Found my exhaust rattle and burning smell

[airspeed]

I installed the engine / transmission last week.  Ever since then I had this kind of rattle raspy sound with a strange burning smell.

This was on the transmission cross member under the exhaust pipe.

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[DirtyComanche]

Does it still work?

[HOrnbrod]

Looks like it got heat soaked.

[cruiser54]

That's funny.....