thanks for the info. Mostly what I see for sale up here is SR5's. I like lockers. Was able to retrofit one into my 3rd gen, I would assume you can retro fit them into a 5th gen...
Yes you could retrofit, but at the cost/effort, I'd just look a bit more for a TRD or Trail edition. Then you would also get the crawl control mode and a manual shift transfer case.
Unless you're planning to re-gear and go air lockers or something similar, then build out the SR5. Really just depends on end goal wants/needs. For me, I knew I didn't NEED a locker but wanted one. I also knew if I bought a SR5 I would likely never install a locker, so that was selling feature #1 for a TRD. Secondly, I drove 4Runners with and without KDSS. Personally the KDSS is what finally convinced me to purchase a 4Runner; I was very hesitant on buying one without KDSS.