LEXUS SC400 1991 Service Repair Manual

PARK/NEUTRAL POSITION (PNP)
SWITCH
PARK/NEUTRAL POSITION SWITCH
REPLACEMENT
AT073±04
1. REMOVE FRONT EXHAUST PIPE(See pages EG±204)
2. DISCONNECT PARK/NEUTRAL POSITION SWITCH CONNECTOR
3. REMOVE PARK/NEUTRAL POSITION SWITCH
(a) Remove the control shaft lever.
(b) Pry off the lock washer and remove the nut.
(c) Remove the bolt and pull out the park/neutral position switch.
4. INSPECT PARK/NEUTRAL POSITION SWITCH
(See page AT±106)
5. INSTALL AND ADJUST PARK/NEUTRAL POSITION SWITCH
(See page AT±49)
6. CONNECT PARK/NEUTRAL POSITION SWITCH
CONNECTOR
7. INSTALL FRONT EXHAUST PIPE (See page EG±204)
KICK±DOWN SWITCH
KICK±DOWN SWITCH REPLACEMENT
AT074±04
1. REMOVAL OF KICK±DOWN SWITCH
(a) Remove the 3 bolts and kick±down switch.
(b) Disconnect the kick±down switch connector.
2. INSTALLATION OF KICK±DOWN SWITCH
(a) Connect the kick±down switch connector.
(b) Install the kick±down switch and 3 bolts.
AT±18
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION KICK±DOWN SWITCH
WhereEverybodyKnowsYourName

VALVE BODY
VALVE BODY REMOVAL
AT0GG±02
1. DRAIN ATF
2. REMOVE FRONT EXHAUST PIPE(See pages EG±204)
3. REMOVE OIL PAN
(a) Remove the 19 bolts.
(b) Install the blade of SST between the transmission case and oil pan, cut off applied sealer.
SST 09032±00100
NOTICE: Be careful not to damage the oil pan flange.
4. EXAMINE PARTICLES IN PANRemove the magnets and use them to collect steel particles.
Carefully look at the foreign matter and particles in the pan
and on the magnets to anticipate the type of wear you will find
in the transmission:
Steel (magnetic) 0 bearing, gear and clutch plate wear
Brass (non±magnetic) 0 bushing wear
5. REMOVE OIL STRAINER Remove the 3 bolts holding the oil strainer to the valve body.
6. REMOVE SOLENOID WIRING
(a) Remove the 2 bolts and the clamp.
(b) Disconnect the 4 connectors from the solenoid valves.
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION VALVE BODYAT±19
WhereEverybodyKnowsYourName

7. REMOVE 4 SOLENOID VALVES
(a) Remove the No. 1 and No.2 solenoid valves.
(b) Remove the O±rings from the No. 1 and No.2 solenoidvalves.
(c) Remove the lock plate and No.3 and No.4 solenoid valves.
8. REMOVE THROTTLE CABLE Disconnect the throttle cable from the cam.
9. REMOVE VALVE BODY
(a) Remove the 20 bolts.
(b) Remove the valve body.
NOTICE: Do not drop the check ball body and spring.
10. INSPECT VALVE BODY Refer to `94 A340E and A341E Automatic Transmission Re-
pair Manual (for LEXUS SC400)
AT±20
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION VALVE BODY
WhereEverybodyKnowsYourName

VALVE BODY INSTALLATION
AT0GH±02
1. INSTALL 4 SOLENOID VALVES
2. INSTALL CHECK BALL BODY AND SPRING AND HOLDIT
3. INSTALL VALVE BODY
(a) Align the groove of the manual valve to the pin of the lever.
(b) Install the 20 bolts and clamp.
Torque: 10 N Vm (100 kgf Vcm, 7 ft Vlbf)
(c) Connect the throttle cable to the cam.
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION VALVE BODYAT±21
WhereEverybodyKnowsYourName

4. CONNECT SOLENOID VALVE CONNECTORS
5. INSTALL OIL STRAINER AND GASKETSInstall the oil strainer and torque the 3 bolts.
Torque: 10 N Vm (100 kgf Vcm, 7 ft Vlbf)
6. INSTALL OIL PAN
(a) Install the 4 magnets in the indentations of the oil pan, as
shown in the illustration.
(b) Remove any FIPG material and be careful not to drop oil on the contacting surfaces of the transmission case and oil pan.
(c) Apply FIPG to the oil pan, as shown in the illustration.
FIPG:
Part No. 08826±00090, THREE BOND 1281 or equivalent
(d) Install the oil pan to the transmission case and torque the 19bolts.
Torque: 7.4 N Vm (75 kgf Vcm, 65 in. Vlbf)
7. INSTALL FRONT EXHAUST PIPE
(See page EG±204)
8. CHECK FLUID LEVEL
AT±22
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION VALVE BODY
WhereEverybodyKnowsYourName

ASSEMBLY REMOVAL AND INSTALLATION
AT0GJ±02
Remove and install the parts, as shown.
NOTICE: Work must be started after 90 seconds from the time the ignition switch i\
s turned to the ªLOCKº
position and the negative (±) terminal cable is disconnected from t\
he battery.
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATIONAT±23
WhereEverybodyKnowsYourName

NOTICE: Before removing of transmission, disconnect the throttle cable from the\
following parts in the en-
gine compartment order.A: Throttle lever
B: Throttle cable bracket
C: Clamp
D: Clamp
E: Clamp
AT±24±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION
WhereEverybodyKnowsYourName

TORQUE CONVERTER CLUTCH
CLEANING
AT079±04
If the transmission is contaminated, the torque converter
clutch and transmission cooler should be thoroughly flushed
with ATF.
TORQUE CONVERTER CLUTCH AND
DRIVE PLATE INSPECTION
AT00J±01
1. INSPECT ONE±WAY CLUTCH
(a) Install SST so that it fits in the notch of the converter hub and
outer race of the one±way clutch.
SST 09350±30020 (09350±32020)
(b) Press on the serrations of starter with a finger and rotate it. Check if it rotates smoothly when turned clockwise and locks
up when turned counterclockwise.
2. MEASURE DRIVE PLATE RUNOUT AND INSPECT RING GEAR
Set up a dial indicator and measure the drive plate runout.
If runout exceeds 0.20 mm (0.0079 in.) or if the ring gear is
damaged, replace the drive plate. If installing a new drive
plate, note the orientation of spacers and tighten the bolts.
Torque: 98 N Vm (1,000 kgf Vcm, 72 ft Vlbf)
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATIONAT±25
WhereEverybodyKnowsYourName

INSTALLATION MAIN POINTS
AT00L±01
1. CHECK TORQUE CONVERTER CLUTCH INSTALLATIONUsing calipers and a straight edge, measure from the
installed surface of the torque converter clutch to the front
surface of the transmission housing.
Correct distance:
17.1 mm (0.673 in.)
If the distance is less than the standard, check for an improp-
er installation.
2. LIFT ENGINE FRONT SIDE
3. INSTALL THROTTLE CABLE
4. ADJUST THROTTLE CABLE (See page AT±48)
5. FILL TRANSMISSION WITH ATF AND CHECK FLUID LEVEL
(See page AT±47)
NOTICE: Do not overfill.
Fluid type:
ATF Type T±II or equivalent
6. INSTALL PROPELLER SHAFT(See page PR±12 to PR±14 )
7. INSTALL EXHAUST PIPE
(See page EG±204)
AT±26
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION
WhereEverybodyKnowsYourName

SHIFT LOCK SYSTEM
COMPONENT AND CIRCUIT
AT0GL±02
±
A304E (1UZ±FE) AUTOMATIC TRANSMISSION SHIFT LOCK SYSTEMAT±27
WhereEverybodyKnowsYourName