Automatic Transmission Unit Disassembly
Automatic Transmission Unit DisassemblyCAUTION:
^ 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.
1) Extract torque converter (1). And remove oil filler tube and dipstick.
CAUTION:
Remove torque converter as much straight as possible. Leaning it may cause damage to oil seal lip.
2) Remove input shaft speed sensor (1) and output shaft speed sensor (2).
3) Remove 6 adapter case fixing bolts and then remove adapter case (3) and gasket.
NOTE:
Use care not to cause damage to oil seal.
4) Remove transmission range sensor (1).
5) Remove C-ring (1) and then remove speed sensor rotor (2).
NOTE:
Use care not to loose rotor stop key.
6) Remove oil pump (1) by using special tools.
Special Tool
(A): 09913-65135
(B): 09927-66520
NOTE:
Use care not to cause damage to shaft bushing surface.
7) Remove bearing at the rear of oil pump (1).
8) Remove O-ring from oil pump (1).
9) Holding input shaft (2) by hand, remove converter housing (3).
10) Check dimensions of overdrive (O/D) case (1) surface and clutch cylinder (2) surface for reassembly.
11) Remove overdrive (O/D) clutch assembly by holding input shaft (3).
12) Remove O/D case, bearing and bearing race.
NOTE:
Confirm direction of bearing and bearing race for reassembly.
13) Remove oil pan (1) and oil pan gasket.
Then remove magnets from oil pan and clean them to steel particles etc.
NOTE:
^ Hold oil pan with oil pan side down to prevent foreign material in oil pan from entering valve body.
^ If iron powder is found, it is possible that bearing, gear or clutch plate is worn.
14) Remove oil strainer (1).
15) Remove overdrive (O/D) brake apply tube (1).
16) Disconnect connectors, and then remove solenoid wire harness (2).
17) Remove valve body (1) mounting bolts as shown in figure.
18) Remove accumulator pistons (1) by blowing air into holes (2) as shown in figure.
NOTE:
Hold accumulator piston (1) with nylon cloth while blowing.
19) Place transmission (1) upright as shown in figure.
NOTE:
^ To prevent transmission case from getting damaged, protect its contacting surface with stand by using nylon cloth or the like.
^ A stand of such size as shown in figure will facilitate work.
20) Check top surface level of forward clutch (2) against case (1) for reassembly.
21) Remove forward clutch.
NOTE:
Confirm direction of bearing and bearing race for reassembly.
22) Remove direct clutch (1).
23) Remove pawl bracket (1), and then parking lock rod (2) from manual shift lever.
24) Remove pawl spring (3), pawl pin and parking lock pawl (4).
25) Remove 2 bolts (1) from valve body side.
26) Remove center support assembly (1).
27) Remove retaining ring (1), planetary gear assembly leaf spring, bearing and bearing race.
NOTE:
^ Use care not to cause damage to case when removing retaining ring.
^ Confirm direction of bearing and bearing race for reassembly.
28) Remove apply tube.
29) Remove reverse brake return spring (1) using special tools.
Special Tool
(A): 09941-84510
(B): 09926-98320
30) Remove reverse brake piston (1) by applying compressed air (400 - 800 kPa, 4 - 8 kgf/cm2, 57 - 113 psi) to oil hole (2).
31) Apply compressed air (400 - 800 kPa, 4 - 8 kgf/cm2, 57 - 113 psi) to oil hole (3) to remove brake reaction sleeve (1) and secondary reverse piston (2).
32) Remove brake reaction sleeve (1) and secondary reverse piston (2) by using special tools.
Special Tool
(A): 09920-20310
33) Remove manual shift shaft and lever as follows.
a) Undo caulking of sleeve cover (1) by using flat end rod or the like and hammer.
b) Drive out manual shift lever pin (1) by using special tool and hammer.
Special Tool
(A): 09922-89810
c) Pull out manual shift shaft (2) from transmission case, and then remove manual shift lever (3) and sleeve cover (4).
34) Remove oil seal (1) from both sides of transmission case.
35) Remove cover plate (1).
