Exterior

The transmission's mechanical components are enclosed in the torque converter housing (1), the transmission housing (2), with integrated final drive housing (3) and valve housing cover (4). The engine speed sensor (rpm sensor) (5) in the transmission housing, the temperature sensor (6), the speedometer sensor (7) and the gear position sensor (8), which is affected by the gear selector shaft (control shaft) are, like other electrical components, coupled to a connector (9). The gear position sensor, which reports to the control module which gear has been selected, also contains a back-up (reversing) light switch and a starter inhibitor switch.

Solenoid valves (SL, S1, S2, STH) sit in the hydraulic system valve housing (control system), which is located beneath the valve housing cover on the transmission. Solenoid valve SL regulates the torque converter lock-up function, and valves S1 and S2 control shifting. These valves are activated by the transmission control module, as is solenoid valve STH, which controls the transmission line pressure.

The electromagnetic rpm sensor (5) is activated by a toothed impulse wheel. By comparing the engine and transmission rpm, the control module can determine the amount of slippage in the torque converter.

The NTC type temperature sensor (6) measures the oil temperature. The control module receives this information and utilizes it to calculate shifting and lockup engagement points (temperature controlled lock-up). The lower limit for temperature activated lock-up is at an oil temperature of 20 °C (68 °F). Below this limit there is no lock-up function engagement so the transmission reaches its normal operating temperature faster. There is also an upper limit for extended engagement, at a temperature of 115 °C (239°F) or 130 °C (266°F) for the USA and Canada.

The gear position sensor has three separate functions:

- Sending electrical signals that tell the control module which gear has been selected.

- Operating the back-up (reversing) lights when the gear selector is in position R.

- Preventing anyone starting the engine without first selecting position P or N. This signal is also passed on to the engine management system and is used for drive compensation in connection with idling.

The transmission and final drive share a common oil pan. A dipstick in the engine compartment is used to check the oil in the transmission.