Engine, transmission issue? Does not have much power and sounds loud. on 2007 Jeep Commander

When I step on the gas it makes a loud humming sound and when I take my foot of the gas it makes no sound at all. It seems to struggle at higher speeds? Any suggestions.

Asked by for the 2007 Jeep Commander
scan codes and post so we can adv or seek daig from your mech
Will do, thanx
1 more answer , 1 more comment
Sounds like an exhaust flow issue. Check the flexpipe for leaks (between engine and catalytic converter) Possible that the cat. is failing and plugging causing backpressure to choke the engine under a load and may have ruptured the flexpipe (the weakest exhaust link).
Thanx will check that out and let you know! Appreciated