Hello all. I have a new 2021 Expedition STX that has a knocking sound under the rear end only when towing my 2500 pound camper. It started as a clicking sound near the rear axle and has steadily gotten worse. The knocking is present with or without cruise, built in anti sway on or off, tow haul...
I have a knocking noise coming from my motor which seems to go away after start up and then come back after a few minutes. I have 3 videos of it: I have checked the spark plugs. I'm really hoping its not a bent rod or any of that nature. I heard it pretty good underneath by the transmission...
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