Axle Separated From Truck Picture

[Scott'n'Wendy]

You should never reuse any bolt that has been torqued.

You replace all your wheel studs at every tire rotation?
Most bolts you encounter on a vehicle are torqued to a certain value so you can re-torque over and over again and stay within it's design capabilities.

Some, like u-bolts are designed for one time use.

I agree with WBurner, something happened with the u-bolts. What caused them to break? Who knows. I've never seen anything like that before though. Crazy.

[bobter3]

'21 Ford F-350 SRW axle housing collapsing under the weight of the truck and cracking perch welds and u-bolts then loosen up. Don't remember the duration build dates for the recall.

I guess lug bolts should then be replaced each time you remove the wheels.

Like Howard said, TTY bolts are usually specified in their requirements. I would not just arbitrarily replace every bolt I remove, depends on application and the risk factor of where that particular bolt might be used. I totally understand u-bolts, although in the many years of working on all sorts of trailers, cars, trucks and what not, I've never had a failure of a reused u-bolt. But on the my F-350, I would buy new u-bolts or on my RV, same thing. 👍

The are not collapsing under the weight of the truck. They are distorting due to the torque twist from diesel motor. The supplier changed the design without Ford's approval or authorization.

[Bigmo1]

Not re-using the spring u-bolts is incorrect. They are torqued to a certain value and are re-used. They are not torqured to yield, or at least not most 1/2 ton and up.

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[89BUCHANAN]

Looks to me that might be a chevy 2500 hd

[Dawgfever]

I have to agree with Rich. Trailer pushed the truck forward over the locked up rears. Pin weight would have made the rears grab the road while all else moves forward at a faster rate.

[FjClay]

Chevy testing out prototype 4 wheel steering.