Howdy,
Just bought a 2019 Tundra 5.7L 6 speed automatic with tow package, to tow an Airstream. Previously same Airstream with a Tacoma had ATF in the range of 150° to 190° (190° towing up 6% grade in 80° ambient with head wind).
Tundra is running 215° without towing... Fwy driving 65-75mph. Lost of "complaints" about this but consensus is Tundras run hotter for a variety of reasons BUT reading here and elsewhere the ATF itself will suffer with 220° being a caution zone.
It seems part of the issue is a lack of a true ATF cooler and uses a heat exchanger and Toyota more concerned with running cold than hot...
Fine Toyota designed a Tundra transmission that excels at 220°+ BUT can modern ATF actually handle prolonged temperatures without premature failure?
Guys on the Tundra forum are all over the map with ideas but nothing confirmed.
So... CAN ATF handle these extremes day and day out?
Thanks,
Whalstib
Just bought a 2019 Tundra 5.7L 6 speed automatic with tow package, to tow an Airstream. Previously same Airstream with a Tacoma had ATF in the range of 150° to 190° (190° towing up 6% grade in 80° ambient with head wind).
Tundra is running 215° without towing... Fwy driving 65-75mph. Lost of "complaints" about this but consensus is Tundras run hotter for a variety of reasons BUT reading here and elsewhere the ATF itself will suffer with 220° being a caution zone.
It seems part of the issue is a lack of a true ATF cooler and uses a heat exchanger and Toyota more concerned with running cold than hot...
Fine Toyota designed a Tundra transmission that excels at 220°+ BUT can modern ATF actually handle prolonged temperatures without premature failure?
Guys on the Tundra forum are all over the map with ideas but nothing confirmed.
So... CAN ATF handle these extremes day and day out?
Thanks,
Whalstib