1991 LEXUS SC400 transmission

15. DISCONNECT ENGINE WIRE CONNECTORS
16. DISCONNECT THEFT DETERRENT HORN CONNECTOR
17. DISCONNECT GROUND CABLE FROM BODY
18. DIS CO NNE CT PO WE R STE E RING (P S ) SO LE NO IDVALVE CONNECTOR
19. DISCONNECT WIRE CLAMP (FOR GENERATOR) FROM VSV (FOR EVAP)
(a) Remove the 2 bolts, and disconnect the VSV from the RH
cylinder head.
(b) Disconnect the wire clamp from the VSV bracket.
20. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the cap and nut, and disconnect the generator wire.
(c) Remove the bolt, and disconnect the transmission oil cooler pipe bracket from the generator.
(d) Remove the nut and generator.
21. DISCONNECT POWER STEERING (PS) TUBES FROM SUSPENSION CROSSMEMBER
Remove the clamp bolt, and disconnect the PS tubes.
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1UZ±FE ENGINE ENGINE MECHANICALEG±143
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(i) Remove the bolt holding the engine wire clamp to the heaterwater valve bracket.
(j) Remove the 2 bolts holding the engine wire clamp to the
body.
(k) Pull out the engine wire from the cabin.
NOTICE: Be careful not to damage the engine wire.
28. DISCONNECT SUB HEATED OXYGEN SENSORS FROM FRONT EXHAUST PIPE
(a) Disconnect the 2 wire grommets from the floor panel.
(b) Disconnect the 2 oxygen sensors from the exhaust pipe.
29. REMOVE FRONT EXHAUST PIPE
(a) Remove the 4 bolts holding the pipe support bracket to the transmission.
(b) Remove the 2 bolts and nuts holding the front exhaust pipe to the center exhaust pipe.
(c) Remove the 4 bolts and nuts holding the front exhaust pipe to the TWC.
(d) Remove the pipe support bracket, front exhaust pipe and 3 gaskets.
30. REMOVE TWC (FRONT) Using a 14 mm deep socket wrench, remove the 3 nuts, TWC
and gasket. Remove the 2 TWC.
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36. DISCONNECT TRANSMISSION CONTROL ROD FROMSHIFT LEVER
Remove the nut, and disconnect the control rod from the shift
lever.
37. REMOVE ENGINE AND TRANSMISSION A SSEMBLY
FROM VEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Remove the 2 nuts holding the engine mounting insulators to
the front suspension crossmember.
(c) Remove the 4 bolts, 4 nuts and rear engine m ounting
member. Disconnect the ground strap.
(d) Lift the engine out of the vehicle slowly and carefully. HINT: Make sure the engine is clear of all wirings, hoses and
cables.
NOTICE: Be careful not hit the PS gear housing, PNP switch
and ABS actuator.
(e) Place the engine and transmission assembly onto the stand.
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COMPONENTS FOR ENGINE &
TRANSMISSION SEPERATION AND
ASSEMBLY
EG0BS±0F
ENGINE & TRANSMISSION SEPARATION
EG24X±01
(See Components for Engine & Transmission Separation and
Assembly)
1. REMOVE OIL DIPSTICK GUIDE AND DIPSTICK FOR TRANSMISSION
(a) Remove the bolt.
(b) Pull out the dipstick guide and dipstick from the port of transmission.
(c) Remove the O±ring from the dipstick guide.
2. REMOVE OIL COOLER PIPES FOR TRANSMISSION
(a) Remove the 2 bolts.
(b) Loosen the 2 union nuts, and remove the oil cooler pipes.
EG±150
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3. DISCONNECT ENGINE WIRE
(a) Disconnect the following connector:(1) O/D direct clutch speed sensor connector
(2) No.1 VSS connector for Speedometer
(3) No.2 VSS connector for ECM
(4) PNP switch connector
(5) Solenoid connector
(b) D i s c onnect the 5 wire clamps from the brackets on
transmission.
4. REMOVE TRANSMISSION (See page AT±23)
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ENGINE & TRANSMISSION ASSEMBLY
EG34U±01
(See Components for Engine & Transmission Separation and
Assembly)
1. INSTALL TRANSMISSION TO ENGINE
(See page AT±23)
2. CONNECT ENGINE WIRE
(a) Connect the following parts: (1) O/D direct clutch speed sensor connector
(2) No.1 VSS connector for speedometer
(3) No.2 VSS connector for ECM
(4) PNP switch connector
(5) Solenoid connector
(b) Install the 5 wire clamps to the brackets on the transmission.
EG±190
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3. INSTALL OIL COOLER PIPE FOR TRANSMISSION
(a) Temporarily install the oil cooler pipe with the 2 pipe bracketsand 2 bolts.
(b) C onnect the 2 oil cooler pipes to the unions on the
transmission.
Torque: 34 N Vm (350 kgf Vcm, 26 ft Vlbf)
(c) Tighten the 2 pipe clamp bolts.
4. INSTALL OIL DIPSTICK GUIDE AND DIPSTICK FOR
TRANSMISSION
(a) Install a new O±ring to the dipstick guide
(b) Apply soapy water to the O±ring
(c) Connect the dipstick guide end to the dipstick tube of the oil
pan.
(d) Install the dipstick guide with the bolt.
(e) Install the dipstick.
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ENGINE INSTALLATION
EG2HW±02
(See Components for Engine Removal and Installation)
1. INSTALL ENGINE AND TRANSMISSION ASSEMBLY INVEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Slowly lower the engine and transmission assembly into the engine compartment.
NOTICE: Be careful not to hit the PS gear housing and
PNP switch.
(c) Insert the stud bolts of the front engine mounting brackets into the stud bolt holes of the front suspension crossmember.
(d) Keep the engine level.
(e) Install the rear engine mounting member with the 4 bolts and 4 nuts.
Torque:
25 NVm (250 kgf Vcm, 19 ft Vlbf) for bolt
13 N Vm (135 kgf Vcm, 10 ft Vlbf) for nut
(f) Install the 2 nuts holding the engine mounting brackets to the
front suspension crossmember.
Torque: 59 N Vm (600 kgf Vcm, 43 ft Vlbf)
EG±192±
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