I have been towing an empty trailer 10x5 and all of sudden noticed this horrible knocking noise when under load. More noticeable on Power Mode, and now maybe because I know it's making a noise I can hear it (not as severe as when towing) without anything in the back.
Have attached a video for reference, quite disappointed as Toyota is known for being bulletproof but it seems otherwise.
Volume may not be loud enough, my apologies.
If any idea, any input would be much appreciated.