2006 Nissan Frontier, won't accelerate at higher speeds

What is your question?

2006 Nissan Frontier will go thru the gears fine from a stop to 60 or so mph. But at around 60 mph, has no pop if you press the accelerator to pass or speed up. It won't down shift automatically to get going.

How long has your 2007 Nissan Frontier had this problem?

a few weeks