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I've done a couple cars, same for transmissions, I'd say it depends on their definitions of shavings. If it's actual shavings, like what you might get if you were drilling something, or looks like fingernail clippings say, that's pretty bad. If it's a little bit of sparkle in the fluid and you'd have to see pieces under a microscope, that's fine (well, I'd call it normal anyhow).
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