MITSUBISHI ECLIPSE 1991 Service Manual

AUTOMATIC TRANSAXLE - General Information21437
AUTOMATIC TRANSAXLE
_,sGENERAL INFORMATION
NZlBABTaCautionary points during disassembly and
assembly of the transaxle
Because the automatic transaxle is composed ofcomponent parts of an especially high degree of
precision, these parts should be very carefully
handled during disassembly and assembly so asnot to scar or scratch them.
A rubber mat should be placed on the work-
bench, and it should always be kept clean.
During disassembly, cloth gloves or shop towelsshould not be used.
If such items must be used, use articles made ofnylon, or use paper towels.
All
disassemblyed parts must be thoroughly
cleaned.Metal parts may be cleaned with ordinary
detergents, but must be thoroughly air dried.
Clean the clutch disc, resin thrust plate and
rubber parts by using ATF (automatic transmis-
sion fluid), being very careful that dust, dirt, etc.
do not adhere.
Do not reuse gaskets, oil seals and rubber parts.Replace them with new ones at every reassem-
bly. O-ring of oil level gauge need not be
replaced.Do not use grease other than petrolatum jelly.
Apply ATF to friction element, rotating parts, andsliding parts before installation.
New clutch disc should be immersed in ATF for
more than two hours before installation.
Do not apply sealer or adhesive to gaskets.
When bushing must be replaced, replace
assembly which includes it.
If the transaxle main unit is damaged, also
disassembly and clean the cooler system.
In order to prevent a sudden start as a result of
accidental misoperation of the select lever, this
model is provided with the automatic-transaxle
safety-lock system.

21-138AUTOMATIC TRANSAXLE - General Information
<F4A22>Torque converter
DifferentialPulse generator A
Transfer idler gear
Transfer driven gear
nerator
B
TFAO480

AUTOMATIC TRANSAXLE - General Information
<F4A33>
Torqueconverter -werseTransfer
idler gear
Planetarygear set
!v/n
ke
Transferdrive gear
Transfek shaft
. Differential
End- clutch
TFAOl 01

21-140AUTOMATIC TRANSAXLE - General Information:W4A33>
Torqueconverter
Rear output
shaft
Transfer\
TransferKickdown
bandOil pump
Rear
\FrontIclutch
clutchI
:h
Frontoutput shaft
2%
--/Differential
A
-’
TFA0102

AUTOMATIC TRANSAXLE - General Information21-141
<F4A22 - Neutral>ExFront clutchRear clutchLow-reverse
brake
Kickdown servo
End clutch
control solenoid
valve
To lubrvzatlon
(front)
-To lubrlcatlon +=(rear)
Shift control
valve
~~&-----~ Manual 1
( “,::mr JL-
mLine pressure
0Torque converter and lubncatlonpMSS”V2
= Reducing pressure
1 011 pump suction pressure
n Modulated line pressure
0 Damper clutch pressure
lmDamper clutch control solenoidvalve pressure
IPressure control solenoidvalve pressure
TFA0070

21-142AUTOMATIC TRANSAXLE - General Information
<WA22- Parking>
Klckdown servo
-,Low-reverse
brake
End clutch
Front clutch
FDamper clutch
control valve
Damper clutch
control
solenordTo lubrication
+_ifront)To lubncatlon CJIrear)
I I .“‘---Shaft control
114 !!. B ii IIII III/lII II.
TlPressure control
Pressure
\ \, Yal”eEm
0 011 pump suctton pressure
0 Modulated line pressure
m Damper clutch pressure
Damper clutch control
solenoidvalve pressure
-IPressure control solenoidvalve pressure
ILine pressure
xque converter and lubrlcatlonessure
Reducing pressure
TFA0071

AUTOMATIC TRANSAXLE - General Information21-143
<F4A22- Drive-Stopping >
Toraue converter
c
Kickdown servo
-r
LOFF
ExDamper clutch
control solenoid
valve
To
lubrlcatlon c(front)
To
lubrlcatlon c(rear)Front
clutc/End clutch
Pressure
011 pan
= Line pressure
mTorque converter ana lubr!catlonpressure
m Reducing pressure
1 011 pump suction pressure
Modulated
lane pressure
L-IPressure control solenoidvalve pressure
m Damper clutch pressure
Damper clutch control
solenoidvalve pressure
) Drive (Stopping) (
TFA024 2

21-144AUTOMATIC TRANSAXLE - General Information(F4A22
-Drive-First>Low reverseL.-J
^
Klckdawn servoTorn!w converter
Front clutch
F12End clutch
w$=control val
exhaust valve OFF
REnDamper clutch
control
solenovalve
To
lubncatlon(front)cTo
lubrlcatlon c=(rear)
/N-D control
valve
m Line pressure0 011 pump suction pressureamper clutch pressure
‘vque converter and lubncatlonessure
, .Lduclngpressure
0 Modulated line pressure
IPressure control solenoid
valve pressure
uamper clutch control solenoidvalve pressure
Drive (First)
TFA0072

AUTOMATIC TRANSAXLE - General Information21-145
<F4A22 -Drive-Second>Torque converter
Klckdown servo
Low reverse
brake
Front clutch
Rear clutch
End clutch
+Damper cluF:h
control
solenoidvalve
(front)
5%To lubrication cTo
lubrlcatlon cz(rear)
N-D control
valve
I,,--.- -InPressure controlI valve
Ahii
Pressure
1 Line relief
e
i ; valve
EX
011 pan
= Line pressure
0Torque converter and lubrlcatlonpressure
mRedumg pressure
011 pump suction pressure
Modulated
lane pressure
Pressure control
solenoidvalve pressure
mlDamper clutch pressure
Damper clutch control
solenoid1valve pressure
1 Drive (Second) 1
TFA0073

21-146AUTOMATIC TRANSAXLE - General Information
cF4A22 -Drive-Third>
Torque converter
Klckdown servo
-,tnd clutch
I@4Damper
clut?control solenordvalve
To
lubrication(front) cTo lubncatlon cLI(rear)exhaust
valve
”valve-&len;valve “Al” H i I9 11
+IIShift control Exsolenordvalve “B”
m Line pressure
-Torque converter and lubricatronjressure
,ledwng pressureclutch
0 011 pump suctron pressure
n Modulated line pressure
7Pressure control solenoidvalve pressure
m Damper clutch pressure
Damper clutch control
solenordvalve pressure
TFA0074