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What Causes Excessive Transmission Temperature?

2 Answers

DeElliott

07/28/25 11:58pm

Reasons for high transmission temperature: 1. Clogged radiator grille; 2. Transmission clutch slipping, generating additional heat; 3. Insufficient flow in transmission cooling oil circuit; 4. Thermostat sticking. Solutions: 1. Clean the radiator; 2. Repair the torque converter; 3. Repair the valve body or replace the oil pump; 4. Replace the thermostat. Additional information: Generally, the active safety features already present in a vehicle's safety system can ensure safe and reliable operation during both normal road and off-road driving. When transmission fluid temperature reaches 115 degrees Celsius, the DTC will set and store information to assist technicians in analysis.

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OChloe

08/12/25 4:16am

I've encountered similar situations where transmission overheating usually stems from driving habits and external factors. For example, frequent high-intensity driving, like towing a trailer or climbing steep hills, can overload the transmission, generating excessive frictional heat. Another common cause is cooling system failure, where the radiator gets clogged with dust, reducing airflow and heat dissipation efficiency. Insufficient oil or aged oil is also a frequent issue—old oil loses its lubrication and cooling capabilities, leading to rising temperatures. Additionally, in older vehicles, internal components like slipping clutches or faulty oil pumps can cause overheating. If not addressed promptly, this can damage shift mechanisms and increase repair costs. It's advisable to check oil levels and radiator cleanliness, and avoid prolonged extreme driving.

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