307-01-1 Automatic Transaxle/Transmission 307-01-1
DESCRIPTION AND OPERATION
Transaxle Description The manual selector lever gives the driver a choice
of P, R, N, 1, 2 and D.
The automatic transmission used in the vehicle is a
new development. In drive range D it is also possible to operate an
overdrive (O/D) switch on the manual selector lever
It is a fully automatic, electronically controlled
to prevent the transmission from shifting into 4th
4-speed transmission designed for front-wheel drive
gear. The default gear for this transmission is 3rd
vehicles.
gear.
Its abbreviated designation 4F27E means:
To minimize fuel consumption, the torque converter
4 4-speed transmission lock-up clutch is closed by the powertrain control
F front-wheel drive module (PCM) in 3rd and 4th gears depending on
the throttle position and vehicle speed.
27 originally designed for maximum input
torque after torque converter: 365 Nm (270 lb-ft) The transmission has electronic synchronous shift
control (ESSC), which guarantees extremely smooth
E fully electronically controlled gear shifting over the entire life of the transmission.
A hydraulic emergency operating program maintains
limited operation in the event of failure of important
electrical components.
The transmission can be tested using a scan tool
through the data link connector (DLC) in the
passenger compartment.
Gear Ratio (Typical shown, ratios are model
dependent)
1st 2.816:1
2nd 1.498:1
3rd 1.000:1
4th 0.726:1
Reverse 2.649:1
The individual ratios are achieved through 2
planetary gear sets, connected one behind the other.
The individual components of the planetary gear
sets are driven or held by means of 3 multi-plate
clutches, a multi-plate brake, a brake band and a
roller one-way clutch.
The torque is transmitted to the final drive assembly
through an intermediate gear stage.
Copyright 2006, Ford Motor Company
Last updated: 05/05/2006 2007 Focus, 6/2006
307-01-2 Automatic Transaxle/Transmission 307-01-2
DESCRIPTION AND OPERATION (Continued)
Valve Body
Item Part Number Description The shift solenoid (on/off) valves switch the
1 7G484 Pulse width modulation hydraulic path to the clutches and bands, reducing
(PWM) solenoid valves the number of required modulating valves.
2 7H148 Shift solenoid (on/off) valves The main regulating valve (variable force solenoid)
3 7G353 Main regulating valve makes sure that sufficient hydraulic pressure is
variable force solenoid (VFS) available in all operating conditions.
The valve body contains 6 solenoid valves: PWM Solenoid Valves 1-3
three pulse width modulation (PWM) solenoid PWM solenoid valves 1, 2 and 3 control the
valves, pressure to the bands and clutches.
two shift solenoid (on/off) valves, Shift Solenoid (On/Off) Valves 1 and 2
one main regulating valve (variable force The shift solenoid (on/off) valves switch the
solenoid). different oil passages in the valve body to direct the
The individual clutches and bands are supplied pressure to the individual clutches and bands.
pressure from the PWM solenoid valves and the The use of the shift solenoid valves are needed for
shift solenoid (on/off) valves and thus the gears are direct actuation of the individual clutches and bands.
shifted.
Main Regulating Valve
The PWM solenoid valves allow direct actuation of
the clutches and bands to make sure extremely The main regulating valve (variable force solenoid)
smooth gear shifting through precise pressure controls the required main line pressure for the
regulation. individual transmission ranges.
2007 Focus, 6/2006
307-01-3 Automatic Transaxle/Transmission 307-01-3
DESCRIPTION AND OPERATION (Continued)
The main line pressure is controlled dependent on
the current engine load.
Internal Shift Mechanism
Item Part Number Description The shift lever is secured on a square on the manual
1 7A256 Lever on manual shaft shaft. Axial movement of the selector lever cable is
changed into rotation of the manual shaft.
2 7C493 Manual shaft
3 Parking pawl engaging lever In the transmission, the manual shaft operates the
parking pawl engaging lever and the actuating lever
4 7E160 Lever and bracket control
assembly of the manual valve.
5 Manual valve (in valve body
which is not shown)
2007 Focus, 6/2006
307-01-4 Automatic Transaxle/Transmission 307-01-4
DESCRIPTION AND OPERATION (Continued)
The manual valve, a valve operated entirely The manual valve guarantees the functions during
manually, is moved by means of the manual valve hydraulic emergency operation.
actuating lever in the valve body.
External Shift Mechanism
Item Part Number Description Item Part Number Description
1 Selector lever assembly 5 Clip
2 Selector lever 6 Lever on shift shaft
3 Selector lever cable The transmission end of the manual selector lever
4 Lead-through cable is attached to a ball on the lever on the
(Continued) manual shaft.
2007 Focus, 6/2006
307-01-5 Automatic Transaxle/Transmission 307-01-5
DESCRIPTION AND OPERATION (Continued)
The cable abutments are secured to the transmission Item Part Number Description
housing, and then to the bracket of the manual 3 Transfer shaft output gear
selector lever.
4 Differential
The adjuster for the manual selector lever cable is
located at the transmission side of the sheath. The final drive input gear is splined to the planet
carrier of the front planetary gear set and drives the
At the manual selector lever end the cable is clipped
transfer shaft input gear of the intermediate gear
onto a ball.
stage.
Intermediate Gear Stage and Final Drive The transfer shaft output gear of the intermediate
Assembly gear stage drives the final drive assembly.
The torque is transmitted to the halfshafts through
the final drive assembly.
The differential offsets differences in speed of
rotation of the halfshafts.
The intermediate gear stage is designed so that the
final drive ratio can be adapted to requirements
when the automatic transmission is used in
conjunction with different engines.
Item Part Number Description
1 Final drive input gear
2 Transfer shaft input gear
(Continued)
2007 Focus, 6/2006
