wheel torque FORD MUSTANG 2003 Service Manual

32. Install the torque converter nuts.
33. Install the flywheel inspection cover.
34. Install the driveshaft onto the transmission output shaft, aligning the index-
mark in the six
o'clock position.
35. CAUTION: Use new bolts to install the driveshaft. If new bolts are not available,
apply threadlock to the threads of the original bolts.
CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion
flange pilot. To make sure the yoke seats squarely on the flange, tighten the bolts evenly
in the sequence shown.
NOTE: Align the marks made on the flange and driveshaft during removal.
Position the driveshaft and install the driveshaft- to-pinion flange bolts in the sequence shown. Klj . 10 ba
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DESCRIPTION AND OPERATION
Transmission Description
The 4R70W has the following features:
zWide ratio gears
z Four speeds
z Rear wheel drive
z Automatic
z Electronic shift
z Torque converter clutch control
z Line pressure controls
The transmission uses Ravigneaux- style double-pinion gearset with two bands, one one- way roller
clutch, one mechanical diode and four friction clutches to produce four forward gears and Reverse.
4R70W Automatic Transmission SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Klj . 1 ba
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forces exerted by the clutch pressure plate and the flywheel on the facings. These factors limit
the amount of torque that can be transmitted without slippage.
z The clamping force is obtained from a diaphragm spring contained within the clutch pressure
plate assembly. This force is developed during the attachment of the clutch pressure plate
assembly to the flywheel.
z The clutch system is disengaged when the clutch pedal is pressed and is accomplished when
the release fingers are fully displaced toward the flywheel. This displacement removes the
spring load from the clutch pressure plate and eliminates the coupling friction between the
engine and the transmission.
z When the clutch pedal is depressed a cable connected to the clutch release lever, hub and
bearing actuates the clutch pressure plate diaphragm spring, releasing pressure on the clutch
disc. This eliminates the engagement between the transmission and the engine. Klj . 4 ba
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Release bearing rub will
disappear when the
clutch is engaged. In the
event that a bearing is
damaged, the noise is
more pronounced while
engaged in gear under
load or coast than in
NEUTRAL.
Noisy in forward gears
zComponents
grounding out
on the
transmission. z
CHECK for screws,
bolts, etc., of body or
other components
grounding out.
CORRECT as
necessary.
z Components
housing bolts. z
CHECK the torque on
the transmission-to-
flywheel housing bolts
and the flywheel
housing- to-engine block
bolts. TIGHTEN the
bolts to specification.
REFER to Section 308 -
01 .
z Bearings or
gears. z
INSPECT the bearings.
INSPECT the gears and
gear teeth for wear or
damage. INSTALL new
components as
necessary. REFER to
Section 308 - 01 .
z Gears clash when
shifting from one forward
gear to another z
Pilot bearing. zCHECK for a binding
condition between the
input shaft and the
engine crankshaft pilot
bearing. INSTALL new
components as
necessary. REFER to
Section 308 - 01 .
z Gear teeth
and/or
synchronizer. z
REPAIR or INSTALL
new components as
necessary. REFER to
Section 308 - 03A or
Section 308 - 03B .
z Engine idle
speed too high. z
REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
z Transmission jumps out
of gear z
Transmission
range selector
lever boot. z
INSTALL a new boot if
exceptionally stiff.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Transmission-to-
engine mounting
bolts. z
TIGHTEN the bolts to
specification. Klj . 4 ba
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stopped and the measurement taken at the downstop is the
clutch reserve.
z Is the clutch reserve less than 19 mm (0.75 inch)? Item Pedal Position
1 Gear clash begins
2 Gear clash ends
3 Clutch pedal downstop
F5 INSPECT THE RELEASE LEVER AND PIVOT STUD
z
Remove the transmission.
z Inspect the release lever and the pivot stud for wear,
damage or misalignment.
z Is the release lever or pivot stud worn, damaged or
misaligned? Yes
INSTALL a new release
lever or pivot stud as
necessary. TEST the
system for normal
operation.
No
GO to
F6 .
F6 INSPECT THE RELEASE BEARING
z
Inspect the release bearing for wear or damage. Make sure
the release lever is seated in the release bearing pocket.
z Is the release bearing worn or damaged? Yes
INSTALL a new release
bearing. TEST the system
for normal operation.
No
GO to
F7 .
F7 INSPECT THE PILOT BEARING
z
Inspect the pilot bearing for wear or damage.
z Is the pilot bearing worn or damaged? Yes
INSTALL a new pilot
bearing. TEST the system
for normal operation.
No
GO to
F8 .
F8 INSPECT THE CLUTCH PRESSURE PLATE TO FLYWHEEL
BOLTS z
Measure the clutch pressure plate to flywheel bolts.
z Is the bolt torque greater than or equal to 65 Nm (48 lb-
ft)? Yes
INSTALL a new pressure
plate and clutch disc. Note
the condition of the
removed components
(wear, damage or oil
contamination). For oil Klj . 13 ba
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SPECIFICATIONS
SECTION 308-
01: Clutch 2003 Mustang Workshop Manual General Specifications
Item Specification
Pressure Plate
Pressure plate diameter (3.8L) 280 mm (11.0 in)
Pressure plate diameter 4.6L (2V) 280 mm (11.0 in)
Pressure plate diameter 4.6L (4V) 280 mm (11.0 in)
Clutch Disc
Clutch diameter (3.8L)
280 mm (11.0 in) Number of springs:
5 plain
Color identification:
none Clutch diameter (4.6L 2V)
280 mm (11.0 in) Number of springs:
4 plain
Color identification:
none Clutch diameter (4.6L 4V)
280 mm (11.0 in) Number of springs:
5 plain
Color identification:
no paint daub Fluid and Lubricants
Motorcraft Premium Long-
Life Grease
XG -1-C or equivalent ESA-
M1C75- B
Torque Specifications Description Nm lb-
ft Pressure plate to flywheel bolt (3.8L) 33 24
Pressure plate to flywheel bolts 4.6L (2V) 45 + 60° 33 + 60°
Pressure plate-
to-flywheel bolts 4.6L (4V) 45 + 60° 33 + 60° Klj . 1 ba
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DESCRIPTION AND OPERATION
Clutch
The primary function of the clutch is to couple and uncouple engine power to the transmission upon
driver command. For additional information, refer to
Section 308 - 02 .
z The clutch is a single plate, dry friction clutch disc. The clutch disc has a splined hub (with
integral torsional dampening springs) which attaches the clutch disc to the input shaft.
z Engine output is coupled to the input shaft by the friction existing between the clutch disc
facings and the flywheel/clutch pressure plate assembly. The extent of this friction is directly
related to the composition of the facing material and the magnitude of the clamping force
exerted by the clutch pressure plate. These factors limit the amount of torque that can be
transmitted without slippage.
z The clamping force is obtained from a diaphragm spring contained within the clutch pressure
plate assembly. This force is developed during the attachment of the clutch pressure plate to
the flywheel.
z The clutch system is disengaged when the clutch pedal is depressed and engaged when the
clutch pedal is released. This displacement removes the spring load from the clutch pressure
plate and eliminates the coupling friction between the engine and the transmission.
z When the clutch pedal is depressed, a cable connected to the clutch release lever, hub and
bearing actuates the clutch pressure plate diaphragm spring, releasing pressure on the clutch
disc. This eliminates the engagement between the transmission and the engine.
SECTION 308-
01: Clutch 2003 Mustang Workshop Manual Klj . 1 ba
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SIR Coil Assembly (Clockspring)Air Bag Restraint System
Slip Ring (Clockspring)Air Bag Restraint System; Steering Column Switches
SRS Control ModuleAir Bag Restraint System
Starter MotorStarters
Starter Interrupt RelayStarters
Starter SolenoidStarters
Starter RelayStarters
Steering Wheel Position SensorAnti-Lock Brakes
StoplightsExterior Lights
Stoplight SwitchEngine Performance; Cruise Control Systems;
Anti-Lock Brakes
Sun Roof ECUPower Sun Roof
Sun Roof MotorPower Sun Roof
Sun Roof Position SensorPower Sun Roof
TaillightsExterior Lights
Throttle Position (TP) SensorEngine Performance
Torque Converter Clutch Solenoid/SwitchEngine Performance
Traction Control SwitchAnti-Lock Brakes
Trailer Tow ConnectorExterior Lights
Trailer Tow RelayExterior Lights
Transmission/TransaxleEngine Performance
Transmission Control Module (TCM)Engine Performance; Starters
Transmission Range SensorStarters; Back-Up Lights; Engine Performance
Transmission Range SwitchBack-Up Lights; Engine Performance; Anti-Theft
System
Turn Signal FlasherExterior Lights
Turn Signal LightsExterior Lights
Twilight Sentinel SwitchHeadlight Systems; Daytime Running Lights
Vapor Canister Le ak Detection PumpEngine Performance
Vehicle Control Module (VCM)Engine Performance
Vehicle Dynamic ModuleElectronic Suspension
Vehicle Speed Control ServoCruise Control Systems
Vehicle Speed SensorData Link Connectors; Analog Instrument Panels;
Cruise Control Systems; Electronic Suspension
Voltage RegulatorGenerators & Regulators
Water-In-Fuel SensorEngine Performance; Analog Instrument Panels
Wheel Speed SensorsAnti-Lock Brakes
Window Timer ModulePower Convertible Top
Windshield Intermittent Wiper RelayWiper/Washer Systems
Windshield Washer MotorWiper/Washer Systems
Wiper MotorWiper/Washer Systems

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