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Old 05-31-2013, 01:19 PM
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DaveInDenver DaveInDenver is offline
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Join Date: Jun 2006
Location: Larimer County
Posts: 6,615

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.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29

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