Warning signs the Automatic Transmission Cooler is failing:
- Transmission overheating: Your temperature gauge may run hotter than normal.
- Transmission fluid leaks: Look for red or brown fluid under your car.
- Slipping gears: The transmission may struggle to shift smoothly.
- Rough or erratic shifting: Shifts may feel harsh or unpredictable.
- Unusual noises: Whining or clunking sounds from the transmission area.
How to test if this part is the problem vs other components:
- Check transmission fluid level and condition: Low or burnt fluid indicates a problem.
- Inspect the cooler for leaks or damage: Look for cracks, dents, or fluid seepage.
- Pressure test the cooling system: This checks for leaks within the cooler itself.
- Check the transmission cooler lines: Make sure they aren't blocked or damaged.
- If possible, measure the temperature of the fluid entering and exiting the cooler. A significant difference indicates proper function.
Common failure causes for this part:
- Corrosion: Road salt and debris can corrode the cooler over time.
- Physical damage: Impacts from road debris can damage the cooler.
- Clogging: Debris in the transmission fluid can clog the cooler's passages.
- Internal leaks: Seals and welds can fail, causing leaks.
- Overheating: Repeated overheating can weaken the cooler's structure.