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Transmission
Description and Operation
Description
Selector Lever
The selector lever assembly consists of a lever and a cover
attached to a base. The selector lever base is located on a
gasket and secured to the transmission tunnel by 4 bolts. A
latch in the lever engages with detents in the base.
The selector lever positions operate as follows:
• P: prevents the vehicle from moving by locking the
transmission
• R: select only when vehicle is stationary and the engine
is at idle
• N: no torque transmitted to the road wheels
• D: this position utilises all five forward gears. It is the
default position selected for conventional driving
• W: this position causes the TCM to adopt a Winter mode
and is used for starting-off on slippery road surfaces
• S: Sports mode
• +/- Tiptronic
Tiptronic Gear Changes
If the selector lever is moved from the 'D' position to the right,
the system will automatically begin to operate in a Sport mode
with different gear shift parameters. The Tiptronic mode is
separate from Sport mode and will give full, manual control of
gear shifts by sequentially moving the selector lever. Movement
of the selector lever in the forward (+) direction changes the
transmission up the ratios and movement in a rearward (-)
direction changes the transmission down the ratios. Some
Version 2.0
models have additional controls on the steering wheel. Once
Tiptronic has been selected Sport mode cannot be accessed
until the gear selector has been returned to the D position.
Shift Interlock Solenoid
1. Gear selector
2. Spring loaded interlock hook
3. Pivot
4. Solenoid pushrod
5. Interlock solenoid
The transmission incorporates an interlock solenoid at the
bottom of the selector lever. This is controlled by the TCM.
When the gear selector is in 'P' and the solenoid is not
energised a spring loaded hook engages with a corresponding
hook at the bottom of the selector lever, preventing accidental
movement of the gear selector. The solenoid is only energised
when the handset is docked, the selector lever is in 'P', and
the foot brake is applied.
Energising the solenoid pushes the solenoid pushrod towards
the rear of the car. This rotates the interlock hook around its
pivot, against spring pressure, and allows the gear selector to
be moved from the 'P' position.
Selector Cable
The selector cable is a Bowden type cable that connects the
selector lever to an input lever on the transmission. A 'C' clip
secures the outer cable to the selector lever assembly; the
transmission end of the outer cable is secured to a bracket
on the transmission by an integral clip. The inner cable is
adjustable at the connection with the transmission input lever.
Shift Lock Control-AT
348
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