We have a 2012 4.6 Tundra 2wd DC also w/8200 tow capacity. We tow a 3700lb wet RPod. If my experience with the RPod is any indication, you're gonna be in heaven towing at the level you're describing. I can climb any pass in Washington State at pretty much any legal speed I desire. No, the little 4.6 probably couldn't comfortably tow any 8200 lbs where I tow, but I'm pretty sure it would do well with quite a bit more than what I tow. I do lock out 6th, as the transmission searches some when towing with 6th enabled. On tougher climbs I sometimes also lock out 5th, but can still keep up with most of the big boys.