CAUTION: Since the automatic transmission consists of a number of precision manufactured parts, these parts must be handled with extreme care during disassembly and assembly.
When disassembling the automatic transmission, the following conditions must be met:
- Place a rubber mat on your workbench and keep it clean at all times.
- Do not use fabric gloves or rags during disassembly. If necessary, use nylon products or paper napkins.
- All removed parts must be completely cleaned.
- Clean the clutch disc, plastic and rubber parts using automatic transmission fluid, carefully ensuring that no dust, dirt, etc. remains on them.
Clean the gearbox surface.
Install the gearbox on the tier with the oil pan facing down.
Remove the torque converter.
Measuring the input shaft end play (1) before disassembly will usually determine whether the thrust washer needs to be replaced (except when replacing major components).
Remove pulse generators A and B (1, 2).
Remove the manual control lever (1), then remove the gearbox switch (2).
Remove the snap ring (1) and the downshift servo switch (2) (see figure).
After removing the oil pan and its gasket, remove the oil filter from the control valve body.
Loosen the oil temperature sensor bolt (1). Push it out from the connector side.
Squeeze the tabs of the solenoid valve wiring seal ring and then push it into the housing.
Loosen the bolts and remove the valve body.
Remove the end sleeve.
Remove the end sleeve shaft.
After unscrewing the bolts, remove the torque converter housing.
Loosen the oil pump mounting bolts. Screw the special tools into the two removable holes of the oil pump housing. Simultaneously and evenly rotate both pullers and remove the oil pump.
Remove the spacer sleeve (1) and the differential.
Remove the input shaft by moving it upwards, then remove the front and rear couplings.
Remove the clutch hub thrust bearing, thrust ring and bearing.
Remove the drum of the forced downshift servo mechanism.
Using the tools, move the servo mechanism inward and remove the snap ring.
Remove the servo piston and spring.
Attach the fixture to the center support. Hold the handle of the tool and pull the center support upward.
The article is based on data from the website (MITSUBISHIMAN)
Remove the reverse and forward gears together.
Remove the planetary carrier and thrust bearing.
Remove the wave spring, return spring, brake disc, brake plate and brake support plate.
Using the tool, release the intermediate shaft.
Remove it and the 2 gear bearing parts.
Remove the internal gear, output flange, intermediate gear and bearing from the housing as a single unit.
Remove the transmission shaft cover.
Loosen the lock nut.
CAUTION: The lock nut has left-hand threads.
Knock out the transfer shaft towards the torque converter housing.
Using the tools, remove the bearing from the transmission shaft, the bearing from the drive gear of the transmission shaft, and the outer ring of the transmission shaft bearing.
Loosen the two bolts and remove the spacer rod (1).
Loosen the locking screw and remove the manual control shaft (1). Remove the ball (2), socket (3) and spring (4).
ATTENTION: Further disassembly of the automatic transmission is not recommended for persons who do not have experience in repairing automatic transmissions. Below are the automatic transmission units in disassembled form.
Assembly
CAUTION: Do not reuse gaskets, seals and rubber parts, replace them with new ones. Apply automatic transmission fluid to all rubbing elements before installation.
Assembly is carried out in reverse order using special tools and devices.
Front clutch (clutch)
1 - retaining ring; 2 - reactive plate; 3 - clutch disc; 4 - return spring; 5 - front clutch piston; 6 - Front clutch holder; 7 - ring; 8 - retaining ring.
Rear clutch (clutch)
1 - seal; 2 - rear clutch holder; 3 - rear clutch piston; 4 - seal; 3 - wave spring; 6 - seal; 7 - return spring; 8 - clutch pressure plate; 9 - clutch disc; 10 - clutch plate; 11 - reaction plate; 12 - retaining ring; 13 - input shaft.
Final clutch (coupling)
1 - reaction plate; 2 - clutch disc; 3 - clutch plate; 4 - piston; 3 - return spring; 6 - oil seal; 7 - end sleeve holder.
Elements of planetary gear
1 - satellite axis; 2 - overrunning clutch; 3 - outer ring; 4 - roller; 5 - wide satellite; 6 - planetary gear knee support; 7 - spacer ring; 8 - thrust bearing; 9 - narrow satellite.
Differential elements
1 - ball bearing; 2 - differential housing; 3 - spacer washer; 4 - washer; 3 - satellite; 6 - satellite axis; 7 - locking pin; 8 - satellite; 9 - washer; 10 - axle gears; 11 - spacer washer; 12 - driving gear.
Valve body elements
1 - pressure reducing valve; 2 - pressure reducing valve spring; 3 - torque converter control valve; 4 - torque converter control valve spring; 3 - control valve; 6 - spring of the adjusting valve; 7 - adjusting screw; 8 - stopper plate; 9 - Shift control valve plate; 10 - shift control valve spring; 11 - rear clutch release valve spring; 12 - exhaust valve B of the rear clutch; 13 - exhaust valve A of the rear clutch; 14 - 2-3 and 3-4 gear shift valve; 15 - 2-3 and 3-4 gear shift valve spring; 16 - end front cover; 17 - valve stop; 18 - Upper separator plate; 19 - steel ball; 20 - pressure reducing valve spring; 21 - intermediate plate; 22 - nut; 23 - nozzles; 24 - oil filter; 25 - lower separator plate; 26 - lower valve body; 27 - pressure reducing valve; 28 - pressure reducing valve spring; 29 - adjusting screw; 30 - end cap; 31 - ND control valve; 32 - ND control valve spring; 33 - damping clutch control valve spring; 34 - damping clutch control valve; 35 - damping clutch control valve sleeve; 36 - end coupling valve; 37 - end sleeve valve spring; 38 - piston of the end coupling valve; 39 - stopper; 40 - pin; 41 - mounting sleeve; 42 - block; 43 - tube; 44 - pressure control solenoid valve; 45 - Solenoid valve B for switching control; 46 - Solenoid valve A for switching control; 47 - damping clutch control solenoid valve; 48 - 1-2 switching valve; 49 - 1-2 shift valve spring; 50 - rear end cap; 51 - shift control valve cover; 52 - locking plate; 53 - piston B of the switching control valve; 54 - ND shift control valve bushing; 55 - ND switching control valve; 56 - manual control valve; 57 - Upper valve body; 58 - Teflon ball; 59 - ND switching control valve plate.
Arrangement of valves in the upper housing
1 - switching control valve; 2 - piston B of the switching control valve; 3 - piston B of the exhaust valve of the rear clutch; 4 - 1-2 gear shift valve; 3 - 2-3 and 3-4 gear shift valve; 6 - piston A of the exhaust valve of the rear clutch; 7 - piston A of the shift control valve; 8 - adjusting screw; 9 - control valve; 10 - torque converter control valve; 11 - pressure control valve; 12 - ND control valve; 13 - ND control valve bushing; 14 - manual control valve.
Location of valves in the lower housing
1 - pressure reducing valve; 2 - adjustment pin; 3 - ND control and accumulation valve; 4 - damping clutch control valve sleeve; 5 - damping clutch control valve 6 - stopper; 7 - piston of the end coupling valve; 8 - end coupling valve.