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Toyota Automatic Transmission A340 Series. Repair Manual - part 20

AT5785

AT5776

AT5786

SST

AT8223

AT7893

(f)

Align the teeth of the second brake drum, flange,

discs and plates as shown in the figure.

(g)

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.

(h)

Hold the output shaft with wooden blocks or

equivalents.

(i)

Using SST, install the snap ring.

SST

09350−30020 (09350−07060)

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: 0.50 − 1.02 mm (0.0197 − 0.0402 in.)

If the values are nonstandard, select another flange.

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−149

AT4469

AT5781

No.

Thickness

No.

Thickness

5.0 (0.197)

4.4 (0.173)

4.8 (0.189)

4.2 (0.165)

4.6 (0.181)

4.0 (0.157)

AT5788

AT5787

Flange Thickness

mm (in.)

HINT: There are six different thicknesses for the flange.

INSTALL SECOND BRAKE PISTON SLEEVE

INSTALL NEW BRAKE DRUM GASKET

INSTALL NO. 1 ONE−WAY CLUTCH

INSTALL FLANGE, PLATES AND DISCS OF SECOND

BRAKE
(a)

Install the plate with the rounded edge side of the

plate facing the discs.

Plate thickness: 2.5 mm (0.098 in.)
(b)

Install the plates and discs.

Install in order: P = Plate D = Disc

D−P−D−P−D−P−D
(c)

Install the flange with the rounded edge of the

flange facing the disc.

AT−150

−

AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT5215

A73156

Front

AT5778

AT5790

Inside

Outside

Bearing

35.5 (1.398)

47.7 (1.878)

Race

33.7 (1.327)

47.6 (1.874)

AT5789

mm (in.)

(d)

Install the snap ring.

10. 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: 0.50 − 1.76 mm (0.0197 − 0.0693 in.)

If the values are nonstandard, check for an improper

installation.

11. 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.

12. 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.

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−151

AT5775

AT5772

AT5791

Inside

Outside

Race

34.3 (1.350)

47.8 (1.882)

AT5245

AT5777

SST

(c)

Using SST, install the snap ring.

SST

09350−30020 (09350−07070)

(d)

Remove the wooden blocks or equivalents under

the output shaft.

(e)

Coat the bearing race with petroleum jelly and

install it onto the front planetary gear.

HINT: Race diameter

mm (in.)

13. 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.

AT−152

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT8401

AT8233

AT8306

Front

Inside

Outside

Bearing

26.0 (1.024)

46.7 (1.839)

Race

26.0 (1.024)

48.9 (1.925)

Inside

Outside

Race

26.8 (1.055)

47.0 (1.850)

AT8307

Front

Inside

Outside

Bearing

32.6 (1.283)

47.7 (1.878)

Race

30.6 (1.205)

53.6 (2.110)

AT8305

Front

mm (in.)

14. INSTALL FRONT PLANETARY RING GEAR TO FOR-

WARD AND DIRECT CLUTCH
(a)

Coat the bearing and race with petroleum jelly

and install them onto the forward clutch.

HINT: Bearing and race diameter

(b)

Coat the race with petroleum jelly and install it

onto the front planetary ring gear.

HINT: Race diameter

(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.

15. 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

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−153

AT5213

AT5793

AT5766

SST

AT5764

Mark

Piston Rod

Inside

Outside

Bearing and

race

33.7 (1.327)

47.6 (1.874)

AT5792

mm (in.)

(b)

Install the assembled direct clutch, forward clutch

and front planetary ring gear into the transmission

case.

(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

16. 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)

17. CHECK PISTON ROD STROKE OF SECOND COAST

BRAKE
(a)

Place a mark on the second coast brake piston

rod as shown in the figure.

AT−154

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT5794

SST

AT8312

24 mm (0.94 in.)

SST

Front

AT5795

Inside

Outside

Race

36.8 (1.449)

50.9 (2.004)

AT8157

AT5765

SST

(b)

Using SST, measure the stroke applying the com-

pressed air (4 − 8 kg /cm

, 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.

18. INSTALL OVERDRIVE SUPPORT ASSEMBLY

(a)

Coat the race with petroleum jelly and install it

onto the overdrive support assembly.

HINT: Race diameter

mm (in.)

(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)

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

AT−155

AT5763

AT8427

AT8212

SST

O/D Brake Piston

AT5762

AT5796

19. 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.

20. 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

discs.

(b)

Install the plates and discs.

Install in order: P = Plate D = Disc
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.

21. 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 com-

pressed air (4 − 8 kg/cm

, 57 − 114 psi or 392 − 785

kPa) as shown in the figure.

Piston stroke: 1.32 − 1.62 mm (0.0520 − 0.0638 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.

AT−156

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AUTOMATIC TRANSMISSION (A340F)

Installation of Component Parts

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