Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

							NOTE: Refer to Shift Elements illustration for key
Power Flow 4th Gear
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							The gear selector lever and the manual selector spool
valve are in the D position. Engine torque is transmitted
from the torque converter turbine shaft to ring gear 1 of
the single web planetary gear train and the outer plate
carrier of clutch E.
Ring gear 1 drives the planetary gears which rotate
around sunwheel 1. This drives the planetary gear carrier
1 and also the outer plate carrier of clutch A and the
inner plate carrier of clutch B.
When clutch A is engaged, sunwheel 3 in the double
web planetary gear train is driven and meshes with the
short planetary gears.
The double web planetary gear carrier is driven via
clutch E which is engaged. The long planetary gears,
which are also meshed with the short planetary gears,
and the double web planetary gear carrier, drive ring
gear 2 in the direction of engine rotation.
NOTE: Refer to Shift Elements illustration for key
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							Power Flow 5th Gear
The gear selector lever and the manual selector spool
valve are in the D position. Engine torque is transmitted
from the torque converter turbine shaft to ring gear 1 of
the single web planetary gear train and the outer plate
carrier of clutch E.
Ring gear 1 drives the planetary gears which rotate
around sunwheel 1. This drives the planetary gear carrier
1 and also the outer plate carrier of clutch A and the
inner plate carrier of clutch B.
When clutch A is engaged, sunwheel 3 in the double
web planetary gear train is driven and meshes with the
short planetary gears.
The long planetary gears, which are also meshed with
the short planetary gears, and the double web planetary
gear carrier, drive ring gear 2 in the direction of engine
rotation.
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							NOTE: Refer to Shift Elements illustration for key
Power Flow 6th Gear
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							The gear selector lever and the manual selector spool
valve are in the D position. Engine torque is transmitted
from the torque converter turbine shaft to ring gear 1 of
the single web planetary gear train and the outer plate
carrier of clutch E.
Clutches A and B are released, removing the effect of
the single web planetary gear train.
Clutch brake C is applied which locks sunwheel 2 to
the transmission housing.
Clutch E is engaged and drives the double web
planetary gear carrier. This causes the long planetary
gears to rotate around the fixed sunwheel 2 and transmit
drive to ring gear 2 which is driven in the direction of
engine rotation.
NOTE: Refer to Shift Elements illustration for key
Automatic TransmissionLesson 2 – Powertrain
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							Power Flow Reverse Gear
The gear selector lever and the manual selector spool
valve are in the R position. Engine torque is transmitted
from the torque converter turbine shaft to ring gear 1 of
the single web planetary gear train and the outer plate
carrier of clutch E.
Ring gear 1 drives the planetary gears of the single web
planetary gear train which rotate around the fixed
sunwheel 1. This transmits the drive to the single web
planetary gear carrier, the outer plate carrier of clutch
A and the inner plate carrier of clutch B.
With clutch B applied, sunwheel 2 in the double web
planetary gear train is driven and meshes with the long
planetary gears.
The double web planetary gear carrier is locked to the
transmission housing by brake clutch D. This allows
ring gear 2 to be driven in the opposite direction to
engine rotation by the long planetary gears.
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							NOTE: Refer to Shift Elements illustration for key
SELECTOR POSITION SWITCH
The Mechatronic valve block contains a position switch
which is mechanically connected to the selector spool
valve. The selector spool valve is connected by a
selector shaft to the selector lever via a Bowden selector
cable.
The signals from the position switch are used by the
TCM to determine the P, R, N or D selection made by
the driver.
FLUID COOLING
The transmission fluid cooler is an integral part of the
engine cooling radiator. The transmission is connected
to the fluid cooler via flexible hoses and metal pipes.
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							NOTE: 4.0L V6 Petrol shown, 4.4L V8 and TdV6 similar
Transmission cooler1
Return pipe (To transmission)2
Feed pipe (From transmission)3
The transmission cooler is integrated into the left hand
end tank of the engine cooling radiator. The transmission
fluid is cooled by the temperature differential between
the transmission fluid and the engine coolant and also
by airflow over cooling fins on the end tank.
Fluid is supplied from the transmission fluid pump into
the lower connection of the cooler. After passing through
the cooler, the fluid passes out of the upper connection
and is returned to transmission fluid pan.
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Lesson 2 – PowertrainAutomatic Transmission 
						

							GEAR SELECTOR LEVER ASSEMBLY
Selector lever1Finisher2
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							PRND display3
M/S display4
Switch pack and finisher5
Shutter6
Selector assembly7
Interlock emergency release lever8
Mounting plate9
Seal10
Selector cable11
The gear selector lever assembly is located in a central
position on the transmission tunnel, between the front
driver and passenger seats and is secured to the
transmission tunnel closure plate. The selector lever
comprises a moulded plastic housing which provides
for the location of the selector components.
The lever is connected to a crosspiece which allows for
the selection of P, R, N, D in a forward or backward
direction and selection between automatic and
manual/sport mode in a left/right transverse direction.
When manual/sport mode is selected the lever can be
moved in a forward or backward direction to select +
or - for manual (CommandShift™) operation. If left in
Sport mode all gear changes are performed
automatically.
If Manual (CommandShift™) mode is selected, all gear
changes are based on inputs received by the TCM from
the manual +/- hall effect sensors located on the PCB.
The selector lever mechanism houses the following
components:
•Electronic Printed Circuit Board (PCB)
•Shift Interlock solenoid
•Park and Neutral locking levers.
There are four selector lever positions and two additional
positions for manual/sport operation:
•P (Park) - Prevents the vehicle from moving by
locking the transmission
•R (Reverse) - Select only when the vehicle is
stationary and the engine is at idle
•N (Neutral) - No torque transmitted to drive wheels
•D (Drive) - This position uses all six forward gears
in high and low ranges
•M/S (Sport Mode) - This position uses all forward
gears in D but will upshift at higher engine speeds
to improve acceleration
•+ and - (Manual CommandShift™ mode) -
Movement of the selector lever in the +/- positions,
when the lever is in the M/S position, will operate
the transmission in manual (CommandShift™) mode
allowing the driver to manually select all six forward
gears
The selector lever position is displayed to the driver on
the selector position LED display and in the instrument
cluster. In CommandShift™ mode, if a gear is selected
but the TCM logic prevents selection of that gear, the
requested gear will be initially displayed. The TCM will
engage the next allowed gear and then display that gear.
Sport/Manual +/- CommandShift™ Switch
The PCB contains the hall effect sensors to activate the
sport/manual mode and also the sensors which provide
the +/- signals. When the selector lever is moved to the
manual/sport position, the lower magnet located in the
selector lever is moved within proximity of the M/S hall
effect sensor on the PCB. This provides the momentary
signal which is received by the TCM, which in turn
initiates sport mode.
When the lever is moved to the + or - position, the
magnet is moved within proximity of one of the hall
effect sensors positioned either side of the M/S hall
effect sensor. When an input from either the + or -
sensors is received, manual CommandShift™ mode will
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