Have a problem with the torque converter on your motorhome or tow vehicle not staying locked up? Check for a faulty brake light switch or throttle position sensor.
Any time you tap the brakes, the brake light switch sends a signal to unlock the converter, so if it’s faulty your torque converter will act up.
A faulty throttle position sensor may be the cause of your problem especially if the symptoms seem to be heat sensitive since it is positioned where heat builds up that can damage the sensor and or wires.