Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Mitsubishi Eclipse & Spyder 2000-2006 Approved Mitsubishi Eclipse & Spyder 2000-2002 23A
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23-1
GROUP 23
AUTOMATIC
TRANSAXLE
CONTENTS
AUTOMATIC TRANSAXLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A
AUTOMATIC TRANSAXLE OVERHAUL . . . . . . . . . . . . . . . . . . 23B
23A-2
GROUP 23A
AUTOMATIC
TRANSAXLE
CONTENTS
GENERAL DESCRIPTION. . . . . . . . . 23A-4 A/T KEY INTERLOCK AND SHIFT LOCK
MECHANISMS DIAGNOSTIC
TROUBLE SHOOTING STRATEGY . . . . . . 23A-327
AUTOMATIC TRANSAXLE
SYMPTOM CHART . . . . . . . . . . . . . . . . . . . 23A-328
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . 23A-14
SYMPTOM PROCEDURES . . . . . . . . . . . . 23A-328
DIAGNOSTIC TROUBLESHOOTING
FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-14
INTRODUCTION TO A/T DIAGNOSIS . . . . 23A-14 SPECIAL TOOLS . . . . . . . . . . . . . . . . 23A-331
A/T DIAGNOSTIC TROUBLESHOOTING
STRATEGY. . . . . . . . . . . . . . . . . . . . . . . . . 23A-14 ON-VEHICLE SERVICE . . . . . . . . . . . 23A-332
A/T DIAGNOSTIC TROUBLE CODE A/T CONTROL COMPONENT LAYOUT. . . 23A-332
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . 23A-15 ESSENTIAL SERVICE . . . . . . . . . . . . . . . . 23A-335
FAIL-SAFE/BACKUP FUNCTION. . . . . . . . 23A-18 A/T FLUID CHECK . . . . . . . . . . . . . . . . . . . 23A-335
ROAD TEST . . . . . . . . . . . . . . . . . . . . . . . . 23A-20 A/T FLUID REPLACEMENT . . . . . . . . . . . . 23A-336
TORQUE CONVERTER STALL TEST . . . . 23A-29 FLUSHING COOLERS AND TUBES . . . . . 23A-338
HYDRAULIC PRESSURE TESTS . . . . . . . 23A-30 OIL COOLER FLOW CHECK . . . . . . . . . . . 23A-339
HYDRAULIC CIRCUIT . . . . . . . . . . . . . . . . 23A-36 THROTTLE POSITION SENSOR
LINE PRESSURE ADJUSTMENT . . . . . . . 23A-45 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 23A-339
DIAGNOSTIC TROUBLE CODE CHART . . 23A-45 PARK/NEUTRAL POSITION SWITCH
CONTINUITY CHECK . . . . . . . . . . . . . . . . . 23A-340
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 23A-46
PARK/NEUTRAL POSITION SWITCH AND
DIAGNOSTIC TROUBLE CODE
CONTROL CABLE ADJUSTMENT . . . . . . . 23A-340
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . 23A-47
AUTOMATIC TRANSAXLE CONTROL
DATA LIST REFERENCE TABLE . . . . . . . 23A-317
COMPONENT CHECK . . . . . . . . . . . . . . . . 23A-341
ACTUATOR TEST REFERENCE TABLE. . 23A-322
CRANKSHAFT POSITION SENSOR
INVECS-II CANCEL COMMAND . . . . . . . . 23A-323 CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-341
PCM TERMINAL VOLTAGE REFERENCE THROTTLE POSITION SENSOR CHECK . 23A-341
CHART FOR TRANSAXLE OPERATION. . 23A-323
A/T FLUID TEMPERATURE SENSOR
PCM TERMINAL RESISTANCE AND CONTINUITY CHECK . . . . . . . . . . . . . . . . . 23A-342
CONTINUITY INSPECTION CHART . . . . . 23A-326
PARK/NEUTRAL POSITION SWITCH
INSPECTION PROCEDURE USING AN CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-342
OSCILLOSCOPE . . . . . . . . . . . . . . . . . . . . 23A-326
STOP LIGHT SWITCH CHECK . . . . . . . . . 23A-342
VEHICLE SPEED SENSOR CHECK . . . . . 23A-342
A/T FAULTY OPERATION PREVENTION
PRESSURE SWITCH CHECK . . . . . . . . . . 23A-342
MECHANISM DIAGNOSIS . . . . . . . . 23A-327
SELECT SWITCH CHECK . . . . . . . . . . . . . 23A-342
INTRODUCTION TO A/T KEY INTERLOCK
AND SHIFT LOCK MECHANISMS . . . . . . . 23A-327 SHIFT SWITCH (UP) CHECK . . . . . . . . . . . 23A-342
23A-3
SHIFT SWITCH (DOWN) CHECK . . . . . . . 23A-342 A/T KEY INTERLOCK AND SHIFT LOCK
A/T CONTROL RELAY CHECK . . . . . . . . . 23A-343 MECHANISMS . . . . . . . . . . . . . . . . . . 23A-351
SOLENOID VALVE CHECK . . . . . . . . . . . . 23A-343 REMOVAL AND INSTALLATION . . . . . . . . 23A-351
SELECTOR LEVER OPERATION CHECK 23A-344 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 23A-352
KEY INTERLOCK MECHANISM CHECK. . 23A-344
SHIFT LOCK MECHANISM CHECK . . . . . 23A-345 TRANSAXLE ASSEMBLY . . . . . . . . . 23A-353
REMOVAL AND INSTALLATION . . . . . . . . 23A-353
TRANSAXLE CONTROL . . . . . . . . . . 23A-346
REMOVAL AND INSTALLATION . . . . . . . . 23A-346 SPECIFICATIONS . . . . . . . . . . . . . . . 23A-359
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 23A-348 FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 23A-359
SERVICE SPECIFICATIONS . . . . . . . . . . . 23A-360
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . 23A-360
23A-4 AUTOMATIC TRANSAXLE
GENERAL DESCRIPTION
.
G EN ER AL DESC RIPTIO N
M1231000100076
The A/T come in two models, namely, F4A42 and
F4A51.
ITEMS SPECIFICATIONS
Transaxle model F4A42 F4A51
Engine model 4G64 (2.4L Engine) 6G72 (3.0L Engine)
Torque converter Type 3-element, 1-stage, 2-phase
Torque converter clutch Provided (3rd to 4th)
Stall torque ratio 1.85 2.04
Transaxle type 4-speed forward, 1-speed reverse fully automatic
Gear ratio 1st 2.842 2.842
2nd 1.529 1.495
3rd 1.000 1.000
4th 0.712 0.731
Reverse 2.480 2.720
Final gear ratio (Differential gear ratio) 4.042 3.735
Number of underdrive clutch discs 4
Number of overdrive clutch discs 4
Number of reverse clutch discs 2
Number of low-reverse brake discs 6
Number of second brake discs 3 4
Manual control type P-R-N-D-3-2-L (7 positions) or P-R-N-D (4 positions) +
sport mode (up, down)
Shift pattern control Electronic control (INVECS-II)
Oil pressure control during shifting Electronic control (each oil pressure independently
controlled)
Torque converter clutch control Electronic control
Speedometer gear ratio 29/36 28/36
TRANSAXLE
The transaxle is configured of the torque converter and gear train. A 3-element, 1-step, 2-phase torque
converter with built-in torque converter clutch is incorporated. The gear train is configured of three sets of
multi-plate clutches, two sets of multi-plate brakes, one set of one-way clutches and two sets of planetary
gears configured of the sun gears, carriers, pinion gears and annulus gears.
TSB Revision
AUTOMATIC TRANSAXLE 23A-5
GENERAL DESCRIPTION
TRANSAXLE CONFIGURATION DRAWING
REV OWC
2ND LR UD
OD
AC001813 AB
COMPONENTS AND FUNCTIONS
COMPONENT FUNCTION
Underdrive clutch UD connects the input shaft to the underdrive sun gear.
Reverse clutch REV connects the input shaft to the reverse sun gear.
Overdrive clutch OD connects the input shaft to the overdrive planetary carrier.
Low-reverse brake LR holds the low-reverse annulus gear and the overdrive planetary
carrier.
Second brake 2ND holds the reverse sun gear.
One-way clutch OWC restricts the rotation direction of the low-reverse annulus gear.
FUNCTION ELEMENT TABLE
OPERATING ELEMENT ENGINE START PARKING UNDERDRIVE REVERSE OVER-DRIVE LOW-REVERSE SECOND
MECHANISM CLUTCH (UD) CLUTCH (REV) CLUTCH (OD) BRAKE (LR) BRAKE (2ND)
SELECTOR LEVER POSITION
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