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Ram-Jim, my 2019 5.7L fans roar also occasionally but seems linked to Max A/C mode with full cabin recirc air knob settings.
Remove top plastic cover above radiator-coils under hood. 12 pop up snap plugs hold it down. I stuck my hand down between coils and air grille dampers it's tight but...
Check the active air grille shutters in front of radiator. You can look thru front air grill and maybe see if they are fully open. I just removed my 2019 Rams 5.7 large plastic top cover [12 retainer plugs] engine compartment. This allows you to see the center mounted air grille shutter assy...
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