2006 Eddie Bauer V6 Acceleration problem

[Jamal]

i have Ford Explorer 2006 Eddie Bauer V6 Edition. I am facing a problem of acceleration. While moving the vehicle from STOP position, I have to accelerate it very very slow from 0-25 miles. If I press accelerator to the floor, the vehicle RPM shoot to 4000 and unable to increase the speed above 15 miles/hr. Then I have to stop the vehicle to ZERO, then accelerate it very very slow to 25 mile/hr. After 25 mile/hr, vehicle behave normal with normal acceleration.
At high speed, i.e. 75 mile/hr, I am facing an acceleration lag. When i press the padal, the RPM increase to 3500~4000 for 5-6 second. The vehicle speeds after 5-6 second and RPM return to normal.
Sometimes after passing the bump in high speed change the situation and vehicle can be accelerated normally from 0-25 mile/hr.
I doubt there is some problem with Torque converter Clutch Solenoid and wiring of transmission.
Please suggest the solution.

 

[Explorer75]

The first thing that comes to mind is the TPS (Throttle Position Sensor).