I have a tundra that I pull a 5700-maybe 6500 pound travel trailer with and feel that it pulls it well.I would not even consider an additional 5k added to this weight.It will pull that amount I would say,but it would not be what I would consider a comfortable or safe weight to pull.I would not even pull the weight I do without a WDH.Are you saying you pulled this weight with a bumper pull hitch?If you have the tow pkg on your tundra you should have a frame mounted receiver hitch on it....either way I would probly say you were over your max towing weight...

yes, I went back and looked at my trailer weight and it is 2540lbs so with a 8000lb dozer that puts me at 10,540lbs and tow rating on my tundra is 10,500 so yes I'm over by 40lbs.

Edit: just looked up my komatsu d21 and operating weiggt is 7946lbs so I guess I'm under....Win!

It's usually the payload that gets you on a half ton.

max payload is 2040lbs, not sure how to compute that

I like the wag method personally.

Triple B, if you were that close to the max chances are you were over any way. Those numbers only leave you with 14 lbs under max... The max figures nothing in the truck but a 150 lb driver and a tank of fuel. If you have a tool box you were over, if you weigh 164+ lbs you were over, im sure you used more than 14 lbs of chain and boomers to strap the dozer to the trailer etc.

Did it pull it? You say so and I don't doubt it one bit, but I bet it was much closer to busting a nut than a walk in the park for it.

2040lbs is a pretty good payload for a half ton. Must be a 2wd regular cab. I've seen them as low as 1100. You are supposed to have a WDH for trailers more than 5,000lbs. So yeah, you are a little over Toyota's recommended weight. With a proper WDH, you could estimate 10-15% of the weight on the truck. So worst case scenario, you'd have 465lbs of payload to play with. Like RC said, they allow 150lbs for the driver and a full tank of gas.

May be worth a read:
http://www.hardworkingtrucks.com/2014-toyota-tundra-towing-capacity/

The 2014 Toyota 4x4 crew cabs have a max payload of 1525 and max tow capacity of 9800, and weigh 700lbs more than the 2wd reg cab. Not sure we're comparing apples to apples. Mine is a 4x4 Screw.

The tundra that I tow with is a 2014 regular cab, bare bones. Has the tow package and I added air bags to the rear. It's 10,40lbs tow capacity and 2040lbs payload.I also have a 2014 crew max that is my daily driver but I think the towing capacity is less for it.

I have wasted nearly thirty minutes of my life reading this entire thread. One thing I will say, whether you are right or wrong in making your point, many of you impress me with the general your knowledge of how an engine gets its power and how it is distributed throughout the drive train. It got me to thinking about this.................can you imagine the conversations and the dialogue between the "engineers, gearheads, and math geeks" in Detroit (Ford, GM, etc.) when a new engine is in its design stages..... I would love to be a fly on the wall.

Interesting read about the Ecoboost engineers and their backgrounds.

http://blog.cochran.com/wordpress/index.php/ford-ecoboost/

Cant stand a great thread die off!!!

Here are some cool towing comparison videos.
The towing time isn't really comparable because they admit that on some of the trucks they allowed them to speed past 60, changing the time...
2013 Dodge 5.7
https://www.youtube.com/watch?v=us6d5R1q23U

2015 chevy 6.2
https://www.youtube.com/watch?v=rgMzyKqsps0

2014 Ford Ecoboost( I thought you guys said they tow at 2000RPMs? Looked more like 4000-5500RPMs to me)
https://www.youtube.com/watch?v=QR-gMWRzvOg
enjoy

My next Ford will be a V-8. The Ecoboost is ok on the highway and drops way down when towing. All hype in my opinion.

My Ecoboost towed my 20'6" G to Missouri a couple weekends ago at a constant 2,000 RPM. Gas mileage sucked, but we were going up and down hills for a lot of the trip. GPM was around 11. But I didn't buy it for the mileage. It tows like a dream.

Better mileage dropping than losing speed or downshifting on every little ant hill. The 3.5L ecoboost is a better tow engine than the 6.2l, much less the 5.0l.