1995 TOYOTA SUPRA clutch

A340E(Others) AUTOMATIC TRANSMISSIONDESCRIPTION -
AT-2
GENERAL SPECIFICATIONS
TRUCK, 4 RUNNER, T100:
Type of TransmissionA340E
Type of Engine3VZ-E
Torque Converter Clutch Stall Torque RatioC&C, T100 2.0 : 1
Others 2.15 : 1
Lock-up MechanismEquipped
Gear Ratio 1st Gear
2nd Gear
3rd Gear
O/D Gear
Reverse Gear2.804
1.531
1.000
0.705
2.393
Number of Discs and Plates (Disc and Plate)
O/D Direct Clutch (C
0)
Forward Clutch (C
1)
Direct Clutch (C
2)
2nd Brake (B
2)
1st and Reverse Brake (B
3)
O/D Brake (B
0)
2 / 2
5 / 5
4 / 4
5 / 5
6 / 6
4 / 3
B1 Band Width mm (in.)40 (1.57)
ATF TypeATF DEXRON® II
Capacity (US qts, Imp.qts) Total
Drain and Refill7.2 (7.6, 6.3)
1.6 (1.7, 1.4)
SUPRA:
Type of TransmissionA340E
Type of Engine2JZ-GE
Torque Converter Clutch Stall Torque Ratio1.9 : 1
Lock-up MechanismEquipped
Gear Ratio 1st Gear
2nd Gear
3rd Gear
O/D Gear
Reverse Gear2.804
1.531
1.000
0.705
2.393
Number of Discs and Plates (Disc and Plate)
O/D Direct Clutch (C
0)
Forward Clutch (C
1)
Direct Clutch (C
2)
2nd Brake (B
2)
1st and Reverse Brake (B
3)
O/D Brake (B
0)
2 / 2
5 / 5
4 / 4
5 / 5
6 / 6
4 / 3
B1 Band Width mm (in.)40 (1.57)
ATF TypeATF DEXRON® II
Capacity (US qts, Imp.qts) Total
Drain and Refill7.2 (7.6, 6.3)
1.6 (1.7, 1.4)

A340E(Others) AUTOMATIC TRANSMISSIONDESCRIPTION -
AT-3
PREVIA:
Type of TransmissionA340E
Type of Engine2TZ-FZE
Torque Converter Clutch Stall Torque Ratio2.0 : 1
Lock-up MechanismEquipped
Gear Ratio 1st Gear
2nd Gear
3rd Gear
O/D Gear
Reverse Gear2.804
1.531
1.000
0.705
2.393
Number of Discs and Plates (Disc and Plate)
O/D Direct Clutch (C
0)
Forward Clutch (C
1)
Direct Clutch (C
2)
2nd Brake (B
2)
1st and Reverse Brake (B
3)
O/D Brake (B
0)
2 / 2
5 / 5
4 / 4
5 / 5
6 / 6
3 / 2
B1 Band Width mm (in.)40 (1.57)
ATF TypeATF DEXRON® II
Capacity (US qts, Imp.qts) Total
Drain and Refill7.2 (7.6, 6.3)
1.6 (1.7, 1.4)

A340E(Others) AUTOMATIC TRANSMISSIONOPERATION -
AT-8
3. HYDRAULIC CONTROL SYSTEM
The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, and the
clutches and brakes, as well as the fluid passages which connect all of these components. Based on
the hydraulic pressure created by the oil pump, the hydraulic control system governs the hydraulic pres-
sure acting on the torque converter clutch, clutches and brakes in accordance with the vehicle driving
conditions.
There are 3 solenoid valves on the valve body.
The No.1 and No.2 solenoid valves are turned on and off by signals from the ECM to operate the shift
valves and change the gear shift position.
The lock-up solenoid valve is operated by signals from the ECM to engage or disengage the lock-up
clutch of the torque converter clutch.

LINE PRESSURE
Line pressure is the most basic and important pressure used in the automatic transmission, because
it is used to operate all of the clutches and brakes in the transmission.
If the primary regulator valve does not operate correctly, line pressure will be either too high or too low.
Line pressure that is too high will lead to shifting shock and consequent engine power loss due to the
greater effort required of the oil pump; line pressure that is too low will cause slippage of clutches and
brakes, which will, in extreme cases, prevent the vehicle from moving. Therefore, if either of these prob-
lems are noted, the line pressure should be measured to see if it is within specification.

THROTTLE PRESSURE
Throttle pressure is always kept in accordance with the opening angle of the engine throttle valve. This
throttle pressure acts on the primary regulator valve and, the line pressure is regulated according to
the throttle valve opening.
In the hydraulically controlled automatic transmission, throttle pressure is used for regulating line pres-
sure and as signal pressure for up-shift and down-shift of the transmission. In the electronically con-
trolled transmission, however, throttle pressure is used only for regulating line pressure. Consequently,
improper adjustment of the transmission throttle cable may result in a line pressure that is too high or
too low. This, in turn, will lead to shifting shock or clutch and brake slippage.

A340E(Others) AUTOMATIC TRANSMISSIONOPERATION -
AT-9
4. ELECTRONIC CONTROL SYSTEM
The electronic control system, which controls the shift points and the operation of the lock-up clutch,
is composed of the following 3 parts:
1. Sensors
These sensors sense the vehicle speed, throttle opening and other conditions and send these data to
the ECM in the form of electrical signals.
2. ECM
The ECM determines the shift and lock-up timing based upon the signals from sensors, and controls
the solenoid valves of the hydraulic control unit accordingly.
3. Actuators
These are 3 solenoid valves that control hydraulic pressure acting on the hydraulic valves to control
shifting and lock-up timing.

A340E(Others) AUTOMATIC TRANSMISSIONCOMPONENT PARTS REMOVAL -
AT-25
15. REMOVE OIL PAN
NOTICE: Do not turn the transmission over as this will con-
taminate the valve body with any foreign matter at the bot-
tom on the pan.
(a) Remove the 19 bolts.
(b) Install the blade of SST between the transmission case
and oil pan, cut off applied sealer.
SST 09032-00100
NOTICE: Be careful not to damage the oil pan flange.
(c) Remove the pan by lifting the transmission case.

16. EXAMINE PARTICLES IN PAN
Remove the magnets and use them to collect steel par-
ticles.
Carefully look at the foreign matter and particles in the
pan and on the magnets to anticipate the type of wear you
will find in the transmission.
Steel (magnetic) ... bearing, gear and clutch plate wear
Brass (non-magnetic) ... bushing wear
17. REMOVE OIL STRAINER AND GASKETS
(a) Remove the 3 bolts holding the oil strainer to the valve
body.
(b) Remove the oil strainer and 2 gaskets.
18. REMOVE OIL TUBES
Pry up both tube ends with a large screwdriver and re-
move the 2 oil tubes.

A340E(Others) AUTOMATIC TRANSMISSIONCOMPONENT PARTS REMOVAL -
AT-29
(d) Using a screwdriver, remove the 2 oil seals.
25. REMOVE OIL PUMP
(a) Stand up the transmission.
(b) Remove the 7 bolts holding the oil pump to the transmis-
sion case.
(c) Using SST, remove the oil pump.
SST 09610-20012
(d) Remove the O-ring from it.
(e) Remove the race from the oil pump.
26. REMOVE OVERDRIVE PLANETARY GEAR WITH OV-
ERDRIVE DIRECT CLUTCH AND ONE-WAY CLUTCH
(a) Remove the overdrive planetary gear with the overdrive
direct clutch and overdrive one-way clutch from the trans-
mission case.

A340E(Others) AUTOMATIC TRANSMISSIONCOMPONENT PARTS REMOVAL -
AT-33
(c) Remove the 2 O-rings from the cover.
33. REMOVE DIRECT CLUTCH WITH FORWARD CLUTCH
(a) Remove the direct clutch with the forward clutch from the
case.
(b) Remove the direct clutch from the forward clutch.
(c) Remove the assembled bearing and race, thrust washer
and race from the forward clutch.
34. REMOVE SECOND COAST BRAKE BAND
(a) Remove the E-ring from the pin.
(b) Remove the pin from the brake band.

A340E(Others) AUTOMATIC TRANSMISSIONCOMPONENT PARTS REMOVAL -
AT-35
36. REMOVE FRONT PLANETARY GEAR
(a) Using SST, remove the snap ring.
SST 09350-30029 (09350-07070)
HINT: Pushing the output shaft towards the front makes
it easier to remove.
37. REMOVE PLANETARY SUN GEAR WITH NO.1 ONE-
WAY CLUTCH
(a) Remove the planetary sun gear with No.1 one-way clutch
from the case.
(b) Remove the thrust washer.
38. CHECK PACK CLEARANCE OF SECOND BRAKE
Using a feeler gauge, measure the clearance between
the snap ring and flange.
Clearance:
0.62-1.98 mm (0.0244-0.0780 in.)
If the values are non-standard, inspect the discs.
39. REMOVE FLANGE, PLATES AND DISCS OF SECOND
BRAKE
(a) Remove the snap ring.
(b) Remove the flange, plates and discs.