2007 TOYOTA SIENNA Service Repair Manual

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  SECOND BRAKE PISTONAX–243
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REASSEMBLY
1. INSTALL 2ND BRAKE PISTON O-RING
(a) Coat 2 new O-rings with ATF, and install them in the 
2nd brake piston.
NOTICE:
Make su

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE UNITAX–181
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DISASSEMBLY
1. REMOVE PARK/NEUTRAL POSITION SWITCH 
ASSEMBLY
(a) Remove the nut, washer and control shaft lever.
(b) Using a screwdr

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TOYOTA SIENNA 2007  Service Repair Manual AX–182U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE UNIT
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5. REMOVE SPEED SENSOR
(a) Remove the 2 bolts and the 2 speed sensors from 
the transaxle assembly.
6. REMOVE TRANSAXLE CASE NO.1 PL

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE UNITAX–183
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9. INSPECT TRANSMISSION OIL CLEANER MAGNET
(a) Remove the magnets and use them to collect any 
steel chips. Examine the chips and pa

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13. REMOVE TRANSMISSION VALVE BODY ASSEMBLY
(a) Support the valve body assembly and remove the 
17 bolts and valve body assembly.
14

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE UNITAX–185
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18. REMOVE C-3 ACCUMULATOR PISTON
(a) Remove the spring from the C-3 accumulator 
piston.
(b) Apply compressed air (392 kPa, 4.0 kgf

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20. REMOVE B-3 ACCUMULATOR PISTON
(a) Apply compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi) 
to the oil hole and remove the B-3 accum

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24. REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY
(a) Using a chisel and hammer, cut off and remove the 
spacer.
(b) Using a pin punch (
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