Hey Darrel, I have an MY22 also and have not noticed any odd vibrations. Mine is a 3.5 Ecoboost 4 X 4. I did not see what engine yours has. Can you elaborate? Also, what wheels and type and brand tires are installed on your truck?
I have a 22" 502A PB. I have an odd vibration under load with or without the ICE running. I have spent a fair amount of time up front looking at things. There is so so so much slop in the front drivetrain. jack up the front end and check the wheel slop. Its horrible!. I haven't had any luck on finding the source of the vibration. I've thermal imaged all the front bearings and such with no luck. Mine is a oscillating warbling noise not unlike the cabin noise of a bomber in a WWII movie. Driving uphill really gets it singing. You can also just hear it rolling down the road with the engine off sometimes. I definitely think its sounds like a bearing.
Can you jack up the rear and run it in drive safely? I had a very similar sound in my '95 F-150. Once I raised the rear and ran it in drive the hum was located tot he rear end. Turned out to be the rear pinion bearing (at the head not the yoke end so it wasn't until I pulled the rear entirely apart the culprit was found)...it had a bit of metal transfer from the inner race to the bearing...but nothing on the outer race.
Hey Darrell, is it only between certain speeds? Is it only at throttle tip in? Or is it more pronounced under load? Does it sound like its coming from the back?
I, like many, have vibration issues. At least with my truck (2.7 ccsb fx4 3k miles), I have an oscillation around 50-60mph like clockwork when at tip in or accelerating lightly. My theory is this is originating with the rear pinion. The springs are tiny in this truck and I theorize this leads to more axle wrap than other trucks. My pinion offset is 2.5 ish degrees down compared to the trans. If I'm really on it or have a load, the vibration either disappears or seems to hard to notice possibly because I'm asking the motor to make more noise. More likely, the pinion is now "wrapped" into alignment with the transmission when under significant load. I *think* Ford gives us these trucks with pinion angles that compensate. Coupled with the inexcusably ridiculous rake, Ford must be thinking we use the shit out of these trucks.
Mine is similar but not necessarily exact...definitely more pronounced under load than cruise or decel. 45-50 mph is where it seems the worst.
Your pinion down a couple degrees is correct...it allows for the pinion to "climb" the ring under acceleration and not run into U-joint phase issues. When I set up a new axle assembly in the rear I set the pinion 2 deg low for this reason. You can be around 3 or 4 deg out before you feel the phase issue.
I have the Max tow package so I have an extra leaf in my rear pack so axle wrap isn't an issue...at least not the same as a non max tow rig.
