Has anyone here had or heard of a problem with the machining of the rear differential housing eating up bearings and the track loc?

Specifically, the pinion bearing seat? I had one other person who said that their work truck, a 22 550 as well, had a rear pinion issue and found the case was machined improperly for the bearing seat and had to get a new axle housing to fix the problem.

Mine has had a vibration since new and now has 48k on it. I have had it to the local dealer (I live in a small town) who is absolutely unhelpful, telling me that I needed to buy a pallet of concrete before he would even look at that problem.

I have replaced and balanced the tires/had the wheels checked for round at a medium and heavy duty truck tire shop. I still had the problem. I finally took it to a neighboring city to a heavy duty truck drivetrain specialist who found the driveline was slightly unbalanced and the carrier bearing was completely gone. I drove it and found the vibration was slightly better but still there. They drained the diff and found the oil looked like mercury and took apart the diff. Bearings and track loc were toast. I have a Ford warranty but wonder how this will work. The truck is still in the shop with an estimated total of $4k in repairs.

If there was a housing issue, I want to inform them before it is reassembled and eventually have the same issue again.

Anyone have any input?

Thanks,
Shane

 

Following, with some skin in the game, not having any 2022 F-550s, but having similar 2019, 2021, & 2023 F-550s, without any of the drivers reporting such issues (not that the drivers would notice or care though).

You mentioned having a "Ford warranty." Is this an "extended" warranty through what is now called Ford Protect?

I'm guessing that the Ford dealer was wanting some weight on your chassis, not specifically a pallet of concrete, but at least 2,800 more pounds of weight (assuming your steel skirted flat bed is 1,200 lbs) in order to evaluate the pinion angle at optimal designed operational ride height.

After Dana and Eaton parted ways, Dana repurposed their old trademarked name Trac-Lok (formerly describing a friction disc based limited slip in the 1970's and '80's) into describing Dana's me-too copycat version of Eaton's Detroit TrueTrac helical gear based limited slip, which Dana/Spicer introduced in 2020 as Trac-Lok.

Dana's re-use of the name Trac-Lok to describe two entirely different limited slip systems is confusing, so I just wanted to check in with you to confirm that the Trac-Lok components that the independent shop claims are trashed in your strewn apart rear differential are indeed a helical gear based system, and not a friction disc set up.