This is what I’m getting at. I’m not saying Toyota isn’t going IRS on the Sequoia, but I don’t think they will use the TNGA-F chassis. Perhaps they’ll call it TNGA-G or something. I get what @desmocruiser is saying by making the platform modular so you have say various fronts and rears, and depending on the vehicle you’re making, you connect the appropriate piece, but that would still make it a different chassis. Kind of like when Ford went modular with their V6 and V8 motors. The V6 used all the same accessories the V8 used, and was essentially the V8 minus 2 cylinders in design, cylinder size and everything else. That didn’t mean it was the same motor though. A modular chassis platform to my understanding would mean that the TNGA-F used for the LC300 and new Tundra would be the same in say the front of the Sequoia, but the chassis would probably not be labeled TNGA-F, but as I said above, the last letter would likely be changed to suit the rear of the chassis change to work with IRS.
Maybe,
But what would be gained from Toyota adding a IRS to the Sequioa?