Toyota Automatic Transmission A340 Series. Repair Manual — part 24

AT4917

AT4286

AT7944

AT4916

AT4915

(b)

Pull out the chain with the drive sprocket and driv-

en shaft.

31. REMOVE TRANSFER CHAIN OIL RECEIVER

32. REMOVE TRANSFER CHAIN FRONT CASE WITH

FRONT OUTPUT SHAFT

33. REMOVE FRONT OUTPUT SHAFT FROM TRANSFER

CHAIN FRONT CASE

34. REMOVE TRANSFER FRONT DRIVE CLUTCH

(a)

Remove the snap ring.

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT−181

AT8030

AT7946

AT7947

AT8382

AT7945

(b)

Grasp and pull out the transfer front drive clutch.

(c)

Remove the snap ring from the output shaft.

35. CHECK PACK CLEARANCE OF TRANSFER LOW

SPEED BRAKE
Using a feeler gauge, measure the clearance between

the snap ring and flange as shown in the figure.

Clearance: 0.91 − 2.10 mm (0.0358 − 0.0827 in.)

If the values are nonstandard, inspect the discs.

(See page AT−202)

36. REMOVE TRANSFER CENTER SUPPORT AND

TRANSFER LOW SPEED BRAKE
Pushing the center support forward, remove the snap

ring.

(b)

Grasp the shaft and pull out the transfer center

support with the transfer low speed brake assem-

bly.

AT−182

−

AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT7949

AT7951

AT7952

AT7950

AT7948

(c)

Remove the front flange from the case.

(d)

Remove the race and assembled bearing and

race from the sun gear.

37. REMOVE SUN GEAR

(a)

Pull out the sun gear.

(b)

Remove the race and assembled bearing and

race from the transfer direct clutch.

38. REMOVE TRANSFER DIRECT CLUTCH

(a)

Remove the snap ring.

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT−183

AT8383

AT7917

AT8384

AT8385

AT7953

(b)

Remove the transfer direct clutch from the transfer

case.

39. REMOVE FRONT SUPPORT

(a)

Remove the front support from the transfer case.

(b)

Remove the assembled bearing and race from

the front support.

40. REMOVE TRANSFER CASE

41. REMOVE SPEED SENSOR ROTOR AND KEY

(a)

Using snap ring pliers, remove the snap ring.

AT−184

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT8431

AT8430

AT8386

AT8432

AT7874

SST

(b)

Remove the sensor rotor and key.

(c)

Using snap ring pliers, remove the front snap ring.

42. REMOVE OIL PUMP

(a)

Stand up the transmission.

(b)

Remove the seven bolts holding the oil pump to the

transmission case.

(c)

Using SST, remove the oil pump.

SST

09610−20012

(d)

Remove the O−ring from it.

(e)

Remove the race from the oil pump.

43. REMOVE OVERDRIVE PLANETARY GEAR UNIT

WITH OVERDRIVE DIRECT CLUTCH AND ONE−WAY

CLUTCH
(a)

Remove the overdrive planetary gear with the

overdrive direct clutch and one−way clutch from

the transmission case.

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT−185

AT8429

AT8428

AT8213

AT8212

SST

AT3148

(b)

Remove the race and assembled bearing and race.

(c)

Remove the bearing and race.

(d)

Remove the overdrive planetary ring gear from the

transmission case.

44. 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 values are nonstandard, inspect the discs.

(See page AT−61)

AT−186

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

D5008

AT4442

Mark

Piston Rod

AT8215

SST

AT8226

SST

AT8427

45. REMOVE FLANGES, PLATES AND DISCS OF

OVERDRIVE BRAKE
(a)

Remove the snap ring.

(b)

Remove the flanges, plates and discs as a set.

HINT: Two flanges, three plates and four discs

46. 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 the values are nonstandard, inspect the brake band.

(See page AT−84)

47. REMOVE SECOND COAST BRAKE COVER, PISTON

ASSEMBLY AND SPRING
(a)

Using SST, remove the snap ring.

SST

09350−30020 (09350−07060)

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AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts

AT−187

AT5044

AT8426

SST

AT8425

SST

AT8214

AT8227

(b)

Applying compressed air to the oil hose, remove the

second coast brake cover, piston assembly and

spring.

(c)

Remove the two O−rings from the cover.

48. REMOVE OVERDRIVE SUPPORT ASSEMBLY

(a)

Remove the race and bearing.

(b)

Remove the two bolts holding the overdrive support

assembly to the case.

(c)

Using SST, remove the snap ring.

SST

09350−30020 (09350−07060)

(d)

Using SST, remove the overdrive support assembly.

SST

09350−30020 (09350−07020)

AT−188

−

AUTOMATIC TRANSMISSION (A340H)

Removal of Component Parts