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With Tundra 5.7 V8 the towing capacity is 10100 with 4x2 but only 7800 with 4x4. Much bigger diference than 4.6 which is rated 8200 for 4x2 and 7700 for 4x4...so the smaller v8 can pull 1000 lbs more than larger one?

Why such big diference with 5.7?
 

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The towing capacity for the DC is 9800 and the crewmax is 9000 for 4x4.
 

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You missed the disclaimer in fine print
"Calculated with new SAE J2807 method."

Even though it's not supposed to go into effect until 2013, Toyota opted to start it in 2011 models. Tundra tow ratings took a hit this year.

It will be interesting to see the numbers after all the auto mfg are on board.


OP: you have to compare DC to DC. The 4.6 4x4 is rated at 6400lbs. Also, the vehicle weight is also used to determine the tow rating. 4x4 is a few hundred poounds heavier.
 

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I was going to suggest that maybe you failed to get the tow package, but I went through the builder myself and even with the tow package on the 5.7 double cab it is showing 7800 lbs. Thats really odd. There is a chance I could get near 7800 lbs with my 2010...
 

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My 1011 Tundra owners manual lists the following tow ratings for the double cab:

With 4.6L and towing package (standard bed):
4x2: 8200
4x4: 7900

With 4.6L and WITHOUT towing package (standard bed):
4x2: 6700
4x4: 6400

With 5.7L and towing package (standard bed):
4x2: 10100
4x4: 9700

With 5.7L and WITHOUT towing package (standard bed):
4x2: 8100
4x4: 7800
 

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The transmission cooler and gearing make a big difference.

It looks like the numbers on Toyotas site are messed up. They are listing the towing capacity for the 4x2 models with towing package and the 4x4 models without the towing package.

I pulled out my window sticker to check the tow ratings they listed on my truck.
2010 DC 4.6 4x4
max tow without towing package: 6900lbs
max tow with towing package: 8300lbs

So with the new standards, the 2011 version of my truck dropped 400-500lbs.
Not too bad! Good to know they weren't pulling numbers out of their a$$.
 
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