Transmission Description (G2162861): Description: Transmission
The transmission comprises the main transmission housing which contains all of the transmission components.
A fluid pan is attached to the lower face of the transmission housing and is secured with bolts. The fluid pan is sealed to the transmission housing with a gasket. Removal of the fluid pan allows access to the Mechatronic valve block and the electric ATF pump. The fluid pan has magnets located at the rear which collects any ferrous metallic particles present in the transmission fluid.
An ATF filter is located inside the fluid pan. If the ATF becomes contaminated or after any service work, the fluid pan with integral ATF filter must be replaced.
The transmission does not have a bowden cable for park lock operation. This is initiated electronically when the TCS is moved to the Park (P) position. An EPR mechanism is provided to release the park interlock if a failure occurs.
The ZF 8P75XPH transmission has two ATF pumps:
- One mechanical ATF pump
- One electric ATF pump.
The mechanical ATF pump is driven by a simplex chain and two drive gears from the input shaft.
The integrated electric ATF pump ensures pressurized ATF is available to the shift elements as quickly as possible when the engine is started. The electric ATF pump is located at the rear of the transmission.
The transmission housing provides protection for the hybrid drive assembly and also provides the attachment for the transmission to the engine.
The transmission housing contains the following major components:
- Input shaft
- Output shaft
- Mechatronic valve block which contains the solenoids, speed sensors and the TCM .
- Three rotating multiplate drive clutches.
- One fixed multiplate brake clutch and an integrated acceleration element.
- Four planetary gear sets.