Well it's not exactly a rare occurrence and all makers will test their boxes to see what happens when it does. The answer is the pawl breaks off and drops into the sump.
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16 years ago
Automatic Gearboxes
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16 years ago
Who says it's going to drop into the sump when doing a reasonable speed?
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16 years ago
On every box I've seen you would have to pass through Neutral and Reverse before reaching Park. What vehicle was this?
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16 years ago
Because you can't force it into mesh at a 'reasonable speed'. Anymore than you can force a crash gearbox into gear without using the clutch - the teeth simply won't mesh until the speed is low enough. They will skate across the tops of one another.
I can't claim to know every auto box but have had enough of them apart to guess that they're all pretty similar in this respect.
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16 years ago
I did the full throttle third gear to reverse shift in a CVT based Ford Escort. It just screamed a bit and stood on it's nose.
Worked fine for the rest of the 300 mile or so trip.
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16 years ago
Yup, dumping it into reverse when the brakes failed blew a hose of the cooler, but the brake pawls such a naff bit of metal om nost gearboxes that even if it didn't end up in the sump it wouldn't do much. (you can try dumpin an auto into park & it does make a lot of noise & you never trust it afterwards, but that's all)