I know this is an old post but it was super helpful with my install today. Got it done in 20 min. Thanks a lot.
Just a few notes tho for anyone in the future that does this install on your own...
STEP 6: when twisting the retainer to remove the stock shifter, it'd be in your fingers' best interest to use a rag instead of trying to twist it with your just your hand. Speaking from experience, you will break skin.
STEP 7: USE THE RUBBER HAMMER. I, like a donkey, just pried it off with my hand and it did come off but lost more skin on my knuckle when I actually was able to break the gasket's seal.
Overall the shifter works like how you would expect a sports truck to shift. I can't image why Toyota didn't just make the truck with it already in. Oh well, best mod so far, by far.