Toyota Automatic Transmission A340 Series. Repair Manual — part 32

AT8401

AT8306

Front

AT8234

Inside

Outside

Race

26.8 (1.055)

47.0 (1.850)

AT8233

Inside

Outside

Bearing

32.6 (1.283)

47.7 (1.878)

Race

30.6 (1.205)

53.6 (2.110)

AT8307

Front

mm (in.)

(b)

Coat the race with petroleum jelly and install it onto

the front planetary ring gear.

HINT: Race diameter

mm (in.)

(c)

Align the flukes of the discs in the forward clutch.

(d)

Align the splines of the front planetary ring gear

with the flukes of the discs and install the front

planetary ring gear to the forward clutch.

16. INSTALL ASSEMBLED DIRECT CLUTCH, FORWARD

CLUTCH AND FRONT PLANETARY RING GEAR

INTO CASE
(a)

Coat the bearing and race with petroleum jelly

and install them onto the ring gear.

HINT: Bearing and race diameter

(b)

Install the assembled direct clutch, forward clutch

and front planetary ring gear into the transmission

case.

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT−245

AT8226

SST

AT4442

Mark

Piston Rod

E7208

9.8 − 11.8 mm

Inside

Outside

Bearing and race

33.7 (1.327)

47.6 (1.874)

AT8215

SST

AT8309

Front

mm (in.)

(c)

Using vernier calipers, measure the distance be-

tween the sun gear input drum and direct clutch

drum as shown in the figure.

Height: 9.8 − 11.8 mm (0.386 − 0.465 in.)

If the values are nonstandard, check for an improper

installation.

(d)

Coat the assembled bearing and race with petro-

leum jelly and install it onto the forward clutch.

HINT: Assembled bearing and race diameter

17. INSTALL SECOND COAST BRAKE COVER, PISTON

ASSEMBLY AND SPRING
(a)

Coat two new O−rings with ATF and install them

to the cover.

(b)

Install the spring, piston assembly and cover to

the case.

(c)

Using SST, install the snap ring.

SST

09350−30020 (09350−07060)

18. CHECK PISTON ROD STROKE OF SECOND COAST

BRAKE
(a)

Place a mark on the second coast brake piston rod

as shown in the figure.

(b)

Using SST, measure the stroke applying the com-

pressed air (4 − 8 kg /cm

2

, 57 − 114 psi or 392 −

785 kPa) as shown in the figure.

SST

09240−00020

Piston rod stroke: 1.5 − 3.0 mm (0.059 − 0.118 in.)

If it is still more than standard value, replace the brake

band with a new one.

AT−246

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT3263

AT8157

Inside

Outside

Race

36.8 (1.449)

50.9 (2.004)

Bolt and

Oil Holes

SST

AT8246

AT8312

24 mm (0.94 in.)

Front

SST

AT8247

mm (in.)

19. INSTALL OVERDRIVE SUPPORT ASSEMBLY

(a)

Coat the race with petroleum jelly and install it onto

the overdrive support assembly.

HINT: Race diameter

(b)

Using two bolts of SST, aim the bolt and oil holes

of the overdrive support toward the valve body

side, and align them with the bolt holes of the

transmission case and insert.

SST

09350−30020 (09350−07020)

(c)

Using SST, install the snap ring as shown in the

figure.

SST

09350−30020 (09350−07060)

(d)

Install and torque the two bolts.

Torque: 260 kg−cm (19 ft−lb, 25 N−m)

20. CHECK OUTPUT SHAFT

(a)

Using a dial indicator, measure the end play of the

output shaft with hand.

End play: 0.27 − 0.86 mm (0.0106 − 0.0339 in.)

If the values are nonstandard, check for an improper

installation.
(b)

Check to see that output shaft rotates smoothly.

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT−247

AT8427

AT8212

SST

O/D Brake Piston

AT8213

No.

Thickness

No.

Thickness

26

3.3 (0.130)

11

3.8 (0.150)

25

3.5 (0.138)

23

3.9 (0.154)

12

3.6 (0.142)

None

4.0 (0.157)

24

3.7 (0.146)

D5008 D5106

Flange

Disc−

Side

Front

Flange

Flange thickness

mm (in.)

21. INSTALL FLANGES, PLATES AND DISCS OF OVER-

DRIVE BRAKE
(a)

Install the 4.0 mm (0.157 in.) thick flange (flat ring)

with the rounded edge side of the flange facing the

disc.

(b)

Install the plates and discs.

Install in order: P = Plate D = Disc

D−P−D−P−D−P−D

(c)

Install the flange (stepped ring) with the flat side of

the flange facing the disc.

(d)

Install the snap ring.

22. CHECK PISTON STROKE OF OVERDRIVE BRAKE

(a)

Place SST and a dial indicator onto the overdrive

brake piston as shown in the figure.

SST

09350−30020 (09350−06120)

(b)

Measure the stroke applying and releasing the

compressed air (4 − 8 kg /cm

2

, 57 − 114 psi or 392

− 785 kPa) as shown in the figure.

Piston stroke: 1.40 − 1.70 mm (0.0551 − 0.0669 in.)

If the piston stroke is less than the limit, parts may have

been assembled incorrectly, check and reassemble

again.

If the piston stroke is nonstandard, select another flange.

HINT: There are seven different thicknesses for the

flange.

AT−248

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT8320

Front

D5002

AT8397

AT8314

Front

Inside

Outside

Bearing

33.6 (1.323)

50.3 (1.980)

Race

37.1 (1.461)

59.0 (2.323)

Inside

Outside

Bearing

26.0 (1.024)

46.8 (1.843)

Race

24.2 (0.953)

47.8 (1.882)

Inside

Outside

Race

27.1 (1.067)

41.8 (1.646)

AT8399

mm (in.)

mm (in.)

mm (in.)

23. INSTALL OVERDRIVE PLANETARY GEAR UNIT

WITH OVERDRIVE DIRECT CLUTCH AND ONE−WAY

CLUTCH
(a)

Coat the bearing and race with petroleum jelly

and install them onto the overdrive support.

HINT: Bearing and race diameter

(b)

Install the overdrive planetary ring gear.

(c)

Coat the bearing and race with petroleum jelly and

install them onto the planetary ring gear.

HINT: Bearing and race diameter

(d)

Coat the race with petroleum jelly and install it

onto the planetary gear.

HINT: Race diameter

(e)

Install the overdrive planetary gear with the over-

drive direct clutch and one−way clutch.

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT−249

AT8304

Front

AT8240

AT3161

AT4470

SST

Inside

Outside

Bearing and race

28.9 (1.138)

50.2 (1.976)

Inside

Outside

Race

28.1 (1.106)

47.3 (1.862)

AT8313

Front

mm (in.)

mm (in.)

(f)

Place SST on the transmission case.

SST

09350−36010 (09350−06090)

(g)

Using calipers, measure distance between the

tops of SST and the clutch drum.

Standard distance:

15.5 − 16.5 mm

(0.610 − 0.650 in.)

If the values are nonstandard, check for an improper

installation.

(h)

Coat the assembled bearing and race with petro-

leum jelly and install it onto the O/D direct clutch.

HINT: Assembled bearing and race diameter

24. INSTALL OIL PUMP INTO CASE

(a)

Coat the race with petroleum jelly and install it

onto the oil pump.

HINT: Race diameter

(b)

Coat a new O−ring with ATF and install it around

the pump body.

(c)

Place the oil pump through the input shaft, and

align the bolt holes of the pump body with the

transmission case.

(d)

Hold the input shaft, and lightly press the oil

pump body to slide the oil seal rings into the O/D

direct clutch drum.

NOTICE: Do not push on the oil pump strongly, or the

oil seal ring will stick to the direct clutch drum.
(e)

Install the seven bolts.

Torque: 220 kg−cm (16 ft−lb, 22 N−m)

25. CHECK INPUT SHAFT ROTATION

Make sure the input shaft rotates smoothly.

AT−250

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT8386

Magnet

AT7954

0.4 mm

(0.016 in.)

3 mm (0.12 in.)

AT7907

Apply

Gasket

E7219

C

0

Accumulator

Piston Hole

AT8389

26. INDIVIDUAL PISTON OPERATION INSPECTION

Check for the sound of operation while applying com-

pressed air into the oil hole indicated in the figure.
(1)

O/D direct clutch

(2)

Direct clutch

(3)

Forward clutch

(4)

O/D brake

(5)

Second coast brake

(6)

Second brake

(7)

First and reverse brake

HINT: When inspecting the O/D direct clutch, check

with the C

0

accumulator piston hole closed.

If there is no noise, disassemble and check the instal-

lation condition of the parts.

27. INSTALL SPEED SENSOR ROTOR AND KEY

(a)

Using snap ring pliers, install the snap ring.

(b)

Install the key on the output shaft.

(c)

Align the groove of the sensor rotor with the key,

install the sensor rotor.

(d)

Using snap ring pliers, install the snap ring.

28. INSTALL TRANSFER CASE

(a)

Clean contacting surfaces of any residual packing

material using gasoline or alcohol.

(b)

Apply seal packing to the case as shown in the

figure.

Seal packing: Part No. 08826 − 00090, THREE BOND

1281 or equivalent

(c)

Confirm the two apply gaskets are installed cor-

rectly.

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts

AT−251

AT7978

Front

AT7956

Apply Gasket

Inside

Outside

Bearing and race

51.1 (2.012)

78.6 (3.094)

AT8383

Inside

Outside

Race

33.5 (1.319)

47.8 (1.882)

AT7957

Front

AT7955

mm (in.)

50 (1.97)

40 (1.57)

mm (in.)

(d)

Install the case and torque the seven bolts.

Torque: 345 kg−cm (25 ft−lb, 34 N−m)

HINT:

S

Each bolt length (mm, in.) is indicated in the figure.

S

When assembling the transmission case and

transfer case, make sure the parking lock rod is

above the pawl.

29. INSTALL FRONT SUPPORT TO TRANSFER CASE

(a)

Coat the assembled bearing and race with petro-

leum jelly and install it onto the front support.

HINT: Assembled bearing and race diameter

(b)

Confirm the apply gasket is installed correctly.

(c)

Install the front support and torque the bolts.

Torque: 345 kg−cm (25 ft−lb, 34 N−m)

(d)

Coat the race with petroleum jelly and install it

onto the front support.

HINT: Race diameter

mm (in.)

AT−252

−

AUTOMATIC TRANSMISSION (A340H)

Installation of Component Parts