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

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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