automatic transmission LEXUS GS400 2000 Service User Guide

D01078
D01080
D01082
D01083
D01084
AT±20
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
1968 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
14. REMOVE SHIFT LOCK CONTROL UNIT ASSEMBLY
(a) Remove the shift lock control unit assembly from the shift
lever plate.
(b) Push the shift lock solenoid link lightly, turn and remove
it.
(c) Remove the compression spring.
(d) Remove the slotted spring pin and separate the shift lock
solenoid link.
15. REMOVE SHIFT LEVER SUB±ASSEMBLY
(a) Using a pin punch and hammer, drive out the pin.
(b) Remove the shift lever sub±assembly.
(c) Remove the shift lever nut from the shift lever sub±as-
sembly.
16. REMOVE CONTROL LEVER, SPACER AND CON-
TROL SHAFT
(a) Remove the nut.
(b) Remove the 2 spacers and control shaft from the shift le-
ver plate.
(c) Disconnect the shift lever boot from shift lever plate.
(d) Remove the control lever.

D01085
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
AT±21
1969 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
17. REMOVE CLIP, CONNECTING ROD SWIVEL, LOWER
CONTROL SHAFT BUSHING, LOWER CONTROL
SHAFT PIECE, PLATE WASHER AND SHIFT LEVER
BOOT FROM CONTROL LEVER
(a) Using pliers, remove the clip.
(b) Remove the connecting rod swivel, lower control shaft
bushing, lower control shaft piece, 2 plate washers and
shift lever boot from the control lever.

AT05W±01
D01264
O/D Brake (B0)
O/D One±way
Clutch (F
0) 3rd Coast Brake (B
1)
Direct Clutch (C
2)
Forward Clutch (C
1)
No.1 One±way Clutch (F
1)
2nd Brake (B
3)
1st & Reverse Brake (B
4)
No.2 One±way Clutch (F
2) 3rd Brake (B
2) O/D Direct Clutch (C
0)
Shift Solenoid Valve No.4Shift Solenoid Valve No.3Shift Solenoid Valve No.1 Shift Solenoid Valve No.2
Shift Solenoid Valve SLT
Shift Solenoid Valve SLU
Shift Solenoid Valve SLN
Park
Reverse
Neutral
1st
2nd
4th
5th
1st
4th
1st
3rd
1st
1stS1 S2 S3 C
0C1C2B0B1B2B3B4F0F1F2
: Operating
Gear
Position Shift Lever
Position
ONOFF
ON ON
ON ON
ON ON ON ON
ON
ON
OFF OFF OFF
OFF
OFF OFF
OFF
OFF
OFF OFF
OFFON
ON ON OFF OFF
ON
ONOFF OFF
ON OFF
OFF OFF OFF ON
OFF OFF
OFF ON 2nd
2nd
2nd3rd 3rd
S4
ON OFF ON
OFF ON ON
ON OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF R
N
D
4
3
2
L P
OFFON
OFF
OFFON
OFFOFF
OFF
AT±2
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION SYSTEM
1950 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OPERATION

AT065±01
D01085
D01084
Lip
D01083
D01082
AT±22
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
1970 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
HINT:
Before reassembly, apply MP grease to the parts indicated by
arrows.
(See page AT±13)
1. INSTALL CLIP, CONNECTING ROD SWIVEL, LOWER
CONTROL SHAFT BUSHING, LOWER CONTROL
SHAFT PIECE, PLATE WASHER AND SHIFT LEVER
BOOT TO CONTROL LEVER
(a) Install the shift lever boot, 2 plate washers, lower control
shaft piece, lower control shaft bushing and connecting
rod swivel to the control lever.
(b) Using pliers, install the clip.
2. INSTALL CONTROL LEVER, SPACER AND CONTROL
SHAFT
(a) Connect the shift lever boot to the shift lever plate.
HINT:
Pull out the 3 lips of the shift lever boot securely, as shown in
the illustration.
(b) Install the control shaft and 2 spacers.
(c) Install and torque the nut.
Torque: 13 N´m (128 kgf´cm, 9 ft´lbf)
3. INSTALL SHIFT LEVER SUB±ASSEMBLY
(a) Install a new shift lever nut to the shift lever sub±assem-
bly.
HINT:
Insert the shift lever nut securely until it fits and check there is
no looseness.

D01081
D01079
D01922
D01076
D01075
Install
Lower
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
AT±23
1971 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the shift lever sub±assembly.
(c) Using a pin punch and hammer, drive in the pin.
4. INSTALL SHIFT LOCK CONTROL UNIT ASSEMBLY
(a) Connect the shift lock solenoid link and install a new
slotted spring pin.
(b) Install the compression spring to the shift lock solenoid
link.
(c) Push and install the shift lock solenoid link with the com-
pression spring to the shift lock control unit assembly.
(d) Install the shift lock control unit assembly.
HINT:
Do not torque the shift lock control unit assembly set screws.
5. INSTALL SHIFT LOCK PLATE STOPPER
(a) Install the shift lever anti±rattle cushion and shift lock
plate stopper cap to the stopper.
(b) Install the stopper to the shift lever plate.
HINT:

Check that the claw of the shift lock plate stopper firmly
fits in and slides smoothly.

Insert and connect the projection of the shift lock plate
stopper into the square hole of the shift lock control unit
assembly.
6. INSTALL NO.1 SHIFT LOCK SWITCH PLATE
(a) Install the shift lever anti±rattle cushion to the roller.
(b) Install the roller and shift lever anti±rattle cushion to the
plate.
(c) Install the No.1 shift lock switch plate in the direction
shown in the illustration and lower to the direction shown
by an arrow.
HINT:
Connect the groove of the No.1 shift lock switch plate to the pro-
jection of the shift lock control unit assembly.

D01073
D01072
D01071
D01069
D01068
AT±24
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
1972 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
7. INSTALL AND TORQUE 2 SHIFT LOCK CONTROL
UNIT ASSEMBLY SET SCREWS
Torque: 2.0 N´m (20 kgf´cm, 17 in.´lbf)
8. INSTALL SPRING HOLDER AND SHIFT LEVER TOR-
SION SPRING
(a) Install the shift lever torsion spring.
(b) Install the spring holder.
9. INSTALL SHIFT LEVER DETENT PIN, SHIFT LEVER
SPRING DAMPER AND COMPRESSION SPRING TO
SHIFT LEVER SUB±ASSEMBLY
10. ASSEMBLE INDICATOR LAMP SUB±ASSEMBLY
(a) Install the terminals of the indicator lamp wire sub±as-
sembly to the connector.
(b) Install the bulb to the indicator lamp wire sub±assembly.
11. INSTALL SHIFT LEVER GUIDE HOUSING AND INDI-
CATOR LAMP SUB±ASSEMBLY
(a) Install the indicator lamp sub±assembly to the shift lever
guide housing.
(b) Install the shift lever housing with the indicator lamp sub±
assembly to the shift lever plate.

D01066
D01065
D01064
D01062
D01924
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
AT±25
1973 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Connect the indicator lamp wire sub±assembly to the shift
lever plate.
HINT:
Hook the indicator lamp wire sub±assembly securely on the re-
tainer of the shift lock plate.
12. INSTALL SHIFT LOCK RELEASE LINK AND SPRING
(a) Install the shift lock release spring to the shift lock release
link.
(b) Install the 2 shift lever housing set bolts, nuts, shift lock
release link and spring.
(c) Torque the 2 nuts.
Torque: 3.9 N´m (40 kgf´cm, 35 in.´lbf)
13. INSTALL SLIDE COVER
14. INSTALL POSITION INDICATOR LENS TO POSITION
INDICATOR HOUSING
HINT:
Fit the 4 claws of the position indicator lens in the grooves of the
position indicator housing securely.
15. INSTALL POSITION INDICATOR HOUSING
(a) Install the shift lever cap to the position indicator housing.
(b) Install the position indicator housing to the shift lever
plate.
HINT:
Fit the 4 clips of the position indicator housing in the shift lever
plate securely.
16. INSTALL WIRE PROTECTOR TO SHIFT LEVER PLATE
17. INSTALL SHIFT LEVER KNOB AND SHIFT LEVER
KNOB COVER

AT066±01
AT±26
± AUTOMATIC TRANSMISSIONFLOOR SHIFT ASSEMBLY
1974 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal.
(See page AT±16)
HINT:
After installation, inspect the shift lever position.

When shifting from P to R position only with ignition switch ON and brake pedal, make sure that the
shifting lever moves smoothly and can be moderately operated.

When starting engine, make sure that the vehicle moves forward when shifting from N to D position
and moves rearward when shifting to R position.

AT067±01
D01040

Gasket
Clamp
ClampAir Cleaner, MAF Meter and Intake
Air Connector Pipe Assembly
Exhaust Manifold with TWC
Connector and
Wire Harness Level Gauge
Filler PipeAdjusting WasherPropeller Shaft Assembly
Shift Control Rod
Torque Converter ClutchPlug for Line
Pressure TestHeat Insulator
Heated Oxygen Sensor
Front and Center
Exhaust PipeFront Floor
Center Brace
Engine Under Cover Pipe Support BracketO±Ring Heat Insulator

Gasket
Starterx6x839 (400, 29)
44 (450, 33)
72 (730, 53)
37 (380, 27)
13 (130, 9)
79 (805, 58)
37 (375, 27)
7.4 (75, 65 in.´lbf)
44 (450, 33)
44 (450, 33)
37 (380, 27)
37 (380, 27)
Hole Plug
5.4 (55, 48 in.´lbf)
Oil Cooler Pipe
x5

O±Ring
5.4 (55, 48 in.´lbf)

Gasket
44 (450, 33)


5.4 (55, 48 in.´lbf)
N´m (kgf´cm,ft´lbf) : Specified torque

Non±reusable part
Gasket
48 (490, 35)
26 (270, 20)
44 (450, 33)
44 (450, 33)


79 (805, 58)
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION UNIT (2JZ±GE)
AT±27
1975 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AUTOMATIC TRANSMISSION UNIT (2JZ±GE)
COMPONENTS

AT068±01
D01041
D01042
AT±28
± AUTOMATIC TRANSMISSIONAUTOMATIC TRANSMISSION UNIT (2JZ±GE)
1976 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE LEVEL GAUGE
2. REMOVE FILLER PIPE
Remove the bolt and filler pipe with the O±ring.
HINT:
At the time of installation, please refer to the following item.
Replace the used O±ring with a new one.
3. REMOVE AIR CLEANER, MAF METER AND INTAKE
AIR CONNECTOR PIPE ASSEMBLY
4. REMOVE EXHAUST MANIFOLD WITH TWC
Remove the 8 nuts, 2 gaskets and exhaust manifold with the
TWC.
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
HINT:
At the time of installation, please refer to the following item.
Replace the used gaskets with new ones.
5. RAISE VEHICLE
NOTICE:
Make sure that the vehicle is securely supported.
6. REMOVE ENGINE UNDER COVER
7. REMOVE FRONT AND CENTER EXHAUST PIPE
(a) Disconnect the heated oxygen sensor.
Torque: 44 N´m (450 kgf´cm, 33 ft´lbf)
HINT:
At the time of installation, please refer to the following items.

Before installing the heated oxygen sensor, twist the sen-
sor wire counterclockwise 3 and 1/2 turns.

After installing the heated oxygen sensor wire should not
twist. If it is twisted, remove the heated oxygen sensor
and reinstall it.
(b) Remove the 2 bolts and front floor center brace.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
(c) Remove the 3 bolts, nuts and 2 gaskets.
Torque: 44 N´m (450 kgf´cm, 33 ft´lbf)
HINT:
At the time of installation, please refer to the following item.
Replace the used nuts and gaskets with new ones.
(d) Remove the 2 bolts and pipe support bracket.
Torque: 44 N´m (450 kgf´cm, 33 ft´lbf)