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Old 05-31-2013, 12:19 PM
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DaveInDenver DaveInDenver is offline
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Location: Larimer County
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Some auto tranny fluids will start to flash in the low-to-mid 300F range, typically most by 350F. Synthetics usually are safe above 400F. ATF datasheets spec viscosity at 100C. I guess the warning light really is a warning light, so if it comes on you are taking a ride in the danger zone and like Steve says, flush and fill would be wise because you might be cooking the lube.
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