You've seen this particular Toyota 4Runner before because it was the subject of the first Suspension Deep Dive I wrote for Autoblog. It's still hanging around my driveway and available to make the occasional repeat appearance because, well, it's mine. I chose the TRD Off-Road for a couple of reasons, some of which will come into play on my Flex Index ramp.
First, it's the only model other than the TRD Pro that comes with a push-button locking rear differential, electronic crawl control and multi-terrain select. Second, it can cost as much as $10,000 less than a TRD Pro, particularly if you're content with cloth seating and no sunroof, as I am. I used some of the money I saved to buy the third item: an option called KDSS, the Kinetic Dynamic Suspension System. Importantly, this clever option can only be fitted to a TRD Off-Road; it's not even available on the TRD Pro.