When I shift to reverse and press on the gas pedal my 2008 mazda tribute makes lije a thumping noise stalls and will not move

What is your question?

I hear a thumping sound and the truck buckles, I have to press hard on the brakes and sometimes it will move but other times it just doesnt move at all

What makes this problem better or worse?

I have to shift gears while pressing on brakes while the car is parked in my driveway

How long has your 2008 Mazda Tribute had this problem?

4 days