Over Temperature Messages

The transmission clutch temperatures are modelled within the Transmission Control Module (TCM). The 8HP76 transmission incorporates additional monitoring of the torque converter as this is worked hard on low speed crawl situations. The TCM uses algorithms to detect high load on the launch clutch and when detected provides a message to the driver to select low range. Further monitoring provides a critical warning to the driver with an audible warning from the Instrument Cluster (IC) to select low range if this first message is ignored.