Not Ranked
It was noted in an earlier post by N2Venom, that Roush has said the warranty is over. I find that troubling, at least. The nut should not have backed off, it was also indicated that a couple of other nuts may have been (or is that "were") loose as well.
Frankly, if so, this a manufacturers error, a Roush error. If they have a known issue with rocker shaft bolts/nuts coming loose steps should be taken to address that issue. Locktite perhaps, or a note that those bolts/nuts in question should be retorqued. If it's a rare occurence, that would only support a defect in assembly technique, somebody didn't use the torque wrench properly.
As was previously noted the expected cost of repair parts is $600. That must include substantially more than just the rocker shaft!!! What else was damaged that would justify such an exceedingly high price for parts that appear to only a broken shaft, possibly a new nut or bolt? Still smells awfully fishy to me...
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