Toyota Automatic Transmission A340 Series. Repair Manual — part 14
AT7900
AT8224
Transmission Case
INSPECTION OF TRANSMISSION CASE
INSPECT TRANSMISSION CASE BUSHING
Using a cylinder gauge, measure the inside diameter of
the transmission case rear bushing.
Maximum inside diameter: 38.19 mm (1.5035 in.)
If the inside diameter is greater than the maximum, re-
place the transmission case.
Extension Housing
INSPECTION OF EXTENSION HOUSING
INSPECT EXTENSION HOUSING BUSHING
Using a cylinder gauge, measure the inside diameter of
the extension housing bushing.
Maximum inside diameter: 40.09 mm (1.5783 in.)
If the inside diameter is greater than the maximum, re-
place the extension housing.
−
AUTOMATIC TRANSMISSION
Component Parts (Transmission Case,
Extension Housing)
AT−101
INSTALLATION OF COMPONENT PARTS (A340E)
(See pages AT−25 to AT−28)
Disassembly, inspection and assembly of each component group have been indicated in the pre-
ceding chapter. Before assembly, make sure again that all component groups are assembled cor-
rectly.
If something wrong is found in a certain component group during assembly, inspect and repair
this group immediately.
Recommended ATF: DEXRONR II
GENERAL NOTES:
1.
The automatic transmission is composed of highly precision−finished parts, necessitating
careful inspection before assembly because even a small nick could cause fluid leakage or
affect performance.
2.
Before assembling new clutch discs, soak them in automatic transmission fluid for at least
fifteen minutes.
3.
Apply automatic transmission fluid on sliding or rotating surfaces of parts before assembly.
4.
Use petroleum jelly to keep small parts in their place.
5.
Do not use adhesive cements on gaskets and similar parts.
6.
When assembling the transmission, be sure to use new gaskets and O−rings.
7.
Dry all parts with compressed air − never use shop rags.
8.
When working with FIPG material, you must observe the following.
S
Using a razor blade and gasket scraper, remove all the old packing (FIPG) material
from the gasket surfaces.
S
Thoroughly clean all components to remove all the loose material.
S
Clean both sealing surfaces with a non−residue solvent.
S
Parts must be assembled within 10 minutes of application. Otherwise, the packing
(FIPG) material must be removed and reapplied.
AT−102
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT6331
* Assembled type bearing and race
mm (in.)
Front Bearing Race
Thrust Bearing
Rear Bearing Race
Inner Diameter
Outer Diameter
Inner Diameter
Outer Diameter
Inner Diameter
Outer Diameter
28.1 (1.106)
47.3 (1.862)
28.9 (1.138)
50.2 (1.976)
27.1 (1.067)
41.8 (1.646)
26.0 (1.024)
46.8 (1.843)
24.2 (0.953)
47.8 (1.882)
SUPRA
37.2 (1.465)
Others
37.1 (1.461)
59.0 (2.323)
58.8 (2.315)
33.6 (1.323)
33.7 (1.327)
50.3 (1.980)
51.1 (2.012)
36.8 (1.449)
50.9 (2.004)
33.7 (1.327)
47.6 (1.874)
26.0 (1.024)
48.9 (1.925)
26.0 (1.024)
46.7 (1.839)
26.8 (1.055)
47.0 (1.850)
30.6 (1.205)
53.6 (2.110)
32.6 (1.283)
47.7 (1.878)
34.3 (1.350)
47.0 (1.850)
33.7 (1.327)
47.6 (1.874)
35.5 (1.398)
47.7 (1.878)
28.8 (1.134)
44.8 (1.764)
30.1 (1.185)
44.7 (1.760)
27.8 (1.094)
44.8 (1.764)
39.2 (1.543)
57.7 (2.272)
INSTALLATION POSITION AND DIRECTION OF BEARINGS AND RACES
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT−103
AT4465 AT4995
Column Shift
Floor Shift
AT8238
AT4466
AT8209
Reaction Sleeve
No. 1 Piston
AT8330
SST
1.
INSTALL MANUAL VALVE LEVER, SHAFT AND OIL
SEALS
(a)
Using SST, drive in two oil seals.
SST
09350−30020 (09350−07110)
(b)
Coat the oil seal lip with MP grease.
(c)
Assemble a new spacer to the manual valve le-
ver.
(d)
Install the manual valve lever shaft to the trans-
mission case through the manual valve lever.
(e)
Drive in the pin to the shaft.
(f)
Match the spacer hole to the lever calking hollow
and calk the spacer to the lever.
(g)
Make sure the manual valve lever shaft turns
smoothly.
2.
INSTALL COMPONENTS OF FIRST AND REVERSE
BRAKE PISTON
(a)
Coat three new O−rings with ATF.
(b)
Install the two O−rings on No. 1 piston.
(c)
Install the O−ring on the reaction sleeve.
(d)
Install the No. 1 piston to the reaction sleeve.
AT−104
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT8333
No. 2 Piston
AT4468
No. 2
Piston
Return
Spring
AT4661 AT8336
Retainer Claw
SST
Snap Ring
AT4445
AT4467
(e)
Coat a new O−ring with ATF and install it on No.
2 piston.
(f)
Install No. 1 piston with the reaction sleeve onto
No. 2 piston.
(g)
Align the teeth of No. 2 piston into the proper
grooves.
(h)
Being careful not to damage the O−rings, press in
No. 2 and No. 1 first and reverse brake pistons
into the transmission case.
(i)
Place the piston return spring onto No. 2 piston.
(j)
Set SST as shown, and compress the return−
spring with SST.
SST
09350−30020 (09350−07050)
(k)
Install the snap ring with a screwdriver. Be sure
the end gap of the snap ring is not aligned with
the spring retainer claw.
3.
CHECK FIRST AND REVERSE BRAKE PISTONS
MOVING
Make sure the first and reverse brake pistons move
smoothly when applying and releasing the compressed
air into the transmission case.
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT−105
AT8310
Front
AT7893
AT5107
AT8183
Inside
Outside
Bearing and
race
39.2 (1.543)
57.7 (2.272)
AT8208
mm (in.)
4.
INSTALL LEAF SPRING
5.
INSTALL REAR PLANETARY GEAR UNIT WITH SEC-
OND BRAKE DRUM, FIRST AND REVERSE BRAKE
PACK AND OUTPUT SHAFT
(a)
Reinstall the original flange, the rounded edge
facing forward.
(b)
Install the plates and discs.
Install in order: P = Plate D = Disc
(7M−GTE)
D−P−D−P−D−P−D−P−D−P−D−P−D−P
(Others)
D−P−D−P−D−P−D−P−D−P−D−P
(c)
Install the second brake drum assembly.
(d)
Coat the assembled bearing and race with petro-
leum jelly and install it onto the case.
HINT: Assembled bearing and race diameter
(e)
Align the teeth of the second brake drum, flange,
discs and plates as shown in the figure.
AT−106
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT8230
AT8317
Front
SST
AT8223
No.
Thickness
No.
Thickness
50
5.0 (0.197)
53
4.4 (0.173)
51
4.8 (0.189)
54
4.2 (0.165)
52
4.6 (0.181)
55
4.0 (0.157)
AT8454
mm (in.)
(f)
Align the splines of the transmission case and the
assembled rear planetary gear, second brake
drum, first and reverse brake pack and output
shaft, indicated by A.
(g)
Hold the output shaft with wooden blocks.
(h)
Using SST, install the snap ring.
SST
09350−30020 (09350−07060)
6.
CHECK PACK CLEARANCE OF FIRST AID REVERSE
BRAKE
Using a thickness gauge, measure the clearance be-
tween the plate and second brake drum as shown in the
figure.
Clearance:
(7M−GTE)
0.70 − 1.22 mm (0.0276 − 0.0480 in.)
(Others)
0.60 − 1.12 mm (0.0236 − 0.0441 in.)
If the values are nonstandard, select another flange.
HINT: There are six different thicknesses for the flange.
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AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
AT−107
AT8502
Front
AT4469
AT8222
AT8239
D5035
7.
INSTALL SECOND BRAKE PISTON SLEEVE
8.
INSTALL NEW BRAKE GASKET
9.
INSTALL PARKING LOCK PAWL AND ROD
(a)
Install the E−ring to the shaft.
(b)
Install the parking lock pawl, shaft and spring.
(c)
Connect the parking lock rod to the manual valve
lever.
(d)
Install the parking lock pawl bracket and torque
the bolts.
Torque: 75 kg−cm (65 in.−lb, 7.4 N−m)
AT−108
−
AUTOMATIC TRANSMISSION (A340E)
Installation of Component Parts
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