Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Transmission Unit: Disassembly
- REMOVE TRANSMISSION CONTROL SHAFT LEVER LH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the nut, washer and control shaft lever LH.
- REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY
- Using a screwdriver, pry out the lock washer.
- Remove the nut, lock washer and bolt.
- Remove the park/neutral position switch.
- REMOVE OIL COOLER TUBE UNION
- Remove the 2 oil cooler tube unions.
- Remove the O-ring from the oil cooler tube union.
- REMOVE SPEED SENSOR
- Remove the 2 bolts and 2 speed sensors.
- Remove the O-ring from each sensor.
- REMOVE AUTOMATIC TRANSAXLE BREATHER TUBE
- Remove the 2 bolts.
- Remove the breather tube.
- Remove the O-ring from each tube.
- REMOVE AUTOMATIC TRANSMISSION HOUSING
- Remove the 10 bolts.
- Remove the transmission housing.
- REMOVE TRANSMISSION CASE ADAPTER SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the 8 bolts.
- Remove the transmission case adapter assembly.
HINT:
Use a brass bar and a hammer to remove the extension housing assembly.
- Remove the gasket from the transmission case adapter sub-assembly.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- REMOVE TRANSMISSION CASE ADAPTER OIL SEAL
- Using a screwdriver, pry out the oil seal.
- FIX AUTOMATIC TRANSMISSION CASE SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Install the transmission case on the overhaul attachment.
- REMOVE AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY NOTE: Do not turn the transmission over as this will contaminate the valve body with foreign matter on the bottom of the pan.
- Remove the drain plug and 20 bolts.
- INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY (See INSPECTION )
- REMOVE VALVE BODY OIL STRAINER ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Turn over the transmission.
- Remove the 4 bolts holding the valve body oil strainer assembly to the valve body.
- Remove the O-ring form the valve body oil strainer assembly.
- REMOVE TRANSMISSION WIRE
- Remove the ATF temperature sensor.
- Remove the bolt and clamp.
- Disconnect the 7 connectors from the shift solenoid valves.
- Remove the bolt from the case.
- Pull the transmission wire out of the transmission case.
- Remove the O-ring from the transmission wire.
- REMOVE TRANSMISSION VALVE BODY ASSEMBLY
- Remove the 19 bolts.
- Remove the valve body assembly.
- REMOVE TRANSAXLE CASE GASKET
- Remove the 3 transaxle case gaskets.
- REMOVE BRAKE DRUM GASKET
- Remove the 3 brake drum gaskets.
- REMOVE CHECK BALL BODY
- Remove the check ball body and spring.
- REMOVE C-2 ACCUMULATOR PISTON
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Applying compressed air to the oil hole, and remove the C2 accumulator piston and spring.
- Remove the 2 O-rings from the piston.
NOTE: Be careful as the C-3 and B-3 accumulator piston may jump out. - REMOVE B-3 ACCUMULATOR PISTON
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Applying compressed air to the oil hole, and remove the B3 accumulator piston and spring.
- Remove the 2 O-rings from the piston.
NOTE: Be careful as the C-3 accumulator piston may jump out. - REMOVE C-3 ACCUMULATOR PISTON
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Applying compressed air to the oil hole, and remove the C3 accumulator piston and 2 spring.
- Remove the 2 O-rings from the piston.
- REMOVE C-1 ACCUMULATOR VALVE
- Remove the C-1 accumulator valve and 2 springs.
- REMOVE PARKING LOCK PAWL BRACKET
- Remove the 3 bolts and parking lock pawl bracket.
- REMOVE PARKING LOCK ROD SUB-ASSEMBLY
- Disconnect the parking lock rod from the manual valve lever.
- REMOVE PARKING LOCK PAWL SHAFT
- Pull out the parking lock pawl shaft from the front side, and then remove the lock pawl and spring.
- Remove the E-ring from the shaft.
- REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a hammer and screwdriver, cut off the spacer and remove it from the shaft.
- Using a pin punch and hammer, tap out the spring pin.
HINT:
Slowly drive out the spring pin so that it does not fall into the transmission case.
- Pull the manual valve lever shaft out through the case, and remove the manual valve lever.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- REMOVE MANUAL VALVE LEVER SHAFT OIL SEAL
- Using a screwdriver, remove the 2 oil seals.
- REMOVE OIL PUMP ASSEMBLY
- Remove the 10 bolts holding the oil pump from the transmission case.
- Using SST, remove the oil pump.
SST 09350-30020 (09350-07020)
- Remove the No. 1 thrust bearing race from the front oil pump.
- REMOVE CLUTCH DRUM AND INPUT SHAFT ASSEMBLY
- Remove the clutch drum and input shaft drum assembly from the transmission case.
- Remove the clutch drum thrust washer and thrust needle roller bearing.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- INSPECT NO. 2 ONE-WAY CLUTCH ASSEMBLY (See INSPECTION )
- REMOVE NO. 2 ONE-WAY CLUTCH ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the No. 2 one-way clutch assembly and No. 2 clutch drum thrust washer from the clutch drum and input shaft assembly.
- REMOVE NO. 3 BRAKE SNAP RING
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a screwdriver, remove the No. 3 brake snap ring from the case.
- REMOVE NO. 3 BRAKE DISC
- Remove the flange and cushion plate the 4 discs and the 4 plates from the case.
- INSPECT NO. 3 BRAKE DISC (See INSPECTION )
- REMOVE 2ND BRAKE PISTON HOLE SNAP RING
- Using SST, remove the snap ring.
SST 09350-30020 (09350-07060)
- REMOVE ONE-WAY CLUTCH ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the one-way clutch assembly and the No. 1 planetary carrier thrust washer from the case.
- REMOVE 2ND BRAKE CYLINDER
- Remove the 2nd brake cylinder from the case.
- REMOVE 2ND BRAKE PISTON
- Using SST and a press, remove the snap ring.
SST 09351-40010
- Hold the 2nd brake piston and apply compressed air (392 kPa, 4.0 kgf/cm2 , 57 psi) to the 2nd brake cylinder to remove the 2nd brake piston.
- Remove the 2 O-rings from the 2nd brake piston.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using SST and a press, remove the snap ring.
- INSPECT NO. 3 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY (See INSPECTION )
- REMOVE FRONT PLANETARY GEAR ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the front planetary gear assembly and the one-way clutch inner race from the case.
- Remove the thrust needle roller bearing, the No. 3 thrust bearing race and the No. 2 planetary carrier thrust washer from the front planetary gear assembly.
Fig 42: Identifying Thrust Needle Roller Bearing, No. 3 Thrust Bearing Race & No. 2 Planetary Carrier Thrust WasherCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- INSPECT FRONT PLANETARY GEAR ASSEMBLY (See INSPECTION )
- INSPECT ONE-WAY CLUTCH ASSEMBLY (See INSPECTION )
- REMOVE FRONT PLANETARY RING GEAR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the front planetary ring gear and bearing from the transmission case.
- REMOVE CENTER PLANETARY RING GEAR
- Using a screwdriver, remove the snap ring.
- Remove the center planetary ring gear and front planetary ring gear flange from the front planetary ring gear.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- REMOVE NO. 1 BRAKE DISC
- Remove the flange, 3 discs and 3 plates from the case.
- INSPECT NO. 1 BRAKE DISC (See INSPECTION )
- REMOVE BRAKE PISTON RETURN SPRING SNAP RING
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a screwdriver, remove the brake piston return spring snap ring from the case.
- REMOVE BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the brake piston return spring and No. 1 the brake piston with the No. 1 brake cylinder from the transmission case.
- INSPECT BRAKE PISTON RETURN SPRING SUB-ASSEMBLY (See INSPECTION )
- REMOVE NO. 1 BRAKE PISTON
- Hold the No. 1 brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the No. 1 brake piston.
HINT:
If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.
- Remove the 2 O-rings from the No. 1 brake piston.
- Hold the No. 1 brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the No. 1 brake piston.
- REMOVE NO. 2 BRAKE DISC
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a screwdriver, remove the snap ring from the case.
- Remove the flange, the brake piston return spring, the 3 discs and the 3 plates from the case.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- INSPECT NO. 2 BRAKE DISC (See INSPECTION )
- INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY (See INSPECTION )
- REMOVE NO. 2 BRAKE PISTON
- Hold the No. 2 brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the No. 2 brake piston.
HINT:
If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.
- Remove the 2 O-rings from the No. 2 brake piston.
- Hold the No. 2 brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the No. 2 brake piston.
- REMOVE CENTER PLANETARY GEAR ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the center planetary gear assembly, the planetary sun gear and the No. 4 thrust bearing race from the case.
- INSPECT CENTER PLANETARY GEAR ASSEMBLY (See INSPECTION )
- REMOVE INTERMEDIATE SHAFT
- Using a screwdriver, remove the snap ring from the case.
- Remove the intermediate shaft with the No. 3 one way clutch assembly from the case.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- INSPECT NO. 3 ONE-WAY CLUTCH ASSEMBLY (See INSPECTION )
- REMOVE NO. 3 ONE-WAY CLUTCH ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the No. 3 one-way clutch assembly and the one-way clutch inner race from the intermediate shaft.
- REMOVE REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY Fig 57: Identifying No. 8 Thrust Bearing Race, Thrust Needle Roller Bearing, No. 7 Thrust Bearing Race & Planetary Ring Gear Flange
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the No. 8 thrust bearing race, thrust needle roller bearing, the No. 7 thrust bearing race and the planetary ring gear flange from the intermediate shaft.
- INSPECT REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY (See INSPECTION )
- INSPECT INTERMEDIATE SHAFT (See INSPECTION )
- REMOVE BRAKE PLATE STOPPER SPRING
- Remove the brake plate stopper spring from the case.
- REMOVE NO. 4 BRAKE DISC
- Remove the 7 plates, the 8 discs and the 2 flanges from the case.
- INSPECT NO. 4 BRAKE DISC (See INSPECTION )
- REMOVE REAR PLANETARY GEAR ASSEMBLY
- Remove the rear planetary gear assembly from the case.
- Remove the No. 9 thrust bearing race and the thrust needle roller bearing from the rear planetary gear assembly.
- Remove the thrust needle roller bearing from the case.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- INSPECT REAR PLANETARY GEAR ASSEMBLY (See INSPECTION )
- REMOVE 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY
- Place SST on the spring retainer and compress the brake return spring.
SST 09350-30020 (09350-07050)
- Using SST, remove the snap ring and the brake return spring.
SST 09350-30020 (09350-07070)
- Place SST on the spring retainer and compress the brake return spring.
- INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY (See INSPECTION )
- REMOVE 1ST AND REVERSE BRAKE PISTON
- Hold the 1st and reverse brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the 1st and reverse brake piston.
HINT:
If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.
- Remove the O-ring from 1st and reverse brake piston.
- Hold the 1st and reverse brake piston and apply compressed air (392 kPa, 4 kgf/cm2
, 57 psi) to the transmission case to remove the 1st and reverse brake piston.
- REMOVE BRAKE REACTION SLEEVE
- Using SST, remove the reaction sleeve.
SST 09350-30020 (09350-07080)
- Remove the O-ring from the reaction sleeve.
- Using SST, remove the reaction sleeve.
- REMOVE NO. 4 BRAKE PISTON
- Using SST, remove the No. 4 brake piston.
SST 09350-30020 (09350-07090)
- Remove the 2 O-rings from the No. 4 piston.
- Using SST, remove the No. 4 brake piston.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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