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What Causes the High Temperature Alarm in a Dual-Clutch Transmission?

1 Answers

Lucas

07/30/25 9:09am

High temperature alarms in dual-clutch transmissions can be attributed to three main causes: lack of lubrication in dry dual-clutch systems, elevated engine and coolant temperatures, and clogged radiator grilles. Dry dual-clutch systems lack oil cooling: Overheating often occurs, especially in stop-and-go traffic conditions. When temperatures become excessively high, the transmission activates a self-protection mode and shuts down. Elevated engine and coolant temperatures: Normal transmission oil temperature ranges between 90-100 degrees Celsius. Prolonged exposure to temperatures above this range can cause severe damage to the transmission. Shortly after starting the car, the automatic transmission fluid (ATF) temperature rises. During hill climbing, high ambient temperatures, sustained high-speed driving, or stop-and-go city traffic, ATF temperatures can exceed the safe threshold (80°C). Clogged radiator grilles: This can cause thermostat sticking, generating additional heat.

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