Hino Motors is Toyota's industrial truck divison. They make the Aisin transmission that the high end Dodge Ram 3500 Cummins HO (6.7l inline six: 385hp, 865ft/lb torque) uses.
Toyota basically has a Cummins-level prime mover engine/drivetrain combo that could tow even the biggest and heaviest fifth wheel toy hauler: 32,000 GVWT. That's 16 tons towing capability. The wicked Cummins HO only supports 15 tons and anyone who needs that kind of towing capability is like a hero to me. That's just SICK towing capability.
They just need to put that Hino mill in a Tundra that has a chassis can handle a military-marine grade drivetrain. If they do, they'll sell every one they make.
(Side note: Most powerful engine I've seen on the road was a Volvo D13 inside a two million dollar Prevost luxury coach that had some 1600+ ft/lb of torque and was towing a 30-foot trailer behind his 40 foot RV. Jeeminy jumpin' jehosephat, and it even got 9 mpg with a range of more than 1000 miles. Just absurd power: 13 liters of howling turbo diesel.)
