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.

−

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