torque FORD FIESTA 2007 Repair Manual

Automatic Tr;
Vehicles Wil
307-01 -6 Transn
~nsmission/Transaxle -
:h: 4-Speed Automatic
~ission (AW81-40) --
DESCRIPTION AND OPERATION
Item Description
I 1 I I st - 3rd gear clutch 1
1 2 14th gear brake I
1 3 1 Reverse gear clutch I
1 4 )2nd - 4th gear brake I
1 5 1 Reverse gear brake I
1 6 1 3rdl4th gear clutch I
1 7 ITorque converter 1
1 8 1 Transmission input shaft I
1 9 I Fluid pump I - --
[ 10 1 Differential assembly I
~l~put wheel, planetary gearset I
11
1 13 1 Planetary gearset I
Intermediate gear stage
vlIlstgear one-way clutch I
1 15 1 2nd gear one-way clutch I
Torque converter with Torque
Converter Clutch (TCC)
Item Description
I 1 I Torque converter housing and impeller I
1 2 1 Turbine wheel 1
1 4 1 Transmission input shaft I
FlGwith roller-type one-way clutch (
The torque converter hydraulically transmits the
output torque from the engine to the input shaft of
the transmission.
The stator increases the torque up to the clutch
point (approx. 90
% speed difference between the
impeller and the turbine wheel).
In order to increase the efficiency of the automatic
transmission, the torque converter is also equipped
with a hydraulically activated TCC
The TCC is applied with slip to ensure soft
engagement.
i
When the TCC is engaged, the torque is '..
transmitted directly from the crankshaft via the
torque converter housing to the transmission input
shaft.
2006.0 Fiesta 1212006 ~380521 en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission (AW81-40)
DESCRIPTION AND OPERATION
The TCC is engaged depending on the current
driving situation when the selector lever is in
I position "D" and 3rd or 4th gear is engaged. When
4th gear is disabled
(OID Off) the TCC is
engaged in 3rd gear depending on the current
driving situation.
Fluid pump and stator shaft
Item Description It sucks up transmission fluid from the oil pan,
1
2
3
2006.0 Fiesta 1212006 G380521 en
Fluid pump housing
4 builds
up the oil pressure and then supplies it under
high pressure to the main control body.
Inner rotor, fluid pump
Outer rotor, fluid pump The
fluid pump is driven by the crankshaft via the
torque converter housing.
transmission housing.
The fluid pump is a G-rotor oil pump.
The stator shaft is bolted to the fluid pump. It
engages via teeth in the stator of the torque
converter and acts as a support for the latter.
Stator
shaft The
fluid pump housing is bolted to the
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Clutches and brakes
/
Description The clutches are multi-plate clutches.
I 1 I I st - 3rd gear clutch I
1 2 14th gear brake I
1 3 1 Reverse gear clutch I
1 4 12nd - 4th gear brake I
1 6 1 3rdl4th gear clutch I
1 7 1 1st gear one-way clutch I
1 8 12nd gear one-way clutch I
The transmission is equipped with three clutches
and five brakes. The brakes
are three multi-plate brakes and two
one-way sprag clutches.
The clutches serve to transmit the torque from the
transmission input
shaft to certain components of
the planetary
gearset.
The brakes serve to hold certain components of
the planetary
gearset.
In order to achieve a given transmission ratio, it is
necessary for at least one component of the
planetary
gearset to be held while the torque is
transmitted to another component.
These combinations produce the different
transmission ratios for the individual gears.
2006.0 Fiesta 1212006 G380521 en
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Automatic Transmission/Transaxle -
Vehicles With: $-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Overview of operation
Item Descri~tion
I 1 I I st - 3rd gear clutch I
1 2 12nd gear one-way clutch I
1 3 12nd - 4th gear brake I
1 4 1 1st gear one-way clutch
1 5 1 Reverse gear brake I
1 6 13rd14th gear clutch
Item Description
1 8 1 Output wheel, planetary gearset
I
1 7 1 From the torque converter
1 9 ( Intermediate gear stage I
I
1 10 1 Differential assembly I
I A I Planetary gearset, rear I
11
12
I B I Planetary gearset, front I
4th gear brake
Reverse gear clutch
2006.0 Fiesta 1212006 ~380521 en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -1 2 Transmission (AW81-40) 307-01 -1 2 --
DESCRIPTION AND OPERATION
Item Description The output wheel of the planetary gearset drives
I 1 I Output wheel, planetary gearset
2
I I 1
The annulus of the planetary gearset is fixedly Any differences in rotational speed between the
connected to the output
wheel of the planetary two halfshafts are compensated by the differential.
gearset.
the input wheel of the intermediate gear stage.
3
4
Main control body
Output wheel, intermediate gear stage
Item Descri~tion The hydraulic lines and pressures are electronically
The output
wheel of
the intermediate gear stage [<.
drives the spur gear of the differential assembly.
Differential assembly
Input wheel, intermediate gear stage The
differential assembly transmits the torque
via
the halfshafts to the front wheels.
In addition, the manual selector slide in the main
control body provides a hydraulic emergency
running programme which
allows the vehicle to be
Manual selector lever driven in 3rd aear with the selector lever in position
.
1
Shift timing solenoid valve
5
2006.0 Fiesta 1212006 ~380521 en
regulated by a proportional solenoid valve (main
regulating valve) and four shift solenoid valves.
1 6 1 SSA shift solenoid valve
SSB
shift solenoid valve
transmission control unit-fail. -
"D", "2" or "ll'and in reverse gear with the selector
lever in position "R if key components or the
The hydraulic pressure is distributed to the The
manual selector slide is actuated by the driver
individual clutches and brakes in the main control via the selector lever, the selector lever cable, the
body. selector shaft lever and the internal gearshift
mechanism.
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Fluid circuit
Item Description
I 1 I Transmission control unit
1 2 1 Solenoid valves and main control body I
1 3 I Clutches and brakes I
1 4 1 Planetary gearset
1 5 1 Fluid pump I
1 6 1Oil pan I
1 7 1 Fluid cooler I
Item Description
1 8 I Torque converter I
I A I Electric actuation of the solenoid valves I
B Actuating pressure of the clutches and
1 lbrakes
I C ITo the oil pan I
I D I From the oil pan I
I E I Fluid pump pressure I
2006.0 Fiesta 121~006 ~380521 en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Item Description
I H I To the fluid cooler I
, i
2006.0 Fiesta 1212006 G380521 en
F
G
Lubrication
To the torque converter
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -1 9 Transmission (AW81-40) 307-01 -1 9
DESCRIPTION AND OPERATION
1 2 I Transmission input shaft I
Item Description The planet gear carrier (6) is held by the I st gear
1 3 1 I st - 3rd gear clutch I
I 1 I From the torque converter
1 4 1 Small sun gear I
one-way clutch (5).
1 5 1 1st gear one-way clutch I
1 6 1 Planet gear carrier I
1 7 Reverse gear brake I
1 8 1Short planet gear I
1 9 1 Long planet gear I
1 0 Annulus
and output wheel of the planetary
1 1 gearset
vllntermediate gear stage I
1 12 1 Differential assembly I
N0TE:ln selector lever position "1 " the planet gear
carrier is also held by the reverse gear brake
(7)
(engine braking).
The short planet gears (8) are driven by the small
sun gear in the opposite direction of rotation to the
output from the engine.
The short planet gears drive the long planet gears
(9) in the same direction of rotation as the output
from the engine.
The long planet gears drive the ring gear (10) in
the same direction of rotation as the output from
the engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage (1 1
) in the opposite
direction of rotation to the output from the engine.
I B I Planetary gearset, front I the output from the engine.
A
Drive is transmitted from the torque converter (1)
to the transmission input shaft (2) and via the
/ 1st-3rd gear clutch (3) to the small sun gear (4).
2006.0 Fiesta 1212006 G380528en
Planetary gearset, rear The intermediate gear stage drives
the differential
assembly (12) in the same direction of rotation as
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -21 Transmission
(AW81-40) 307-01 -21
DESCRIPTION AND OPERATION
Item Description
111lst gear clutch I
I
1 4 1 Small sun gear I
--
I
2
1 9 1 Long planet gear I
From the torque converter
Transmission input shaft
6 8
10 Annulus
and output wheel of the planetary
I lgearset
Planet gear carrier
Short planet gear
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
The large sun gear (15) is held by the 2nd gear
one-way clutch (14) and the 2nd-4th gear brake
(1 3).
N0TE:ln selector lever position "2" the large sun
gear is also held by the 4th gear brake (1 6) (engine
braking).
The short planet gears (8) are driven by the small
sun gear in the opposite direction of rotation to the
output from the engine.
The short planet gears drive the long planet gears
(9) in the same direction of rotation as the output
from the engine.
The long planet gears are supported by the large
sun gear which is being held, and they drive the
planet gear carrier (6) in the same direction of
rotation as the output from the engine.
The long planet gears drive the ring gear (10) in
the same direction of rotation as the output from
the engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
A
1st-3rd gear clutch (3) to the small sun gear (4).
B
2006.0 Fiesta 1212006 G380528en
direction of rotation to the output from the engine.
Planetary gearset, rear intermediate
gear stage (1 1 ) in the opposite
Drive is transmitted from the torque converter (1 ) assembly (12) in the Same direction of rotation as
to the transmission input shaft (2) and via the the
output from the engine.
Planetary
gearset, front
The intermediate gear stage drives the differential I
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
1 3 1 I st - 3rd gear clutch I
Item Description
1 4 1 Small sun gear I
1
2
-
1 6 1 Planet gear carrier I
From the torque converter
Transmission input shaft
10 Annulus and output wheel
of the planetary
1 lgearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
)I 2nd - 4th gear brake I
1 14 12nd gear one-way clutch I
1 15 1 Large sun gear I
1 17 1 3rdl4th gear clutch I
I A I Planetary gearset, rear I
I B I Planetary gearset, front I
The drive is transmitted from the torque converter
(I) on the one hand to the transmission input shaft
(2) and via the 1st-3rd gear clutch (3) to the small
sun gear
(4), and on the other hand from the
transmission input shaft via the
3rdl4th gear clutch
(17) to the planet gear carrier (6).
As the drive is transmitted to two components
simultaneously, there are no relative movements
within the planetary
gearset. The planetary gearset
rotates as a complete unit.
N0TE:The 2nd-4th gear brake (1 3) remains
engaged, but the large sun gear
(I 5) can rotate in
the same direction of rotation as the output from
the engine by means of the 2nd gear one-way
clutch
(14), as a result of which the 2nd-4th gear
brake has no influence on the transmission ratio.
The Annulus (1
0) is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage (1 1
) in the opposite
direction of rotation to the output from the engine.
The intermediate gear stage drives the differential
assembly (12) in the same direction of rotation as
the output from the engine.
2006.0 Fiesta 1212006 G380528en
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