G.Agustin 
2008 Toyota Tundra CrewMax Cab SR5 4dr CrewMax SB (5.7L 8cyl 6A)
You deserve what you expect!
 I traded in a 1st generation Tundra for a 2nd gen. Tundra.   I have hauled my family + car up and down the Rocky and Cascade Mountains with both trucks.  As much as I liked the 4.7L,  it knew the weight was there.  But as I expected, the 5.7L didn't flinch or break a sweat going up the steep grades. Some owners find the engine braking annoying. However, I find that when you are hauling and going down a steep grade it allows for the driver to have control of the vehicle + whatever you're hauling.  Overall,  this truck has exceeded my expectations.