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
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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
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