AUTOMATIC TRANSMISSION – ZF HP 44-2-38 DESCRIPTION AND OPERATION Gear Selector Lever Assembly 1 Selector cable 2 Shift interlock solenoid 3 Selector lever 4 Manual +/– Steptronic switch 5 Selector knob and shroud 6 Park/Reverse release button 7 Selector lever cover 8 High/Low range selector switch 9 Selector position LED display 10 Hill Descent Control (HDC) switch 11 Key interlock cable 12 Key interlock mechanism 13 Selector lever position switch 14 Manual/Sport switch 15 Mounting plate The gear selector lever assembly is located in a central position on the transmission tunnel, between the front driver and passenger seats. Amounting plate is secured to the transmission tunnel and provides the mounting for the selector lever assembly.
AUTOMATIC TRANSMISSION – ZF 5HP24 DESCRIPTION AND OPERATION The selector lever comprises a cast mounting plate which provides for the location of the selector components. The lever is connected to a gimbal mechanism which allows for the selection of PR, ND is a forward or backward direction and selection between automatic and manual/sport in a left/right transverse direction. When manual/sport mode is selected, the lever can be moved in a forward or backward direction to selector for manual (Steptronic) operation. When the selector lever is moved to the MS position, the Bowden cable to the transmission is mechanically disconnected at the shifter. If left in Sport mode all gear changes are performed automatically. If Manual (Steptronic) mode is selected, all gear changes are based on switched ground inputs received by the EAT ECU from the Manual +/– Steptronic switch. The selector lever mechanism houses the following components: l Manual +/– Steptronic switch l Shift interlock solenoid l High/Low range selector switch l Hill Descent Control (HDC) switch l Selector position LED display l Selector lever position switch l Manual/Sport switch l Key interlock mechanism. There are four selector lever positions and two additional positions for manual/sport operation: l P ( Park) – Prevents the vehicle from moving by locking the transmission l R (Reverse) – Select only when the vehicle is stationary and the engine is at idle l