Transmission Input and Intermediate Speed Sensors
The input and intermediate speed sensors are housed together in one component assembly. The sensor is mounted on the exterior of the transmission case. Each sensor is triggered by a separate reluctor ring inside the transmission case. The input and intermediate speed sensors are both hall-effect type sensors. The TCM supplies a single 9 V reference circuit to power up both sensors. Each sensor has an independent signal circuit that returns to the TCM. The TCM uses the signals to determine the rotational speed of the input shaft and the reaction gear set. As the rotational speed of the reluctor wheel increases, the frequency of the speed signal increases. The transmission control module uses this information along with the output speed sensor signal to determine transmission line pressure, shift patterns, correct gear ratio and torque converter clutch slip speed.
- The input reluctor ring is part of the 5-7-R and 6-7-9 clutch subassembly.
- The intermediate reluctor ring is part of the 3-8 and 5-7-R clutch hub assembly.