Content .. 10 11 12 13 ..

Toyota Automatic Transmission A340 Series. Repair Manual - part 12

AT8185

AT8438

SST

AT8439

AT8184

AT8452

ASSEMBLY OF SECOND BRAKE

INSTALL SECOND BRAKE PISTON
(a)

Coat new O−rings with ATF and install them on

second brake piston.

(b)

Being careful not to damage the O−rings, press

the second brake piston into the second brake

drum with both hands.

INSTALL PISTON RETURN SPRING
(a)

Install the piston return spring.

(b)

Install the spring retainer.

(c)

Place SST on the spring retainer, and compress

the return spring with a shop press.

SST

09350−30020 (09350−07040)

(d)

Using snap ring pliers, install the snap ring.

CHECK SECOND BRAKE PISTON MOVEMENT
Make sure the second brake piston moves smoothly

when applying and releasing low−pressure compressed

air to the second brake drum.

INSTALL THRUST WASHER
Coat the thrust washer with petroleum jelly and install it.

HINT: Make sure that the cutout portions of thrust

washer match teeth of the spring retainer.

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AUTOMATIC TRANSMISSION

Component Parts (Second Brake)

AT−85

AT6460

Printed

Number

AT6426

♦ Non−reusable part

Snap Ring

♦ O−Ring

No. 1 Brake Piston

♦ O−Ring

Piston Return Spring

No. 2 Brake Piston

Reaction Sleeve

Plate

Cushion Plate

Disc

S TRUCK

S 4RUNNER

Plate

3VZ−E

Plate

Flange

A340H

Flange

S SUPRA

S CRESSIDA

7M−GTE

Disc

First and Reverse Brake

COMPONENTS

INSPECTION OF FIRST AND REVERSE BRAKE

INSPECT DISC, PLATE AND FLANGE

Check to see if the sliding surface of the disc, plate and

flange are worn or burnt. If necessary, replace them.

HINT:

If the lining of the disc is peeling off or discolored,

or even if parts of the printed numbers are de-

faced, replace all discs.

Before assembling new discs, soak them in ATF

for at least fifteen minutes.

AT−86

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AUTOMATIC TRANSMISSION

Component Parts (First and Reverse Brake)

AT8197

AT8198

AT4458

Oil Seal Ring

Output Shaft

Rear Planetary

Ring Gear

A340E

A340F

Bearing

Ring Gear Flange

Snap Ring

A340H

Race

One−Way Clutch

Inner Race

No. 2 Thrust Washer

No. 1 Thrust Washer

Snap Ring

Rear Planetary Gear

No. 2 One−Way

Clutch

COMPONENTS

Rear Planetary Gear, No. 2 One−Way Clutch and Output Shaft

DISASSEMBLY OF REAR PLANETARY GEAR,

NO. 2 ONE−WAY CLUTCH AND OUTPUT SHAFT

REMOVE OUTPUT SHAFT FROM REAR PLANETARY

GEAR ASSEMBLY

REMOVE OIL SEAL RING FROM OUTPUT SHAFT

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AUTOMATIC TRANSMISSION

Component Parts (Rear Planetary Gear,

No. 2 One−Way Clutch and Output Shaft)

AT−87

AT8200

Turn

Hold

Lock

Free

AT8192

AT8193

AT8191

AT8199

REMOVE REAR PLANETARY GEAR FROM REAR

PLANETARY RING GEAR

CHECK OPERATION OF NO. 2 ONE−WAY CLUTCH
Hold the planetary gear and turn the one−way clutch

inner race. The one−way clutch inner race turns freely

counterclockwise and locks clockwise.

REMOVE NO. 2 ONE−WAY CLUTCH
(a)

Remove the one−way clutch inner race from the

rear planetary gear.

(b)

Remove the snap ring with a screwdriver.

(c)

Remove No. 2 one−way clutch with retainers from

the planetary gear.

AT−88

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AUTOMATIC TRANSMISSION

Component Parts (Rear Planetary Gear,

No. 2 One−Way Clutch and Output Shaft)

AT8437

AT8206

AT4459

AT8207

AT8038

No. 1

No. 2

REMOVE NO. 2 AND NO. 1 THRUST WASHERS

REMOVE RACES AND BEARING FROM REAR

PLANETARY RING GEAR

REMOVE RING GEAR FLANGE
(a)

Remove the snap ring with a screwdriver.

(b)

Remove the ring gear flange.

INSPECTION OF REAR PLANETARY GEAR

MEASURE PLANETARY PINION GEAR THRUST CLEAR-

ANCE

Using feeler gauge, measure the planetary pinion gear thrust

clearance:

Standard clearance: 0.20 − 0.60 mm

(0.0079 − 0.0236 in.)

Maximum clearance: 1.00 mm (0.0394 in.)

If the clearance is greater than the maximum, replace the

planetary gear assembly.

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AUTOMATIC TRANSMISSION

Component Parts (Rear Planetary Gear,

No. 2 One−Way Clutch and Output Shaft)

AT−89

AT8324

AT8038

No. 1

No. 2

AT2494

Guide

Open End

Inside

Outside

Race (A)

28.8 (1.134)

44.8 (1.764)

Bearing

34.1 (1.185)

44.7 (1.760)

Race (B)

27.8 (1.094)

44.8 (1.764)

AT8192

AT8206

mm (in.)

ASSEMBLY OF REAR PLANETARY GEAR, NO. 2

ONE−WAY CLUTCH AND OUTPUT SHAFT

INSTALL RING GEAR FLANGE
(a)

Install the ring gear flange.

(b)

Install the snap ring.

INSTALL RACES AND BEARING
Coat the races and bearing with petroleum jelly, and

install them onto the rear planetary ring gear.

HINT: Races and bearing diameter

INSTALL NO. 1 AND NO. 2 THRUST WASHERS
(a)

Coat the thrust washers with petroleum jelly.

(b)

Install the thrust washers onto both sides of the

rear planetary gear.

HINT: Make sure that the lug shapes match the cutout

portions on the rear planetary gear.

INSTALL NO. 2 ONE−WAY CLUTCH
(a)

Install the one−way clutch and two retainers into

the rear planetary gear as shown in the figure.

HINT: Make sure that the open ends of the guides on

the one−way clutch are faced upward.

(b)

Install the snap ring.

AT−90

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AUTOMATIC TRANSMISSION

Component Parts (Rear Planetary Gear,

No. 2 One−Way Clutch and Output Shaft)

AT8200

Turn

Hold

Lock

Free

AT8198

AT8197

AT8199

AT8191

(c)

While turning counterclockwise, install the one−

way clutch inner race to the rear planetary gear.

CHECK OPERATION OF NO. 2 ONE−WAY CLUTCH
Hold the planetary gear and turn the one−way clutch

inner race. The one−way clutch inner race turns freely

counterclockwise and locks clockwise.

INSTALL REAR PLANETARY GEAR ONTO REAR

PLANETARY RING GEAR

INSTALL OIL SEAL RING
Coat the oil seal ring with ATF and install it to the output

shaft.

NOTICE: Do not spread the ring ends too match.

HINT: After installing the oil seal ring, check that it ro-

tates smoothly.

INSTALL OUTPUT SHAFT INTO REAR PLANETARY

GEAR ASSEMBLY

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AUTOMATIC TRANSMISSION

Component Parts (Rear Planetary Gear,

No. 2 One−Way Clutch and Output Shaft)

AT−91

AT4460

Detent Spring

AT8210

AT1399

♦ Non−reusable part

kg−cm (ft−lb, N−m)

: Specified torque

Lower Valve Body

Manual Valve

♦ No.2 Gasket

100 (7, 10)

Detent Spring

Valve Body

Plate

♦ No.1 Gasket

65 (56 in.−lb, 6.4)

Upper Valve Body

Valve Body

COMPONENTS

(Disassembly of Valve Body)

UNBOLT AND REMOVE DETENT SPRING

REMOVE MANUAL VALVE

AT−92

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AUTOMATIC TRANSMISSION

Component Parts (Valve Body)

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