TOYOTA SUPRA 1995 Service Repair Manual

A340E(Others) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-54
(b) Apply compressed air into the oil passage as shown, and
be sure that the O/D brake piston moves smoothly.
2. REMOVE CLUTCH DRUM THRUST WASHER FROM
OVERDRIVE SUPPORT
3. REMOVE PISTON RETURN SPRING
(a) Place SST on the spring retainer, and compress the re-
turn spring with a shop press.
SST 09350-30020 (09350-07030)
(b) Remove the snap ring with a screwdriver.
(c) Remove the piston return spring.
4. REMOVE OVERDRIVE BRAKE PISTON
(a) Place the O/D support onto the direct clutch assembly.
(b) Hold the O/D brake piston so it does not slant, and apply
compressed air into the passage to remove the O/D brake
piston.
(c) Remove the O/D brake piston.
(d) Remove the 2 O-rings from the piston.

A340E(Others) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-55
5. REMOVE 2 OIL SEAL RINGS
OVERDRIVE BRAKE INSPECTION
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 a part of the printed numbers are defaced, re-
place all discs.

Before assembling new discs, soak them in ATF for
at least 15 minutes.
OVERDRIVE BRAKE ASSEMBLY
1. INSTALL OIL SEAL RINGS
(a) Coat the 2 oil seal rings with ATF.
(b) Install the 2 oil seal rings to the O/D support groove, then
snug them down by squeezing their ends together.
NOTICE: Do not spread the ring ends more than necessary.
HINT: After installing the oil seal rings, check that they ro-
tate smoothly.
2. INSTALL OVERDRIVE BRAKE PISTON
(a) Coat the 2 new O-rings with ATF and install them on the
O/D brake piston.
(b) Being careful not to damage the O-rings, press in the
brake piston into the O/D support with both hands.
AT05H-06
AT05J-07

A340E(Others) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-56
3. INSTALL PISTON RETURN SPRING
(a) Install the piston return spring.
(b) Place SST on the spring retainer, and compress the re-
turn spring with a shop press.
SST 09350-30020 (09350-07030)
(c) Install the snap ring with a screwdriver. Be sure the end
gap of the snap ring is not aligned with the cutout portion
of the O/D support.
4. INSTALL CLUTCH DRUM THRUST WASHER
Coat the thrust washer with petroleum jelly and install it
onto the O/D support.
HINT: Make sure that the lug shape matches the hole on
the O/D support.
5. CHECK OVERDRIVE BRAKE PISTON MOVEMENT
(a) Place the O/D support assembly onto the direct clutch as-
sembly.
(b) Apply compressed air into the oil passage as shown, and
be sure that the O/D brake piston moves smoothly.

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-57
DIRECT CLUTCH
COMPONENTS
DIRECT CLUTCH DISASSEMBLY
1. REMOVE DIRECT CLUTCH DRUM FROM FORWARD
CLUTCH
2. REMOVE CLUTCH DRUM THRUST WASHER FROM
DIRECT CLUTCH
AT05K-05
AT05L-07

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-58
3. CHECK PISTON STROKE OF DIRECT CLUTCH
(a) Place the direct clutch assembly onto the O/D support as-
sembly.
(b) Using SST and a dial indicator, measure the direct clutch
piston stroke while applying and releasing compressed
air (392-785 kPa, 4-8 kgf/cm
2, 57-114 psi).
SST 09350-30020 (09350-06120)
Piston stroke:
1.37-1.60 mm (0.0359-0.0630 in.)
If the values are non-standard, inspect the discs.
4. REMOVE FLANGE, PLATES AND DISCS
(a) Using a screwdriver, remove the snap ring from the direct
clutch drum.
(b) Remove the flange, plates and discs.
5. REMOVE PISTON RETURN SPRING
(a) Place SST on the spring retainer and compress the return
spring with a shop press.
SST 09350-30020 (09350-07040)
(b) Using snap ring pliers, remove the snap ring.
(c) Remove the piston return spring.
6. REMOVE DIRECT CLUTCH PISTON
(a) Place the direct clutch drum onto the O/D support.
(b) Hold the direct clutch piston, apply compressed air to the
O/D support to remove the direct clutch piston.
(c) Remove the direct clutch piston.
(c) Remove the 2 O-rings from the piston.

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-59
DIRECT CLUTCH INSPECTION
1. 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 a part of the printed numbers are defaced, re-
place all discs.

Before assembling new discs, soak them in ATF for
at least 15 minutes.
2. CHECK DIRECT CLUTCH PISTON
(a) Check that the check ball is free by shaking the piston.
(b) Check that the valve does not leak by applying low-pres-
sure compressed air.
3. CHECK DIRECT CLUTCH DRUM BUSHING
Using a dial indicator, measure the inside diameter of the
clutch drum bushing.
Maximum inside diameter:
53.99 mm (2.1256 in.)
If the inside diameter is greater than the maximum, re-
place the clutch drum.
DIRECT CLUTCH ASSEMBLY
1. INSTALL DIRECT CLUTCH PISTON TO DIRECT
CLUTCH DRUM
(a) Coat new O-rings with ATF and install them on the direct
clutch piston.
(b) Being careful not to damage the O-rings, press in the di-
rect clutch piston into the clutch drum with both hands.
AT05M-06
AT05N-08

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-60
2. INSTALL PISTON RETURN SPRING
(a) Install the piston return spring.
(b) Place SST on the spring retainer, and compress the re-
turn spring with a shop press.
SST 09350-30020 (09350-07040)
(c) Install the snap ring with snap ring pliers. Be sure the end
gap of the snap ring is not aligned with the spring retainer.
3. INSTALL PLATES, DISCS AND FLANGE
(a) Install the plates and discs.
Install in order: P = Plate D = Disc
P-D-P-D-P-D-P-D
(b) Install the flange, the flat end facing downward.
(c) Install the snap ring with a screwdriver. Be sure the end
gap of the snap ring is not aligned with the cutout portion
of the direct clutch drum.

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-61
4. CHECK PISTON STROKE OF DIRECT CLUTCH
(a) Place the direct clutch assembly onto the O/D support as-
sembly.
(b) Using SST and a dial indicator, measure the direct clutch
piston stroke while applying and releasing compressed
air (392-785 kPa, 4-8 kgf/cm
2, 57-114 psi).
SST 09350-30020 (09350-06120)
Piston stroke:
1.37-1.60 mm (0.0539-0.0630 in.)
If the piston stroke is less than the limit, parts may have
been assembled incorrectly, so check and reassemble
again.
If the piston stroke is non- standard, select another
flange.
HINT: There are 8 different thicknesses for the flange.
Flange thickness
mm (in.)
No.ThicknessNo.Thickness
333.0 (0.118)293.4 (0.134)
323.1 (0.122)283.5 (0.138)
313.2 (0.126)273.6 (0.142)
303.3 (0.130)343.7 (0.146)
5. INSTALL CLUTCH DRUM THRUST WASHER
Coat the thrust washer with petroleum jelly and install it
onto the direct clutch.
6. INSTALL DIRECT CLUTCH TO FORWARD CLUTCH
(a) Align the flukes of discs in the direct clutch.
(b) Install the direct clutch onto the forward clutch.

A340E(Others) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-62
(c) Check that the distance from the direct clutch end to the
forward clutch end is 71.2 mm (2.803 in.).
If the distance is less than the above value, parts may
have been assembled incorrectly, check and reassemble
again.

A340E(Others) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-63
FORWARD CLUTCH
COMPONENTS
FORWARD CLUTCH DISASSEMBLY
1. REMOVE FORWARD CLUTCH ASSEMBLY FROM DI-
RECT CLUTCH ASSEMBLY
2. PLACE FORWARD CLUTCH ONTO OVERDRIVE SUP-
PORT
(a) Place wooden blocks or similar, to prevent forward clutch
shaft from touching the work stand, and place the O/D
support on them.
(b) Place the forward clutch onto the O/D support.
AT05P-05
AT05Q-07