2007 TOYOTA SIENNA differential

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–219
AX
(c) Install the pawl shaft clamp with the bolt.
Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf)
(d) Using a straightedge and vernier calipers as shown
in the illustration, measure the gap between the top
of the differential drive pinion in the underdrive
planetary gear and the contact surface of the
transaxle case and housing (Dimension E).
NOTICE:
Record dimension E for the following process.
(e) As shown in the illustration, measure the 2 places of
the transaxle housing, and calculate dimension F
using the formula below.
NOTICE:
Recoad dimension F for the following process.
HINT:
Dimension F = Dimension (1) - Dimension (2)
43. INSTALL MULTIPLE DISC CLUTCH HUB
(a) Install the thrust bearing race No.1 to the transaxle
case while checking its direction.
Bearing race diameter: mm (in.)
(b) Coat the thrust needle roller bearing and race with
yellow petrolatum, install them onto the multiple disc
clutch hub.
Thrust bearing and race diameter: mm (in.)
(c) Coat the needle roller bearing with ATF.
D003576E02
D003875E01
D025511E01
D008087E02
Inside Outside
Bearing race 39.5 (1.555) 45.8 (1.803)
D026710E02
Inside Outside
Thrust Bearing 36.4 (1.433) 52.2 (2.055)

AX–220U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
AX
(d) Install the needle roller bearing to the multiple clutch
hub.
Bearing diameter: mm (in.)
(e) Install the multiple clutch hub to the transaxle case.
44. INSTALL FORWARD CLUTCH ASSEMBLY
(a) Coat the thrust needle roller bearing with ATF.
(b) Install the thrust needle roller bearing to the forward
clutch.
Thrust bearing diameter: mm (in.)
NOTICE:
Install the thrust bearing properly so that the no-
colored race or blue ink jet race will be visible.
(c) Install the forward clutch to the forward clutch
assembly.
NOTICE:
• Align the splines of all discs in the forward
clutch with those of multiple clutch hub to
install them securely.
• Be careful not to damage the bushing inside
of the forward clutch hub during installation.
45. INSTALL OVERDRIVE BRAKE GASKET
(a) Install 2 new overdrive brake gaskets.
46. INSTALL DIFFERENTIAL GEAR ASSEMBLY
(a) Install the differential gear assembly to the transaxle
case.
D026711E02
Inside Outside
Bearing 23.6 (0.929) 44 (1.732)
D003820E01
Inside Outside
Thrust Bearing 33.58 (1.3220) 51.9 (2.043)
D003574E02
D003573
D026450E04

AX–184U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNIT
AX
28. INSPECT INPUT SHAFT ENDPLAY
HINT:
(See page AX-200)
29. REMOVE TRANSAXLE HOUSING
(a) Remove the 16 bolts.
(b) Tap on the circumference of the transaxle housing
with a plastic hammer to remove the transaxle
housing from the transaxle case.
NOTICE:
The differential may be accidentally removed
when the transaxle housing is removed.
30. REMOVE OIL PUMP ASSEMBLY
(a) Remove the 7 bolts and oil pump from the transaxle
case.
31. REMOVE THRUST NEEDLE ROLLER BEARING
(a) Remove the thrust needle roller bearing from the
underdrive planetary gear assembly.
32. REMOVE THRUST BEARING UNDERDRIVE RACE
NO.2
(a) Remove the thrust bearing underdrive race No.2
from the underdrive planetary gear assembly.
C115282
D003569E05
D025505E02
D025506E03

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–185
AX
33. REMOVE DIFFERENTIAL GEAR ASSEMBLY
(a) Remove the differential gear assembly from the
transaxle case.
34. REMOVE OVERDRIVE BRAKE GASKET
(a) Remove the 2 overdrive brake gaskets from the
transaxle case.
35. REMOVE FORWARD CLUTCH ASSEMBLY
(a) Remove the forward clutch assembly from the
transaxle case.
(b) Remove the thrust needle roller bearing from the
forward clutch.
36. REMOVE MULTIPLE DISC CLUTCH HUB
(a) Remove the thrust needle roller bearing, multiple
disc clutch hub, thrust needle roller bearing and
thrust bearing race No.1 from the transaxle case.
37. INSPECT MULTIPLE DISC CLUTCH CLUTCH HUB
HINT:
(See page AX-197)
D026450E04
D003573
D003574E02
D003906E01
D026787E03

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–197
AX
79. REMOVE UNDERDRIVE OUTPUT SHAFT OIL SEAL
RING
(a) Remove the oil seal ring from the transaxle housing.
80. REMOVE DIFFERENTIAL GEAR LUBE APPLY TUBE
(a) Remove the bolt, transaxle apply tube clamp and
differential gear lube apply tube from the transaxle
housing.
NOTICE:
Do not bend the tubes.
INSPECTION
1. INSPECT MULTIPLE DISC CLUTCH HUB
(a) Using a dial indicator, measure the inside diameter
of the forward clutch hub bushing
Standard inside diameter:
23.025 to 23.046 mm (0.9065 to 0.9073 in.)
Maximum inside diameter:
23.09 mm (0.9091 in.)
NOTICE:
Check the contact surface of the bushing in the
direct clutch shaft. If any scratch or
discoloration is found, replace the direct clutch
sub-assembly with a new one.
If the inside diameter is greater than the maximum,
replace the forward clutch hub with a new one.
2. INSPECT UNDERDRIVE CLUTCH DISC NO.2
(a) Check if the sliding surfaces of the disc, plate and
flange are worn or burnt.
If necessary, replace them.
NOTICE:
• If the lining of the disc comes off or discolors,
or if a part of the groove is worn, replace all
discs.
• Before installing new discs, immerse them in
ATF for at least 15 minutes.
D003915E05
D026400E02
D003829E02
D009196

U151E AUTOMATIC TRANSAXLE – UNDERDRIVE PLANETARY GEARAX–255
AX
DISASSEMBLY
1. INSPECT UNDERDRIVE PLANETARY GEAR
PRELOAD
HINT:
(See page AX-256)
2. REMOVE FRONT PLANETARY GEAR NUT
(a) Using SST, loosen the staked part of the lock nut.
SST 09930-00010 (09931-00010, 09931-00020),
09387-00050
(b) Place the underdrive planetary gear in a soft jaw
vise.
NOTICE:
Be careful not to damage the differential drive
pinion.
(c) Using a socket wrench, remove the lock nut.
3. REMOVE CYLINDRICAL ROLLER BEARING RACE
INNER
(a) Using SST, remove the cylindrical roller bearing
race inner.
SST 09950-00020, 09950-00030, 09950-60010
(09951-00320, 09957-04010)
D003686E01
D003687E02
D025609E02
D003689E01

AX–256U151E AUTOMATIC TRANSAXLE – UNDERDRIVE PLANETARY GEAR
AX
4. REMOVE UNDERDRIVE PLANETARY GEAR
ASSEMBLY
(a) Using SST and a press, remove the differential drive
pinion, parking lock gear, counter driven gear with
underdrive planetary ring gear and radial ball
bearing front.
SST 09950-60010 (09951-00320), 09387-00050,
09950-00020, 09950-00030, 09950-40011
(09957-04010)
(b) Place the underdrive planetary gear in a soft jaw
vise.
(c) Using SST, remove the radial ball bearing rear from
the underdrive planetary gear.
SST 09950-60010 (09951-00320), 09950-00030,
09950-40011 (09957-04010)
5. REMOVE UNDERDRIVE PLANETARY RING GEAR
(a) Using a snap ring pliers, remove the snap ring.
(b) Remove the underdrive planetary ring gear from the
counter driven gear.
INSPECTION
1. INSPECT UNDERDRIVE PLANETARY GEAR
PRELOAD
(a) Using SST, fix the underdrive planetary gear
assembly.
SST 09387-00050
D026437E01
D003691E01
D003826E01
D003827E02
D025593E01

U151E AUTOMATIC TRANSAXLE – UNDERDRIVE PLANETARY GEARAX–259
AX
3. INSTALL DIFFERENTIAL DRIVE PINION
(a) Using SST and a press, press the differential drive
pinion.
SST 09726-40010, 09950-60010 (09951-00260),
09950-70010 (09951-07100)
NOTICE:
Press the counter driven gear while rotating it.
4. INSTALL CYLINDRICAL ROLLER BEARING RACE
INNER
(a) Using SST and a press, press the cylindrical roller
bearing race inner.
SST 09506-35010, 09950-60010 (09951-00260),
09950-70010 (09951-07100)
NOTICE:
Press the counter driven gear while rotating it.
5. INSTALL FRONT PLANETARY GEAR NUT
(a) Place the underdrive planetary gear in a soft jaw
vise.
NOTICE:
Be careful not to damage the differential drive
pinion.
(b) Using a socket wrench, install a new lock nut.
Torque: 280 N*m (2,885 kgf*cm, 207 ft.*lbf)
HINT:
Use a torque wrench with a fulcrum length of 750
mm (29.53 in.).
(c) Using a pin punch and hammer, stake the lock nut.
CAUTION:
Be sure that there are no cracks on the nut.
6. INSPECT UNDERDRIVE PLANETARY GEAR
PRELOAD
HINT:
(See page AX-256)
D026434E01
D026432E01
D025609E02
C056809