2003 FORD MUSTANG manual transmission

DESCRIPTION AND OPERATION
Range Selection
The transmission has six range positions: P, R, N, (D), 2 and 1.
Park
In the PARK position:
zthere is no powerflow through the transmission.
z the parking pawl locks the output shaft to the case.
z the engine can be started.
z the ignition key can be removed.
Reverse
In the REVERSE position:
zthe vehicle can be operated in a rearward direction, at a reduced gear ratio.
z engine braking will occur.
Neutral
In the NEUTRAL position:
zthere is no powerflow through the transmission.
z the output shaft is not held and is free to turn.
z the engine can be started.
Overdrive
Overdrive is the normal position for most forward driving.
The OVERDRIVE position provides:
zAutomatic shifts.
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22003 Mustang Workshop Manual
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z
Apply and release of the torque converter clutch.
z Maximum fuel economy during normal operation.
Second Position
This position provides:
zSecond gear start and hold.
z The torque converter clutch can apply and release.
z Improved traction and engine braking on slippery roads.
z Engine braking for descending steep grades.
First Position
If this position is selected at normal road speeds, the transmission will shift into second gear, then into
first when the vehicle reaches a speed below approximately 45 km/h (28 mph).
This position provides:
zFirst gear operation only.
z Engine braking for descending steep grades. Klj . 2 ba
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DESCRIPTION AND OPERATION
Shift Patterns
Upshifts
Transmission upshifting is controlled by the powertrain control module (PCM). The PCM receives
inputs from various engine or vehicle sensors and driver demands to control shift scheduling, shift feel
and torque converter clutch (TCC) operation.
Downshifts
Under certain conditions the transmission will downshift automatically to a lower gear range (without
moving the gearshift lever). There are three categories of automatic downshifts; Coastdown, Torque
Demand and Forced or Kickdown shifts.
Coastdown
The coastdown downshift occurs when the vehicle is coasting down to a stop.
Torque Demand
The torque demand downshift occurs (automatically) during part throttle acceleration when the
demand for torque is greater than the engine can provide at that gear ratio. If applied, the transmission
will disengage the TCC to provide added acceleration.
Kickdown
For maximum acceleration, the driver can force a downshift by pressing the accelerator pedal to the
floor. A forced downshift into a lower gear is possible below calibrated speeds. Specifications for
downshift speeds are subject to variations due to tire size, engine and transmission calibration
requirements.
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12003 Mustang Workshop Manual
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DESCRIPTION AND OPERATION
Disassembled Views
4R70W Automatic Transmission —
Disassembled View
SECTION 307-
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82003 Mustang Workshop Manual
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78 7A233 Seal —
direct clutch piston outer 79 7A153 Gear —
output shaft ring 80 7F283 Cylinder assembly — direct clutch
81 7F274 Seals —
output shaft small — direct clutch (2
req'd) 82 7F240 Bearing and race assembly —
direct clutch outer
No. 8 83 7060 Shaft assembly —
output (model dependent) 84 7F273 Seal —
output to case shaft large (3 req'd) 85 87054-S94 Seal
— O- ring (piloted output shaft only) (model
dependent) 86 7D164 Hub —
output shaft 87 97713-
S Snap ring
— 1-13/16 retaining (retains 7D164 to
7060) 88 7C122 Snap ring —
retaining (retains 7D164 to 7A153) 89 7025 Bushing —
rear case 90 7F242 Bearing and race assembly — case rear No. 9
91 7005 Case assembly
92 7086 Gasket —
extension (model dependent) 93 N803747-
S1101 Bolt —
M8-1.25 x 30 (6- attaches 7A039 to 7005)
(model dependent) 94 7A039 Extension housing assembly (model dependent)
95 — Bushing —
extension housing (part of 7A039) 96 7052 Seal assembly —
extension housing (model
dependent) 97 390318-
S100 Pipe plug —
1/8-27 Dryseal tapered (5 req'd) 98 7F295 Pin —
overdrive band anchor 99 388142-
S Pin —
reverse band anchor (part of 7005) 100 7034 Vent assembly —
case 101 N605771-
S427 Bolt —
M6-1.0 x 14 hex head (attaches output
shaft speed sensor to case) 102 7H103 Sensor assembly —
transmission output shaft
speed 103 N811757-
S100 Seal —
14.0 x 1.78 O- ring (2 req'd) 104 N806933-
S102 Bolt and washer assembly —
M6-1.0 x 25 mm (1
in) (2-attaches 7F293 to 7005) (model dependent) 105 7F293 Sensor —
transmission range 106 7A256 Lever assembly —
manual control (model
dependent) 107 7H296 Link assembly —
manual control (model
dependent) 108 7C493 Shaft —
transmission manual control lever (model
dependent) 109 N808737- Nut —
M10-1.5 (attaches 7A256 to 7C493) Klj . 5 ba
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S427
110 7B498 Seal assembly —
manual control lever 111 373907-S2 Nut —
1/4 spring (retains identification tag to
7000) 112 7B148 Tag —
identification (part of 7005) 113 7D273 Connector assembly —
fluid tube (2 req'd) 114 7N171 Plug —
converter housing access 115 7B210 Pin —
manual lever shaft retainer 116 391131 Seal —
0.426 x 0.070 O- ring 117 N805862-
S Seal —
14.0 x 1.78 O- ring 118 7G383 Solenoid valve —
transmission pressure control 119 7A441 Pawl —
parking pawl 120 7D071 Shaft —
parking pawl 121 7D419 Cup —
park rod guide (part of 7A039) 122 7D070 Spring —
parking pawl return 123 7A232 Rod assembly —
park pawl actuating 124 7A115 Lever assembly —
manual valve detent lever 125 N800287-
S536 Nut —
M14 x 1.5 hex intermediate detent lever
(attaches 7A115 to 7A256) 126 7H188 Piston assembly —
overdrive servo 127 7F201 Spring —
overdrive servo piston 128 7F203 Rod —
overdrive servo actuating (part of 7H188) 129 7H179 Washer —
backup overdrive servo (part of
7H188) 130 7G277 Spring —
overdrive cushion spring (part of
7H188) 131 7F200 Piston assembly —
overdrive servo (part of
7H188) 132 97411-
S Ring —
retaining (part of 7H188) 133 7384 Ring —
2.85 retaining type TVP "H" internal
(retains 7H188 to 7005) 134 7D031 Spring —
reverse band servo piston 135 7D189 Piston assembly —
reverse band servo 136 7D036 Cover assembly —
reverse band servo piston 137 388215-
S100 Retaining ring internal
— 3-13/16 138 7H292 Piston — 2-
3 accumulator (bonded seals) 139 7F285 Spring
— 2-3 shift accumulator piston (model
dependent) 140 7B264 Retainer — 2-
3 shift accumulator spring 141 7F284 Spring
— 1-2 shift accumulator (model
dependent) 142 7F251 Piston — 1-
2 shift accumulator (bonded seals) 143 7F284 Spring
— 1-2 shift accumulator Klj . 6 ba
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144 7G326 Nested spring
— 1-2 (inner spring) (vehicle
dependent) 145 7F247 Cover and seal assembly — 1-
2 accumulator 146 7384 Ring — 2-
1/16 retaining type HU internal (retains
7H300 to 7005) 147 N807178-
S1000 Bolt —
M6-1.0 x 18 hex head (12- attaches
reinforcing plate to valve body) 148 7F282 Plate —
valve body reinforcing (part of 7A100) 149 7C155 Gasket —
valve body separator upper 150 7A008 Plate —
control valve body separator (part of
7A100) 151 7D100 Gasket —
valve body separator lower 152 7D174 Valve —
converter drainback 153 7A091 Body assembly —
main control 154 7H173 Gasket —
valve body cover plate 155 7C034 Plate —
valve body cover (part of 7A100) 156 N807178-
S1000 Bolt —
M6-1.0 x 18 hex head (11- attaches 7C034
to 7A100 (part of 7A100) 157 7A100 Control assembly —
main (model dependent) 158 7A098 Filter and seal assembly —
fluid 159 7A191 Gasket —
transmission pan 160 7A194 Pan — transmission
161 N605785-
S1036 Bolt —
M8-1.25 x 18 hex flange head (14-
attaches 7A194 to 7005) 162 7L027 Magnet —
ceramic case (part of 7A194) 163 N808947-
S1300 Bolt —
M8-1.25 x 46 hex shoulder pilot (2-
attaches 7C034 to 7A100) 164 N807179-
S1000 Bolt —
M6-1.0 x 52 hex flange head (12- attaches
7A100 to 7005) 165 7H111 Retainer — solenoid
166 7E195 Ball —
1/4 diameter coast booster valve shuttle (8
req'd) 167 7H187 Screen —
solenoid pressure supply 168 N800670-
S1000 Bolt —
M6-1.0 x 40 hex flange head (13- attaches
7A100 to 7005) 169 7E332 Spring assembly —
manual valve detent 170 7Z276 Seal —
0.864 x 0.070 O- ring (2 req'd) 171 7G276 Bulkhead assembly — wiring connector
172 7G276 Bulkhead assembly —
connector (molded lead
frame) 173 7Z484 Seal —
6.07 x 1.70 O- ring (2 req'd) 174 7G484 Solenoid valve —
transmission shift 175 7G136 Solenoid valve —
transmission torque converter
clutch 176 N807178-
S1000 Bolt —
M6-1.0 x 16 hex head (retains 7D136 and
7G484 to 7A100) Klj . 7 ba
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DESCRIPTION AND OPERATION
Bushings, Bearing and Thrust Washer Locator
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Item Part
Number Description
1 7D014 Pump No.1 thrust washer (select fit)
2 7A166 Forward clutch No. 2 bearing and race assembly
3 7F231 Forward clutch bearing and race assembly —
front
No. 3 4 7F244 Forward clutch hub bearing and race assembly No.
4
5 7F244 Forward clutch sun gear bearing and race
assembly No. 5
6 7F241 Planet assembly bearing and race No. 6
7 7F243,
7F237 Direct clutch inner bearing, race assembly No. 7
and direct clutch inner bearing support No. 7
8 7F240 Direct clutch outer bearing and race assembly No.
8
9 7F242 Outer bearing and race assembly —
rear No. 9 10 — Extension bushing (part of 7A039)
11 7025 Case bushing
12 7B233 Output shaft bushing
13 7B375 Planet carrier bushing —
rear 14 7F209 Forward clutch sun gear bushing
15 7N193 Reverse clutch sun gear bushing Klj . 1 ba
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