Mechanical overrev, test for issues?

[ZeroTX]

So on a road trip it was my wife's turn to drive and she did a 5-2 downshift while trying to pass (instead of 5-4). Rear wheels seemed to lock up and I yelled "clutch clutch clutch!!!!" ... I had no way of seeing the RPMs from the passenger seat, but my radar detector shows speed and it was 75 or so. Does this sound like a fatal mechanical overrev? If not, why did the rears lock up? I don't hear any weird noises and power felt ok, but I haven't gone really hard on it, because it's full of 90 octane gas I put in when we were at high elevation in New Mexico. Usually run 93 here.

What are probable overrev issues on a Coyote 5.0? Factory redline is 7400 (Gen3). No ticking noises heard... Valves? Bearings? Piston rings? I honestly have no idea. Would it cause damage if it hit 8000 for 2 seconds? What rpm is 75mph in 2nd gear on an MT82 D4 car with 3.55 gears?

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[K4fxd]

Coyotes are pretty tough engines. If it locked the tires and she got the clutch it may not have over reved. The most common problem from a mechanical over rev would be valves hitting pistons. If this happened you would feel a power loss.

 

[KeyLime]

2nd gear in the stock Mustang with 3.55 gearing is about 6970 rpm at 75 mph.

 

[ice445]

Not ideal for the clutch, but the engine will be fine. That's right about the redline for 2nd anyway, so at most you went a few hundred over.

 

[Qcman17]

New wife incoming in 3,2,1… Op I think you are okay and got a break it didn’t rev higher.

 

[MrBD1348]

Clutch probably took a bit of a beating. But the motor should be ok

 

[Cory S]

Coyotes are pretty tough engines. If it locked the tires and she got the clutch it may not have over reved. The most common problem from a mechanical over rev would be valves hitting pistons. If this happened you would feel a power loss.

It would probably take around 9500-10K RPM to do it!
When my intermediate shaft sheared on the 3-4 shift at 8000rpm, the engine zinged like I just added 2-3K rpm LOL.

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