If a transmission can handle more torque will a lower torque engine cause higher service life?

I'm getting a 2004 Mercury Grand Marquie with a Ford Modular 4.6L 2 valve V8. The transmission is Ford AOD 4R70W which is rated for 506ft pounds of torque. The V8 in my car has 275 ft lbs of torque. Because this transmission was designed to offer high torque engines, will a lower torque car have a longer service life?