Toyota Automatic Transmission A340 Series. Repair Manual - part 1

Pub. Name

Pub. No.

’91 Supra Repair Manual

’91 Cressida Repair Manual

’91 Truck Repair Manual

’91 4 runner Repair Manual

RM198U

RM200U

RM201U2

RM202U2

Automatic Transmission

Applicable Model

A340F

A340H

A340E

’91 Supra, ’91 Cressida

’91 Truck, ’91 4 runner

”91 Truck, ”91 4 runner

’91 Truck, ’91 4 runner

FOREWORD

This repair manual covers Disassembly, Inspection and As-

sembly procedures for the following Automatic Transmissions:

For On−vehicle Servicing (Inspection, Adjustment, Trouble-

shooting, Removal and Installation) of Automatic Transmission,

refer to the repair manual for the applicable vehicle model.

All information contained in this manual is the most up−to−

date at the time of publication. However, specifications and

procedures are subject to change without notice.

TOYOTA MOTOR CORPORATION

HOW TO USE THIS MANUAL

To assist you in finding your way through the manual, the

Section Title and major heading are given at the top of every

page.

REPAIR PROCEDURES

Most repair operations begin with an overview illustration. It

identifies the components and shows how the parts fit to-

gether.

Example:

kg−cm (ft−Ib, N−m)

AT5461

♦ Non−reusable part

: Specified torque

♦ Oil Seat

♦ O−Ring

Oil Pump Drive Gear

Oil Seal Ring

Oil Pump Driven Gear

100 (7, 10)

Startor Shaft

Oil Pump Body

IN−2

−

INTRODUCTION

How to Use This Manual

Illustration:

What to do and where

This format provides the experienced technician with a FAST

TRACK to the information needed. The upper case task head-

ing can be read at a glance and only when necessary, the text

below it provides detailed information. Important specifications

and warnings always stand out in bold type.

SST

09350−32014 (09351−32190)

If replacing the disc, plate or flange, check the piston

stroke:

Set part No.

Piston stroke: 1.41 − 1.82 mm (0.0555 − 0.0717 in.)

The procedures are presented in a step−by−step format:

S

Illustration shows what to do and where to do it.

S

The task heading tells what to do.

S

The detailed text tells how to perform the task and

gives other information such as specifications and

warnings.

Example:

Task heading: what to do

7.

CHECK PISTON STROKE OF FORWARD CLUTCH

Detail text: how to do it

Using a dial indicator (long type pick or SST), measure

the forward clutch piston stroke applying and releasing

the compressed air (4 − 8 kg/cm

2

 or 57 − 114 psi or

392 − 785 kPa) as shown.

Component part No.

Specification

REFERENCES

References have been kept to a minimum. However, when

they are required you are given the page to go to.

SPECIFICATIONS

Specifications are presented in bold type throughout the text in

the applicable step. You never have to leave the procedure to

look up your specs. All specifications are also found in Appen-

dix A, specifications for quick reference.

CAUTIONS, NOTICES, HINTS:

S

CAUTIONS are presented in bold type, and indicate

there is a possibility of injury to you or other people.

S

NOTICES are also presented in bold type, and indicate

the possibility of damage to the components being re-

paired.

S

HINTS are separated from the text but do not appear in

bold. They provide additional information to help you effi-

ciently perform the repair.

−

INTRODUCTION

How to Use This Manual

IN−3

IN0036

Seal Lock Adhesive

GENERAL REPAIR INSTRUCTIONS

1.

Use fender, seat and floor covers to keep the vehicle

clean and prevent damage.

2.

During disassembly, keep parts in order to facilitate

reassembly.

3.

Observe the following:
(a)

Before performing electrical work, disconnect the

negative cable four the battery terminal.

(b)

If it is necessary to disconnect the battery for in-

spection or repair, always disconnect the cable from

the negative (−) terminal which is grounded to the

vehicle body.

(c)

To prevent damage to the battery terminal post,

loosen the terminal nut and raise the cable straight

up without twisting it or prying it.

(d)

Clean the battery terminal posts and cable termi-

nals with a shop rag. Do not scrape them with a file

or other abrasive object.

(e)

Install the cable terminal to the battery post with the

nut loose, and tighten the nut after installation. Do

not use a hammer or such to tap the terminal onto

the post.

(f)

Be sure the cover for the positive (+) terminals are

properly in place.

4.

Check hoses and wiring connectors to make sure

that they are secure and correct.

5.

Non−reusable parts
(a)

Always replace cotter pins, gaskets, O−rings and oil

seals etc. with new ones.

(b)

Non−reusable parts are indicated in the component

illustrations by the ”♦” symbol.

6.

Precoated parts

Precoated parts are the bolts and nuts, which have

been coated with a seal lock adhesive at the factory.
(a)

If a precoated part is retightened, loosened or

caused to move in any way, it must be recoated

with the specified adhesive.

(b)

Recoating of precoated parts
(1)

Clean off the old adhesive from the bolt, nut

or installation part threads.

(2)

Dry with compressed air.

(3)

Apply the specified seal lock adhesive to the

bolt or nut threads.

(c)

Precoated parts are indicated in the component il-

lustrations by the ”L” symbol.

IN−4

−

INTRODUCTION

General Repair Instructions

7.

When necessary, use a sealer on gaskets to prevent

leaks.

8.

Carefully observe all specifications for bolt tighten-

ing torques. Always use a torque wrench.

9.

Use of special service tools (SST) and special ser-

vice materials (SSM) may be required, depending on

the nature of the repair. Be sure to use SST and SSM

where specified and follow the proper work proce-

dure. A list of SST and SSM can be found at the back

of this manual.

10. When replacing fuses, be sure the new fuse has the

correct amperage rating. DO NOT exceed the fuse

amp rating or use one of a lower rating.

11. Care must be taken when jacking up and supporting

the vehicle. Be sure to lift and support the vehicle at

the proper locations.
(a)

If the vehicle is to be jacked up only at the front or

rear end, be sure to block the wheels in order to

ensure safety.

(b)

After the vehicle is jacked up, be sure to support it

on stands. It is extremely dangerous to do any

work on the vehicle raised on jack alone, even for a

small job that can be finished quickly.

−

INTRODUCTION

General Repair Instructions

IN−5

ABBREVIATIONS USED IN THIS MANUAL

ADD 

Automatic Disconnecting Differential

A/T ATM 

Automatic Transmission

ATF Automatic 

Transmission 

Fluid

B

0

 Overdrive 

Brake

B

1

 

Second Coast Brake

B

2

 Second 

Brake

B

3

 

First and Reverse Brake

C

0

 Overdrive 

Clutch

C

1

 Forward 

Clutch

C

2

 Direct 

Clutch

D Disc

Ex. Except

MP Multipurpose

O/D Overdrive

P Plate

SSM 

Special Service Materials

SST 

Special Service Tools

w/ With

w/o Without

IN−6

−

INTRODUCTION

Abbreviations Used in This Manual

AT4366

Sectional View

(A340E)

DESCRIPTION

General

The A340E is a 4−speed, Electronic Controlled Transmission (hereafter called ECT) developed for use

with high−performance engine. A lock−up mechanism is built into the torque converter.

The A340F automatic transmission is a 4−speed automatic transmission with mechanically controlled

4WD transfer, developed with the aim of producing an easy−driving 4WD vehicle. The transmission sec-

tion has fundamentally the same construction as the A340E automatic transmission.

The A340H automatic transmission is a 4−speed automatic transmission with electronically controlled

4Wd transfer, developed with the aim of producing an easy driving 4WD vehicle.

The transfer section consists of planetary gears, hydraulic clutches and hydraulic brake. The operation of

these is fully controlled by the Engine & ECT ECU.

The A340E, A340F and A340H automatic transmissions are mainly composed of the torque converter,

the overdrive (hereafter called O/D) planetary gear unit, 3−speed planetary gear unit, the hydraulic con-

trol system and the electronic control system.

−

AUTOMATIC TRANSMISSION

Description

AT−3

AT5744
AT5068

Transfer Hydraulic

Control Unit

Transmission Hydraulic

Control Unit

2−Speed Transfer

3−Speed Planetary

Gear Unit

Torque Converter with

Lock−Up Clutch

 (A340H)

Sectional View

O/D Planetary

Gear Unit

(A340F)

AT−4

−

AUTOMATIC TRANSMISSION

Description