TOYOTA SIENNA 2007 Service Repair Manual

AX–190U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
AX
38. REMOVE UNDERDRIVE PLANETARY GEAR
ASSEMBLY
(a) Remove the bolt and pawl shaft clamp.
(b) Remove the parking lock pawl shaft.
(c) Push the parking lock pawl.
HINT:
Failure to do so will cause interference when the
underdrive planetary gear is removed.
(d) Remove the underdrive planetary gear assembly
from the transaxle case.
NOTICE:
Be careful so that the underdrive planetary gear
assembly will not fall out.
39. REMOVE PARKING LOCK PAWL
(a) Remove the spring, pawl pin and parking lock pawl.
D003576E02
D009652
D009689
D003579E03
D026386

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–191
AX
40. REMOVE UNDERDRIVE CLUTCH ASSEMBLY
(a) Remove the underdrive clutch assembly, thrust
bearing and bearing race from the transaxle case.
41. REMOVE UNDERDRIVE 1-WAY CLUTCH ASSEMBLY
(a) Using a screwdriver, remove the snap ring from the
transaxle case.
NOTICE:
Do not apply excessive force when removing
the snap ring.
(b) Remove the underdrive 1-way clutch from the
transaxle case.
(c) Remove the outer race retainer from the 1-way
clutch.
42. REMOVE UNDERDRIVE CLUTCH DISC NO.2
(a) Using a screwdriver, remove the snap ring.
NOTICE:
Do not apply excessive force when removing
the snap ring.
D003580E01
D003581E01
D003627E01
D003907E01
D026466E01

AX–192U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
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(b) Remove the flange, 4 discs and 4 plates from the
transaxle case.
43. INSPECT UNDERDRIVE CLUTCH DISC NO.2
HINT:
(See page AX-201)
44. REMOVE TRANSAXLE REAR COVER SUB-
ASSEMBLY
(a) Remove the 11 bolts.
(b) Tap on the circumference of the rear cover with a
plastic hammer to remove the transaxle rear cover
from the transaxle case.
45. REMOVE TRANSAXLE CASE NO.1 PLUG
(a) Remove the 4 transaxle case No.1 plugs from the
transaxle rear cover.
(b) Remove the 4 O-rings from the 4 transaxle case
No.1 plugs.
46. REMOVE REAR CLUTCH OIL SEAL RING OUTER
(a) Remove the 3 rear clutch oil seal rings from the
transaxle rear cover.
47. REMOVE NEEDLE-ROLLER BEARING
(a) Using SST, remove the needle-roller bearing from
the transaxle rear cover.
SST 09387-00041 (09387-01021, 09387-01030,
09387-01040)
D026385E01
D026387E02
D026388
D026389E01
D026472E01

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–193
AX
48. REMOVE GOVERNOR APPLY GASKET NO.1
(a) Using a screwdriver, remove the 3 apply gaskets.
49. REMOVE BRAKE APPLY TUBE
(a) Remove the bolt, clamp and brake apply tube.
(b) Remove the clutch apply tube.
(c) Remove the brake apply tube from the clamp.
NOTICE:
Do not bend the tubes.
50. REMOVE DIRECT CLUTCH ASSEMBLY
(a) Remove the thrust bearing and the direct clutch
assembly from the transaxle case.
51. REMOVE OVERDRIVE DIRECT CLUTCH HUB SUB-
ASSEMBLY
(a) Remove the thrust bearing race, thrust bearing and
overdrive direct clutch hub from the planetary gear
assembly.
52. INSPECT OVERDRIVE DIRECT CLUTCH DRUM SUB-
ASSEMBLY
HINT:
(See page AX-202)
53. REMOVE REAR PLANETARY SUN GEAR ASSEMBLY
(a) Remove the rear planetary sun gear assembly from
the transaxle case.
D026390
D026391E03
D026403E02
D026392E03
D026714E02

AX–194U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
AX
(b) Remove the thrust needle roller bearing and thrust
bearing race from the rear planetary sun gear
assembly.
(c) Remove the planetary carrier thrust washer No.2
from the rear planetary sun gear assembly.
54. REMOVE 1-WAY CLUTCH ASSEMBLY
(a) Remove the 1-way clutch assembly and the thrust
needle roller bearing from the transaxle case.
(b) Remove the 1-way clutch inner race from the 1-way
clutch assembly.
55. REMOVE 1-WAY CLUTCH SLEEVE OUTER
(a) Remove the 1-way clutch sleeve outer from the
transaxle case.
D026404E03
D026393E01
D026598E02
D003909E01
D003589E02

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–195
AX
56. REMOVE PLANETARY CARRIER THRUST WASHER
NO.1
(a) Remove the planetary carrier thrust washer No.1
from the planetary gear assembly.
57. REMOVE 2ND BRAKE CLUTCH DISC
(a) Using a screwdriver, remove the snap ring.
(b) Remove the flange, 4 discs and 4 plates from the
transaxle case.
58. INSPECT 2ND BRAKE CLUTCH DISC
HINT:
(See page AX-202)
59. REMOVE 2ND BRAKE PISTON ASSEMBLY
(a) Using a screwdriver, remove the snap ring.
(b) Remove the 2ND brake piston assembly from the
transaxle case.
60. REMOVE REAR PLANETARY GEAR ASSEMBLY
(a) Using a screwdriver, remove the snap ring.
D026394E02
D026395E01
D008058E01
D026396E04
D003616E01

AX–196U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
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(b) Remove the rear planetary gear assembly from the
transaxle case.
61. REMOVE INPUT SUN GEAR
(a) Remove the 2 thrust needle roller bearings, thrust
bearing race No.2 and the input sun gear from the
transaxle case.
62. REMOVE 1ST AND REVERSE BRAKE CLUTCH DISC
(a) Remove the flange, 6 discs and 6 plates from the
transaxle case.
63. INSPECT 1ST AND REVERSE BRAKE CLUTCH DISC
HINT:
(See page AX-202)
64. REMOVE FRONT PLANETARY GEAR ASSEMBLY
(a) Using a chisel and hammer, unstake the lock
washer.
NOTICE:
Push down all claws of the washer. Otherwise
the SST cannot be fully pressed against the nut,
and cannot loosen the nut.
(b) Using SST, remove the nut.
SST 09387-00030, 09387-00080
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D003873E02
D026397
D003595E01
D003596E01

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–197
AX
(c) Using SST and a press, remove the front planetary
gear assembly from the counter drive gear.
SST 09950-60010 (09951-00450), 09950-70010
(09951-07100)
(d) Remove the front planetary gear assembly from the
brake hub.
65. REMOVE FRONT PLANETARY RING GEAR
(a) Using a screwdriver, remove the snap ring and front
planetary ring gear from the brake hub.
66. REMOVE 1ST AND REVERSE BRAKE RETURN
SPRING SUB-ASSEMBLY
(a) Place SST on the return spring, and compress the
return spring with a press.
SST 09387-00070
(b) Using a snap ring expander, remove the snap ring.
NOTICE:
• Stop the press when the spring seat is
lowered 1 to 2 mm (0.039 to 0.078 in.) from the
snap ring groove, to prevent the spring seat
from being deformed.
• Do not expand the snap ring excessively.
67. INSPECT 1ST AND REVERSE BRAKE RETURN
SPRING SUB-ASSEMBLY
HINT:
(See page AX-202)
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D026763E01
D003615E02
D003600E01

AX–198U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
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68. REMOVE 1ST AND REVERSE BRAKE PISTON
(a) Apply compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi)
to the transaxle case to remove the 1st and reverse
brake piston.
NOTICE:
• Applying compressed air may cause the
piston to jump-out. When removing the
piston, hold it using a waste cloth.
• Take care not to splash ATF when applying
compressed air.
(b) Remove the 2 O-rings from the 1st and reverse
brake piston.
69. REMOVE COUNTER DRIVE GEAR
(a) Using SST and a press, remove the counter drive
gear from the transaxle case.
SST 09950-60010 (09951-00590), 09950-70010
(09951-07100)
(b) As shown in the illustration, tighten the 2 bolts
evenly and make clearance of approx. 20.0 mm
(0.787 in.) between the counter drive gear and the
inner race.
(c) Using SST, remove the tapered roller bearing.
SST 09950-60010 (09951-00590), 09950-00020,
09950-00030, 09950-40011 (09957-04010)
D026405E01
D026713E01
C089120E01
D003602E01
D003603E01

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–199
AX
70. REMOVE TRANSFER DRIVEN PINION FRONT
BEARING
(a) Using a snap ring expander, remove the snap ring.
(b) Using SST and a press, remove the bearing outer
race.
SST 09950-60020 (09951-00910)
71. REMOVE BREATHER PLUG NO.2 (ATM)
72. REMOVE UNDERDRIVE BRAKE RETURN SPRING
SUB-ASSEMBLY
(a) Place SST on the return spring, and compress the
return spring with a press.
SST 09387-00020
(b) Using a snap ring expander, remove the snap ring.
NOTICE:
• Stop the press when the spring seat is
lowered 1 to 2 mm (0.039 to 0.078 in.) from the
snap ring groove, to prevent the spring seat
from being deformed.
• Do not expand the snap ring excessively.
73. INSPECT UNDERDRIVE BRAKE RETURN SPRING
SUB-ASSEMBLY
HINT:
(See page AX-203)
74. REMOVE UNDERDRIVE BRAKE PISTON
(a) Apply compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi)
to the transaxle case to remove the underdrive
brake piston.
D026467E01
C089121E01
D026407E01
D026406E01