What is the towing capacity of a 2007 Toyota Tundra with the specifications listed below

So I have an odd situation. I have a 2007 Toyota tundra SR5 4x4 CrewMax, I just recently purchased. I have been looking at some of the truck's components and it seems this truck has the 5 speed automatic transmission(W/ OD), coupled with the 5.7l motor.

 

None of that matters. Read what is written on the stamped metal tag riveted to the edge of the drivers door jamb. What does it say?

Unless the axels & springs have been replaced, which is highly unlikely, this is what dictates your towing capacity for the truck. The power train on most tundras is adequate to pull loads in excess of the rated capacity. This does not mean it's good (or safe) to do so.

 

I think that tag will have a transmission code on it as well that will tell you what transmission the vehicle was built with. Has the axle code, color code, etc. Ring up a dealer, they should be able to help you if you give them the VIN too.