2002, 7.3 super duty
Another odd issue yesterday. When I was full throttle to "clean her out" and check things prior to dropping off at mechanic last night, there was this sound like something was rattling around inside a large tube somewhere in the mid/rear of the engine. At first I thought it sounded like my block heater cord/plug ratting in the front number with the wind. But with my loss of power issue and sluggish accelleration....I'm wondering if there is something internal

 

Like marbles in a can?

 

Didn't have loss of power..etc, but I once experienced a "dragging chain" sound and ended finding an empty crushed soda can in my spare, haha

 

No, more like a wiffle ball in a plastic 5 gallon paint bucket

 

What would marbles in a can represent?

 

Either a torque converter failing or a cracked flexplate