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I own a 2006 6.0 F350. Bought a new camper couple weeks ago, drove it home 1.5 hours and was fine. Went camping last weekend and it drove for an hour fine but then the entire truck started shaking, not in the steering wheel. It would go away and come back while driving. Checked over front end and all seems fine. Tires weights good. Truck drives perfect unloaded. Only difference I did was lowered the hitch to level the camper more. added air in my rear airbags, changed my tuning from street to tow, didnt run the antisway kit. Camper still isnt perfectly level, needs a little more tongue weight. What should I look for? All engine vitals seemed fine.
Is the vibration road speed or engine speed related?
When it starts if you shift to a lower gear does it change? Put it in neutral while rolling does it go away?
It would be good to get some kind of reader to monitor sensors. Look for any codes.
Our 6.0 would shake intermittently when it shifted into high gear on the highway. Thought we had a transmission issue.
But in scanning for codes, it showed a misfire on 1 cylinder. Turned out to be an injector going bad instead.
Lower rpm and a load on the engine brought the shake on.
X2. And if all looks good and you're at you its end, theres some cases where you may even have to shim the carrier bearing down almost 3/8". Ford had put out a bulletin years ago and offers a kit to do it.