2007 FORD FIESTA differential

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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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -25 Transmission (AW81-40) 307-01 -25
DESCRIPTION AND OPERATION
Item Descriotion
I 1 I From the torque converter I
~l%ansmission input shaft I
1 4 1 Small sun gear I
1 6 1 Planet gear carrier I
1 8 1Short planet gear I
1 9 1 Long planet gear I
10 Annulus and
output wheel of the planetary
/ (gearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
1 13 12nd - 4th gear brake I
1 14 1 2nd gear one-way clutch I
1 15 1 Large sun gear I - --
1 16 14th gear brake I
1 17 1 3rdl4th gear clutch I
~Iianetary gearset, rear I
I B I Planetary gearset, front I
Drive is transmitted from the torque converter (I)
to the transmission input shaft (2) and via the
3rdl4th gear clutch (1 7) to the planet gear carrier
(6).
The large sun gear (15) is held by the 4th gear
brake
(16), the 2nd gear one-way clutch (14) and
the 2nd-4th gear brake
(1 3).
N0TE:The short planet gears (8) and the small
sun gear (4) co-rotate, but they have no influence
on the transmission ratio.
The long planet gears (9) drive the annulus (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
(11) 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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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -27 Transmission (AW81-40) 307-01 -27
DESCRIPTION AND OPERATION
Item Description
I 1 I From the torque converter I
1 2 I Transmission input shaft I
1 4 ISmaII sun gear I
11 Planet gear carrier I
1 7 1 Reverse gear brake I
1 8 1Short planet gear I
1 9 1 Long planet gear I
10 Annulus and output wheel
of the planetary
I (gearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
1 15 1 Large sun gear I
1 18 1 Reverse gear clutch I
I A I Planetary gearset, rear I
I B I Planetary gearset, front I
Drive is transmitted from the torque converter (1)
to the transmission input shaft
(2) and via the
r reverse gear clutch (1 8) to the large sun gear (1 5).
The planet gear carrier
(6) is held by the reverse
gear brake
(7).
The large sun gear drives the long planet gears
(9) in the opposite direction of rotation to the output
from the engine.
N0TE:The short planet gears (8) and the small
sun gear (4) co-rotate, but they have no influence
on the transmission ratio.
The long planet gears drive the annulus (1
0) in the
opposite direction of rotation to the output from the
engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage (I
I ) in the same direction
of rotation as the output from the engine.
The intermediate gear stage drives the differential
assembly (1 2) in the opposite direction of rotation
to the output from the engine.
2006.0 Fiesta 1212006 G380528en
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Automatic TransmissionlTransaxle -
Vehicles With: 4-Speed Automatic
307-01 -37 Transmission
(AW81-40) 307-01 -37
DESCRIPTION AND OPERATION
Sensors
OSS sensor
TSS sensor
The TSS sensor is an inductive pickup.
It measures the transmission input speed via the
outer plate carrier of the
3rdl4th gear clutch and
sends the signal to the transmission control unit.
The transmission control unit uses this signal for:
Torque reduction during gearshifts,
Pressure control during gearshifts,
Shift timing adaptation during upshifts,
Shift timing adaptation during shifts from 3rd to
4th gear,
Shift timing adaptation during shifts from 4th to
3rd gear,
Avoidance of gearshift judder during
engagement of a transmission range,
Torque reduction when pulling away.
Consequences of signal failure:
No TCC,
no torque reduction,
no shift timing adaptation,
no 4th gear. The
OSS sensor is a Hall sensor.
It is mechanically connected via a gear to the input
wheel of the differential assembly.
It measures the vehicle speed via the input wheel
of the differential assembly and sends the signal
to the transmission control unit.
The transmission control unit uses this signal for:
Gearshift control,
Engagement of the TCC,
Torque reduction during gearshifts,
Pressure control during gearshifts,
Shift timing adaptation during upshifts,
Shift timing adaptation during shifts from 3rd to
4th gear,
Shift timing adaptation during shifts from 4th to
3rd gear,
Reverse gear safety strategy,
Avoidance of gearshift judder during
engagement of a transmission range,
Torque reduction when pulling away,
Hill climb mode,
Hill descent mode.
2006.0 Fiesta 1212006 G380530en
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308-0316 Manual Transrnission/Transaxle 308-03-6
DESCRIPTION AND OPERATION
Transmission construction
/"
2006.0 Fiesta 1212006 G281365en
Item Description Item Description
I
2
3
4
6
7
8
9
5th gear housing
Transmission side housing halves
Breather
Hydraulic clutch connection Slave cylinder with integral release
bearing
Input shaft
Output shaft Differential assembly
5 Clutch side housing halves
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308-0318 Manual Transmission/Transaxle 308-03-8
DESCRIPTION AND OPERATION
Output shaft
/'
Item Description
I 1 I Open cylinder roller bearing I
1 2 1 Output shaft with differential drive wheel I
1 3 1lst gear wheel I
1 4 1 1st gear double synchronisation I
151
Synchroniser - I stl2nd gear with reverse
gear
wheel
1 6 12nd gear double synchronisation I
Item Description
1 7 12nd gearwheel I
1 8 13rd gear wheel I
1 9 13rd gear simple synchronisation I
1 10 1 Synchroniser assembly - 3rdl4th gear I
11
12
2006.0 Fiesta 12/2006 G281365en
13 4th gear simple synchronisation
4th gear
wheel
Ball bearing (closed both
sides)
L
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308-03-1 0 Manual Transmission/Transaxle 308-03-1 0
DESCRIPTION AND OPERATION
Differential assembly
Item Description
I 1 1 Bearing I
1 2 1 Crown wheel I
1 3 1 Differential assembly I
4 Sender wheel - Vehicle Speed Sensor
I I (VSS)
The differential assembly is built into the
transmission housing.
The drive torque is transmitted to the differential
by the crown wheel which is bolted to it. The differential
assembly contains differential
pinion gears mounted on a spindle and the axle
halfshaft pinion gears which connect to the front
wheel axle halfshafts through helical gearing.
The axle halfshaft pinion gears can revolve around
the differential pinion gears when the road wheel
speeds are different
(e.g when cornering).
On vehicles without Anti-lock Brake System (ABS)
a VSS detects the speed of the differential
assembly at the VSS sender wheel.
On vehicles with ABS the VSS sender wheel is
also installed. The VSS is however not installed in
this case. A plug with an O-ring closes the
corresponding bore instead.
2006.0 Fiesta la2006 G281365en
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