Automatic Transmission Unit Disassembly
Reference: AUTOMATIC TRANSMISSION ASSEMBLY DISMOUNTING AND REMOUNTING
- Keep component parts in group for each subassembly and avoid mixing them up.
- Clean all parts with cleaning solvent thoroughly and air dry them.
- Use kerosene or automatic transmission fluid as cleaning solvent.
- Do not use wiping cloths or rags to clean or dry parts.
- All oil passages should be blown out and checked to make sure that they are not obstructed.
- Keep face and eyes away from solvent spray while air blowing parts.
- Check mating surface for irregularities and remove them, if any, and clean it again.
- Soak new clutch discs and brake discs in transmission fluid for at least 2 hours before assembly.
- Replace all gaskets and O-rings with new ones.
- Apply automatic transmission fluid to all O-rings.
- When installing seal ring, be careful so that it is not expanded excessively, extruded or caught.
- Replace oil seals that are removed and apply grease to their lips.
- Before installing, be sure to apply automatic transmission fluid to sliding, rolling and thrusting surface of all component parts. Also after installation, make sure to check each part for proper operation.
- Always use torque wrench when tightening bolts.
- Extract torque converter (1) from transmission.CAUTION:
Remove torque converter as much straight as possible.
Leaning it may cause to damage oil seal lip.
- Remove breather pipe (1) from transmission.
- Remove output shaft speed sensor (1) and input shaft speed sensor (2).
- Remove the nut, the washer and manual select lever (1).
- Unbend bend parts of lock washer (1) and then remove manual shift shaft nut (2), lock washer and grommet.
- Remove transmission range sensor (3) by removing sensor bolt.
- Remove oil cooler pipes (1) from transmission.
- Remove converter housing (1) by removing 10 bolts.
- Remove transmission case adapter (1) by removing 8 bolts.
- Remove oil pan bolts (1).
- Remove oil pan and oil pan gasket from transmission case.
- Remove the 4 magnets (1) and clean them to steel particles etc.
- Remove oil strainer (1) from valve body assembly.
- Remove transmission fluid temperature sensor (1) from sensor clamp (2).
- Remove wire harness clamp (3).
- Disconnect the following connectors from shift solenoid-A, shift solenoid-B, shift solenoid-E, TCC solenoid, pressure control solenoid-A, pressure control solenoid-B and pressure control solenoid-C.
- After removing bolt (1) pull out transmission wire connector (2) from transmission case.CAUTION:
When pulling transmission wire harness out of transmission case, take care not to damage connectors and transmission fluid temperature sensor at narrow exist of case.
- Remove spring plate (1) and manual shift lever spring (2).
- Remove valve body assembly (3) by removing 19 bolts.
- Remove check ball body (1) and spring (2).
- Remove transmission case gaskets (1).
- Remove brake drum gaskets (1) from transmission case.
- Remove direct clutch accumulator piston (1) by compressed air (392 kPa, 4.0 kg/cm2
, 57 psi) into hole (2).NOTE:
Cover accumulator piston (1) with shop cloth while blowing because A/T fluid should be spattered.
- Remove direct clutch accumulator piston spring from transmission case.
- Remove 2nd (No.3) brake accumulator piston (1) by compressed air (392 kPa, 4.0 kg/cm2
, 57 psi) into hole (2).NOTE:
Cover accumulator piston (1) with shop cloth while blowing because A/T fluid should be spattered.
- Remove 2nd (No.3) brake accumulator piston spring from transmission case.
- Remove reverse clutch accumulator piston (1) by compressed air (392 kPa, 4.0 kg/cm2
, 57 psi) into hole (2).NOTE:
Cover accumulator piston (1) with shop cloth while blowing because A/T fluid should be spattered.
- Remove reverse clutch accumulator piston springs from transmission case.
- Remove forward clutch accumulator piston (1).
- Remove forward clutch accumulator piston springs from transmission case.
- Remove parking pawl bracket (1).
- Remove parking lock rod (2) from manual shift lever (1).
- Pull out parking pawl pin (1) to oil pump side and then remove parking lock pawl (2) and parking pawl spring (3).
- Remove manual shift shaft and lever as follows.
- Undo caulking of sleeve cover (1) by using flat end rod or the like and hammer.
- Drive out manual shift lever pin (1) by using special tool and hammer.
Special Tool
(A): 09922-89810
- Pull out manual shift shaft (2) from transmission case, and then remove manual shift lever (3) and sleeve cover (4).
- Remove 2 manual shift shaft oil seals (1) from transmission case by using flat end rod or the like.
- Place transmission on stand facing oil pump upward.NOTE:
- To prevent transmission case from getting damaged, protect its contacting surface with stand by using shop cloth or the like.
- A stand of such size as shown in the figure will facilitate work.
- After removing oil pump bolts, remove oil pump assembly (1) by using special tool.
Special Tool
- 09927-66520
- 09920-13120
- Remove thrust bearing race No.1 (1) and thrust bearing race No.10 (2) from oil pump assembly.
- Remove clutch drum and input shaft assembly (1) from transmission case.
- Remove clutch hub thrust washer (1) and thrust needle roller bearing No.1 (2) and thrust needle roller bearing (3) from clutch drum and input shaft assembly.
- Remove one-way No.2 clutch assembly (1) and clutch drum thrust washer No.2 (2) from clutch drum & input shaft assembly.
- Remove snap ring (1) by using flat end rod or the like.
- Remove 2nd (No.3) brake flange "F", 2nd (No.3) brake discs "D", 2nd (No.3) brake plates "P" and 2nd (No.3) brake cushion plate (1) from transmission case.
- Remove snap ring (1) by using special tool.
Special Tool
(A): 09900-06108
- Remove one-way No.1 clutch assembly (1) and planetary carrier thrust washer No.1 (2) from transmission case.
- Remove 2nd (No.3) brake piston (1) including 2nd (No.3) brake cylinder (2) from transmission case.
- Compress 2nd (No.3) brake return spring (1) until 2nd (No.3) brake return spring is lowered to the place 1 - 2 mm (0.039 - 0.078 in.) from the snap ring groove by using special tool and then remove snap ring (2).CAUTION:
Be careful when applying pressure, for overpressure will cause 2nd (No.3) brake return spring to deform.
Special Tool
(A): 09927-66540
- Remove 2nd (No.3) brake piston from 2nd (No.3) brake cylinder (1) by applying compressed air (392 kPa, 4.0 kg/cm2 , 57 psi) into oil hole (2) of 2nd (No.3) brake cylinder (1).
- Remove front planetary gear assembly (1) and one-way No.1 clutch inner race (2) from transmission case.
- Remove thrust needle roller bearing (1), thrust bearing race No.3 (2) and planetary carrier thrust washer No.2 (3) from transmission case.
- Remove front planetary ring gear assembly (1) and thrust needle roller bearing (2) from transmission case.
- Remove snap ring (1) by using flat end rod or the like.
- Remove middle planetary ring gear (1) and front planetary ring gear flange (2) from front planetary ring gear.
- Remove No.1 brake flange "F", No.1 brake discs "D" and No.1 brake plates "P" from transmission case.
- Remove snap ring (1) by using flat end rod or the like.
- Remove No.1 brake piston return spring (1) and No.1 brake piston (2) from transmission case.
- Remove No.1 brake piston from No.1 brake piston cylinder (1) by applying compressed air (392 kPa, 4.0 kg/cm2 , 57 psi) into oil hole (2) of No.1 brake piston cylinder (1) as shown in figure.
- Remove O-ring from No.1 brake piston.
- Remove snap ring (1) by using flat end rod or the like.
- Remove No.2 brake flange "F", No.2 brake piston return spring (1), No.2 brake discs "D" and No.2 brake plates "P" from transmission case.
- Remove No.2 brake cylinder including No.2 brake piston (1) by applying compressed air (392 kPa, 4.0 kg/cm2 , 57 psi) into oil hole (2) of transmission case.
- Remove No.2 brake piston (1) from No.2 brake cylinder (2).
- Remove middle planetary gear assembly (1), planetary sun gear (2) and thrust bearing race No.4 (3) from transmission case.
- Remove snap ring (1) by using special tool.
Special Tool
(A): 09900-06108
- Remove intermediate shaft (1) and one-way No.3 clutch assembly (2) from transmission case.
- Remove one-way No.3 clutch assembly (1) and one-way No.3 clutch inner race (2) from intermediate shaft.
- Remove thrust bearing race No.8 (1), thrust needle roller bearing (2), thrust bearing race No.7 (3) and planetary ring gear flange assembly (4) from intermediate shaft.
- Remove snap ring (1) by using flat end rod or the like.
- Remove rear planetary ring gear flange (1) from rear planetary ring gear (2).
- Remove brake plate stopper spring (1) from transmission case.
- Remove 1st & reverse (No.4) brake flange (1) from transmission case.-145
- Remove 1st & reverse (No.4) brake plates "P" and 1st & reverse (No.4) brake discs "D" from transmission case.
- Remove 1st & reverse (No.4) brake flange "F" from transmission case.
- Remove rear planetary gear assembly (1) from transmission case.
- Remove thrust bearing race No.9 (1) and thrust needle roller bearing (2) from rear planetary gear assembly.
- Remove thrust needle roller bearing (1) from transmission case.
- Compress 1st & reverse (No.4) brake return spring (2) until the 1st & reverse (No.4) return spring is lowered to the place 1 - 2 mm (0.039 - 0.078 in.) from the snap ring groove by using special tool and then remove snap ring (1).CAUTION:
Be careful when applying pressure, for overpressure will cause plate section of 1st & reverse (No.4) return spring to deform.
Special Tool
(A): 09922-86010
- Remove 1st & reverse (No.4) brake return spring (1).
- Remove 1st & reverse (No.4) brake piston (1) by applying compressed air (392 kPa, 4.0 kg/cm2 , 57 psi) into oil hole (2) of transmission case.
- Remove O-ring from 1st & reverse (No.4) brake piston (1).
- Remove brake reaction sleeve (1) by using special tools.
Special Tool
(A): 09920-20310
- Remove 1st & reverse brake inner piston (1) by using special tools.
Special Tool
(A): 09920-20310