Group 43 MID 130 Transmission Control Unit Split Cylinder Position Sensor The Split Cylinder Position Sensor is located in the transmission on the lower portion of the control housing. 1st/Reverse Cylinder Position Sensor The 1st/Reverse Cylinder Position Sensor is located in the transmission on the lower portion of the control housing. 2nd/3rd Gear Cylinder Position Sensor The 2nd/3rd Gear Cylinder Position Sensor is located in the transmission on the lower portion of the control housing. Transmission Control Module (TCM) The TCM communicates with the Gear Selector Control Module (GSCM) and other ECMs in the vehicle through the SAE J1939 and SAE J1587 data links.
The functionality of the TCM can be different depending on the type of software packages that are installed. The TCM contains the following components: SAE J1587 data link SAE J1939 data link CAN 2 data link 11 Powerdrivers Inclination Sensor Temperature Sensor 9 Controlling Solenoid Valves The Transmission Control Module located on the upper portion of the control housing. Lubrication System The transmission is lubricated through a combination of pressure from an oil pump and splashing. The oil is led into the main shaft to lubricate and cool the range gears, the input shaft and main shaft bearings. The countershaft brake and output shaft bearings, are also lubricated.
The lubrication system has two overflow valves. One valve ensures that the transmission is lubricated if the filter gets blocked while the other prevents excessive pressure in the system, e.g. during cold start. The valves are made up of a compression spring and a valve peg. 5