15/04/2026
Here it is , you've been waiting for a while to be featured on our page, and now you are.
Today, we worked on a unique job that doesn't come up often, mainly because we specialize in a different car make. The task involved a recurring engine light issue, which, upon diagnosis, revealed a problem with the transmission oil cooler valve.
The transmission oil cooler regulates the automatic transmission fluid (ATF) temperature by controlling engine coolant flow to the transmission oil cooler. It functions as an electronic thermostat, enabling the transmission to reach optimal operating temperature quickly and efficiently, then cooling it under heavy loads to prevent overheating.
As you can see in the photos, this part is relatively simple, consisting of a connection plug and two pipes (supply and return).
The part was relatively easy to remove and replace due to its location on the passenger side of the gearbox, held in place by two bolts. However, it does require time to remove surrounding pipes and wires for access. Additionally, you need to clamp the coolant hoses before removal to minimize coolant loss during the job.
After installation, we topped up the engine coolant and brought the vehicle up to temperature. We then road-tested it and performed one final diagnostic check to ensure the fault was resolved.