swathdiver
Full Access Member
The thermostat was introduced on the 6L80s on the K2XX platform (2015-2020). They are designed to fail open.
Transmission thermostat
- Thread starter Rickpo
- Start date
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Barely hit 145 in the winter and 165 in the summer I live in the Desert so not having one is necessary.... it does have a tras cooler
When you drive to warm humid climates does it run hotter? I know that systems like a/c do real well in dry desert heat but work the hardest in hot AND humid weather.
I would be curious if one ever failed closed. We all know that designing something to work one way is never an 100% guarantee that it will. Just playing devil's advocate.
Mechanic421
06 Denali XL
Ok I just left south Florida and yes humid and hot as f$&@! Every thing engine,transmissions what ever u name it!
I agree
It will take an act of God to get that info. GM will not release whether the fail safe closed instead of opened. Shall see.
Mechanic421
06 Denali XL
Not Florida Everything much cooler!
67RS427
Full Access Member
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I wouldn't worry about deleting it unless you live in a hot ONLY climate... I added an aftermarket one to my system so in the winter the fluid bypasses my extra coolers and uses the radiator to warm up the trans fluid quicker. When it's warm enough, the thermostat opens and runs to 2 extra coolers. I've never had an issue with my transmission overheating and I see some hot temps during Michigan summers. I should warn all of you thinking about deleting those that a COLD transmission can be just as bad as a HOT one. In the winter, I never see my temps go above 130-150 and ideally these transmissions should be ran at 165-185. 185 is the actual desired temp, any colder or hotter and you risk extra wear and tear on the clutch packs.
