Toyota Automatic Transmission A340 Series. Repair Manual — part 31
mm (in.)
AT4997
* Assembled type bearing and race
(TRANSFER)
Front Bearing Race
Thrust Bearing
Rear Bearing Race
Inner Diameter
Outer Diameter
Inner Diameter
Outer Diameter
Inner Diameter
Outer Diameter
51.1 (2.012)
78.6 (3.094)
33.5 (1.319)
47.8 (1.882)
30.5 (1.201)
48.0 (1.890)
19.0 (0.748)
45.0 (1.772)
23.1 (0.909)
45.0 (1.772)
36.3 (1.429)
53.9 (2.122)
38.0 (1.496)
57.3 (2.256)
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT−237
AT4466
AT8209
Reaction Sleeve
No. 1 Piston
AT4465 AT4956
AT8238
AT8330
SST
1.
INSTALL MANUAL VALVE LEVER, SHAFT AND OIL
SEALS
(a)
Using SST, drive in two new 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 lever.
(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 No. 1 piston to the reaction sleeve.
AT−238
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT4468
No. 2
Piston
Return
Spring
AT4445
AT4467
AT8303
Retainer Claw
SST
Snap Ring
AT8333
No. 2 Piston
(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 (A340H)
Installation of Component Parts
AT−239
AT8183
AT5107
Leaf
Spring
AT8310
Front
AT7893
Inside
Outside
Bearing and race
39.2 (1.543)
57.7 (2.272)
AT8208
mm (in.)
4.
INSTALL REAR PLANETARY GEAR UNIT WITH SEC-
OND BRAKE DRUM, FIRST AND REVERSE BRAKE
PACK AND OUTPUT SHAFT
(a)
Install the one plate.
(b)
Install the cushion plate rounded end toward you.
(c)
Re−install the flange, the rounded edge facing
forward.
(d)
Install the plates and discs.
Install in order: P = Plate D = Disc
D−P−D−P−D−P−D−P−D−P−D−P
(e)
Install the second brake drum assembly.
(f)
Install the leaf spring.
(g)
Coat the assembled bearing and race with petro-
leum jelly and install it onto the case.
HINT: Assembled bearing and race diameter
(h)
Align the teeth of the second brake drum, flange,
discs and plates as shown in the figure.
AT−240
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT8317
Front
SST
D5076 D5077
Front
AT8454
AT8223
No.
Thickness
No.
Thickness
50
51
52
5.0 (0.197)
4.8 (0.189)
4.6 (0.181)
53
54
55
4.4 (0.173)
4.2 (0.165)
4.0 (0.157)
E7131
Flange thickness
mm (in.)
(i)
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.
(j)
Hold the output shaft with wooden blocks.
(k)
Using SST, install the snap ring.
SST
09350−30020 (09350−07060)
5.
CHECK PACK CLEARANCE OF FIRST AND REVERSE
BRAKE
Using a feeler gauge, measure the clearance between
the plate and second brake drum as shown in the figure.
Clearance: 0.60 − 1.32 mm (0.0236 − 0.0520 in.)
If the values are nonstandard, select another flange.
HINT: There are six different thicknesses for the flange.
6.
INSTALL SECOND BRAKE PISTON SLEEVE
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT−241
AT8222
AT8315
Side
Disc
Flange
AT8404
AT8321
Front
AT4469
7.
INSTALL NEW BRAKE DRUM GASKET
8.
INSTALL PARKING LOCK ROD
(a)
Connect the parking lock rod to the manual valve
lever.
(b)
Shift the manual valve lever to the P position, and
confirm the transfer direct clutch drum is correctly
locked up by the lock pawl.
9.
INSTALL NO. 1 ONE−WAY CLUTCH
10. INSTALL FLANGE, PLATES AND DISCS OF SECOND
BRAKE
(a)
Install the plate with the rounded edge side of the
plate facing the disc.
Plate thickness: 1.8 mm (0.071 in.)
(b)
Install the plates and discs.
Install in order: P = Plate D = Disc
D−P−D−P−D−P−D−P−D
(c)
Install the flange with the rounded edge of the
flange facing the disc.
(d)
Install the snap ring.
AT−242
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT8420
AT8421
SST
AT8318
Thrust
Washer
AT3156
Front
Inside
Outside
Bearing
35.5 (1.398)
47.7 (1.878)
Race
33.7 (1.327)
47.6 (1.874)
E7135
mm (in.)
11. CHECK PACK CLEARANCE OF SECOND BRAKE
Using a feeler gauge, measure the clearance between
the snap ring and flange as shown in the figure.
Clearance: 0.62 − 1.98 mm (0.0244 − 0.0780 in.)
If the values are nonstandard, check for an improper
installation.
12. INSTALL PLANETARY SUN GEAR
While turning the planetary sun gear clockwise, install
it into No. 1 one−way clutch.
HINT: Confirm the thrust washer is installed correctly.
13. INSTALL FRONT PLANETARY GEAR
(a)
Coat the bearing and race with petroleum jelly
and install them onto the front planetary gear.
HINT: Bearing and race diameter
(b)
Install the front planetary gear to the sun gear.
(c)
Using SST, install the snap ring.
SST
09350−30020 (09350−07070)
(d)
Remove the wooden blocks under the output shaft.
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
AT−243
AT8402
AT8231
AT8305
Front
Inside
Outside
Race
34.3 (1.350)
47.8 (1.882)
AT8232
Inside
Outside
Bearing
26.0 (1.024)
46.7 (1.839)
Race
26.0 (1.024)
48.9 (1.925)
AT8311
Front
mm (in.)
mm (in.)
(e)
Coat the bearing race with petroleum jetty and
install it onto the front planetary gear.
HINT: Race diameter
14. INSTALL SECOND COAST BRAKE BAND
(a)
Install the second coast brake band to the case.
(b)
Install the pin through the brake band.
(c)
Install the E−ring to the pin.
15. INSTALL FRONT PLANETARY RING GEAR TO
FORWARD AND DIRECT CLUTCH
(a)
Coat the bearing and race with petroleum jelly
and install them onto the forward clutch.
HINT: Bearing and race diameter
AT−244
−
AUTOMATIC TRANSMISSION (A340H)
Installation of Component Parts
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