My car is having issues?

I'm currently driving a 2011 Ford Explorer Limited with a little over 115k miles. Within the past few weeks i have noticed that it has been shifting rough and even shifting after the redline which is at 6,500 RPM and making the switch instead at about 7,100 RPM (I have NOT been using the sport mode). The engine also has been sounding a lot louder (may have something to do with the exhaust) as well as it has been making whining noises at higher RPM which sounds just like a supercharger… The car has been well taken care of and just want an idea of what the problem may be.

Any possible explanation?

I have a 2001 Ford Explorer Sport Trac and the seat belt light stays on. I buckle myself up and the light stays on still. As I drive, it beeps fast meaning I need to buckle up even though I'm. Any possible idea to fix this? The wires and connections all look good and no corrosion.

2005 Ford Explorer Fuel Problems?

My 2005 Explorer starts and runs fine BUT…
Run it for an hour and shut it off it will start for a split second and shut off almost as if it had a bad key chip.
Kept trying it and every 5 min it will run just a little bit better. Until it runs fin.
I can drive it for 2 hours and everything is fine. Its only when I shut it off I have this problem
I have Replaced…
Fuel Pump
Mass Air Flow Sensor