You better add a trans cooler 220 is high...
And better take it back yea it might be a noise that you don't need to be concerned with but you paid for a proper rebuilt and you shouldn't have to live with hearing that noise and dealing with it.. Of course guy doesn't exactly seemed thrilled to pull the trans out and apart again but that's what a warranty is for to bad sometimes you have to triple check and redo your work.
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