Ford F-Series Super Duty Class A 2019 Owner's Manual page 27

Information Displays
Transmission
Message Action
CHECK TRANS TEMPERATURE The transmission fluid is overheating. This warning
may appear when towing heavy loads or when driving
in a low gear at a high speed for an extended period
of time. Stop your vehicle as soon as safely possible,
turn off the engine and let the transmission cool.
SHIFT TO PARK A reminder to apply the brakes, then shift to park.
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Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 201803, Third-Printing-