• The Toyota Tundra Dually is a concept truck that was introduced in 2007. It is a Tundra CrewMax pickup with a Hino 8.0-liter six-cylinder diesel engine and an Eaton five-speed manual transmission. Its engine, transmission and back end are heavy-duty, with some components sourced from the Hino commercial truck line. Its rear end is also developed with heavy-duty components. Its 6-foot bed is plated with stainless steel and houses a 24,000-pound fifth wheel tow hitch. Although unconfirmed, its towing capacity is believed to be that amount. The truck was developed by the Toyota Motorsports Technical Group. If produced, it would be the first diesel, 1-ton, heavy-duty dually pickup in the Toyota lineup.
  
  

Rear Axle

• The Tundra Dually uses a Meritor rear axle with a 13-inch set of ring and pinions. The axle is rated at 25,000 pounds with a GVW near 35,000 pounds. The Tundra Dually rear axle uses hypoid-Generoid gearing. It can be outfitted with a remote-actuated locking differential. According to Meritor, the hypoid-Generoid gear and pinion are "designed for each ratio to obtain optimum tooth engagement."
  
  In comparison, the production 2007 Toyota Tundra half-ton pickup uses a Hino axle.
  
  

Rear Suspension

• To accommodate the large towing capacity, a Deaver leaf spring pack is used in the Tundra's rear suspension, with Bilstein shock absorbers.
  
  

Rear Wheels

• The Tundra Dually has 22.5x9-inch, 10-lug Alcoa brushed-aluminum rims and Michelin XDA 2+ Energy 295/60R22.5 tires.
  
  

Production Status

• The Toyota Tundra Dually is not in production. Industry experts await Toyota's decision as to whether to go ahead and produce the truck.