TOYOTA SUPRA 1995 Service Repair Manual

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-43
OVERDRIVE BRAKE
COMPONENTS
OVERDRIVE BRAKE DISASSEMBLY
1. 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.
AT0DS-02
AT0DT-02

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-44
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.
5. REMOVE OIL SEAL RINGS

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-45
OVERDRIVE BRAKE 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 OVERDRIVE BRAKE PISTON RETURN
SPRING
Check the spring free length together with the spring seat.
Standard free length:
17.23 mm (0.6783 in.)
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 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.
AT0DU-04
AT0DV-04

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONOVERDRIVE BRAKE -
AT-46
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
into 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 (2JZ-GTE) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-47
DIRECT CLUTCH
COMPONENTS
DIRECT CLUTCH DISASSEMBLY
1. CHECK PACK CLEARANCE 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
pack clearancewhile applying and releasing compressed
air (186-206 kPa, 1.9-2.1 kgf/cm
2, 27-30 psi).
SST 09350-30020 (09350-06120)
Pack clearance:
0.50 - 0.80 mm (0.0197 - 0.0315 in.)
If the values are non-standard inspect the discs.
AT0DW-02
AT0DX-04

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-48
2. REMOVE FLANGE, PLATES AND DISCS
(a) Using a screwdriver, remove the snap ring from the direct
clutch drum.
(b) Remove the flange, 5 plates and 5 discs.
3. 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 SST, remove the snap ring.
SST 09350-30020 (09350-07070)
(c) Remove the piston return spring.
4. REMOVE DIRECT CLUTCH PISTON
(a) Place the direct clutch drum onto the O/D support.
(b) Hold the direct clutch piston and apply compressed air to
the O/D support to remove the direct clutch piston.
HINT: Make sure the direct clutch piston is square in the
drum before applying compressed air.
(c) Remove the direct clutch piston.

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-49
(d) Using a small screwdriver, remove the 2 O-rings from the
piston.
DIRECT CLUTCH INSPECTION
1. CHECK DIRECT CLUTCH PISTON RETURN SPRING
Check the spring free length together with the spring seat.
Standard free length:
23.25 mm (0.9154 in.)
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. 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.
4. CHECK DIRECT CLUTCH BUSHING
Using a dial indicator, measure the inside diameter of the
clutch drum bushing.
Maximum inside diameter:
53.97 mm (2.1248 in.)
If the inside diameter is greater than the maximum, re-
place the clutch drum.
AT0DY-04

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-50
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.
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) Using SST, install the snap ring.
SST 09350-30020 (09350-07070)
Be sure the end gap of the snap ring is not aligned with
the spring retainer claw.
3. INSTALL PLATES, DISCS AND FLANGE
(a) Install the plates and discs.
Install in order: P = Plate D = Disk
P-D-P-D-P-D-P-D-P-D
(b) Install the flange, the flat end facing downward.
AT0DZ-04

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONDIRECT CLUTCH -
AT-51
(c) Using a screwdriver, install the snap ring. Be sure the end
gap of the snap ring is not aligned with the cutout portion
of the direct clutch drum.
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
pack clearance while applying and releasing compressed
air (186-206 kPa, 1.9-2.1 kgf/cm
2, 27-30 psi).
SST 09350-30020 (09350-06120)
Pack clearance:
0.50 - 0.80 mm (0.0197 - 0.0315 in.)
If the pack clearance is less than the limit, parts may have
been assembled incorrectly, so check and reassemble
again.
If the pack clearance is non-standard, select another
flange.
HINT: There are 9 different flange thicknesses.
Flange thickness
mm (in.)
No.ThicknessNo.Thickness
862.7 (0.106)303.3 (0.130)
852.8 (0.110)293.4 (0.134)
842.9 (0.114)283.5 (0.138)
333.0 (0.118)273.6 (0.142)
323.1 (0.122)343.7 (0.146)
313.2 (0.126)--

A340E (2JZ-GTE) AUTOMATIC TRANSMISSIONFORWARD CLUTCH -
AT-52
FORWARD CLUTCH
COMPONENTS
FORWARD CLUTCH DISASSEMBLY
1. PLACE FORWARD CLUTCH INTO OVERDRIVE SUP-
PORT
(a) Place wooden blocks, etc. 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.
2. CHECK FORWARD CLUTCH PACK CLEARANCE
Using SST and a dial indicator, measure forward clutch
pack clearance while applying and releasing compressed
air (186-206 kPa, 1.9-21. kgf/cm
2, 27-30 psi).
SST 09350-30020 (09350-06120)
Pack clearance:
0.70-1.00 mm (0.0276-0.0394 in.)
If the values are non-standard, inspect the discs.
AT0E0-02
AT0E1-04