tried tell me that multiple more parts would be needed to complete the rear locker install, but how many parts could actually be needed for it? lol.
I drove my 2wd Sport Edition through some deep mud! Although at one point I managed to get myself stuck and when I went to press the TRAC OFF button, nothing would happen. Which sucked cuz the engine would cut all power to the wheels once it detected slippage. So I just stuck some 2x4's under...
A rear locker install is possible. I was in the market for a rear locker for my 2002 4runner 2wd and a local offroad shop told me that they could install a rear ARB air locker for $3200. That price included parts and labor. Didn't pull the trigger, though. Figured it wouldn't be worth it...