Mitsubishi Galant/Mirage/Diamante 1990-2000

Automatic Transaxle Assembly

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REMOVAL & INSTALLATION



Diamante
  1. Properly disarm the SRS system (air bag). Refer to .
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Remove the front wheels.
  6.  
  7. Remove the engine side cover and undercovers.
  8.  
  9. Drain the transaxle assembly into a suitable container.
  10.  
  11. If equipped, remove the front catalytic converter.
  12.  
  13. Remove the exhaust pipe, main muffler and catalytic converter.
  14.  
  15. Disconnect the tie rod end and ball joint from the steering knuckle.
  16.  
  17. Unbolt the support bearing for the left side halfshaft.
  18.  
  19. Remove the halfshafts by inserting a prybar between the transaxle case and the driveshaft and prying the shaft from the transaxle.
  20.  
  21. Remove the air cleaner assembly and adjoining duct work.
  22.  
  23. Detach the engine harness connection.
  24.  
  25. If the vehicle is equipped with Active Electronic Controlled Suspension (Active-ECS), remove the compressor assembly from the transaxle and suspend with wire. Do not allow the compressor to hang from the air hose.
  26.  
  27. If equipped, remove the roll stopper stay bracket.
  28.  
  29. Disconnect the speedometer cable from the transaxle.
  30.  
  31. Remove the clip that secures the shifter and disconnect the shifter control cable from the transaxle.
  32.  
  33. Disconnect and plug the oil cooler hoses from the transaxle.
  34.  
  35. Detach the following:
  36.  
  37. Park/neutral switch electrical harness
  38.  
  39. Kickdown servo switch
  40.  
  41. Pulse generator
  42.  
  43. Oil temperature sensor electrical harness
  44.  
  45. Shift control solenoid valve harness.
  46.  
  47. Support the transaxle and remove the transaxle mounting bracket.
  48.  
  49. Remove the three upper transaxle-to-engine mounting bolts.
  50.  



Click image to see an enlarged view

Fig. Location of 4-wheel steering oil pump mounting bolts-Diamante with a F4A33 automatic transaxle

  1. For vehicles with 4WS, remove the heat shield for the 4WS oil pump and remove the pump. Do not allow the pump to hang from the oil hoses.
  2.  
  3. For vehicles equipped with Active-ECS, disconnect the height sensor rod from the lower control arm.
  4.  
  5. Remove the bolt that secures the Heated Oxygen (HO 2 S) sensor harness to the right side crossmember.
  6.  
  7. Remove the starter assembly.
  8.  
  9. Remove the mounting brackets for access to the bell housing cover.
  10.  
  11. Remove the bell housing/oil pan covers assembly.
  12.  
  13. Remove the bolts holding the flexplate to the torque converter.
  14.  
  15. Remove the lower transaxle to engine bolts and remove the transaxle assembly.
  16.  



Click image to see an enlarged view

Fig. Transaxle removal (1 of 2)-Diamante with F4A51 transaxle



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Fig. Transaxle removal (2 of 2)-Diamante with F4A51 transaxle

To install:

  1. Install the transaxle assembly to the engine block, install the mounting bolts and tighten to 54 ft. lbs. (75 Nm).
  2.  
  3. Install the bolts that secure the torque converter to the driveplate. Tighten the bolts to 34-38 ft. lbs. (46-53 Nm).
  4.  
  5. Install the bell housing/oil pan covers.
  6.  
  7. Install the transaxle stay brackets that were removed for access to the bell housing cover.
  8.  
  9. Install the starter assembly and connect the wiring.
  10.  
  11. Install the bolt that secures the HO 2 S sensor harness to the right side crossmember and tighten the bolt to 7-9 ft. lbs. (10-12 Nm).
  12.  
  13. For vehicles equipped with Active-ECS, connect the height sensor rod from the lower control arm. Check the height sensor rod for a length (A) of 10.59-10.63 in. (269-270mm).
  14.  



Click image to see an enlarged view

Fig. Height sensor rod adjustment-Diamante with a F4A33 automatic transaxle

  1. If removed, install the 4WS oil pump and tighten the mounting bolts to 17 ft. lbs. (24 Nm).
  2.  
  3. If removed, install the 4WS oil pump heat shield and tighten the mounting bolts to 17 ft. lbs. (24 Nm).
  4.  
  5. Install the three upper transaxle-to-engine mounting bolts. Tighten the mounting bolts to 54 ft. lbs. (75 Nm).
  6.  


NOTE
One of the upper bolts has a grounding strap to secure under the bolt.

  1. Install and connect the transaxle mounting bracket. Tighten the mounting nut and bolts to 51 ft. lbs. (70 Nm).
  2.  
  3. Connect the shift control solenoid valve harness.
  4.  
  5. Connect the kickdown servo switch, pulse generator and oil temperature sensor electrical harness.
  6.  
  7. Connect the park/neutral switch electrical harness.
  8.  
  9. Using new hose clamps, install the oil cooler hoses to the transaxle.
  10.  
  11. Install shifter control cable to the transaxle and secure the cable with clip.
  12.  
  13. Connect the speedometer cable to the transaxle.
  14.  
  15. If removed, install the roll stopper stay bracket and tighten the one through nut and bolt to 36-43 ft. lbs. (50-60 Nm). Tighten the two mounting bolts to 16 ft. lbs. (22 Nm).
  16.  
  17. If removed, install the Active-ECS compressor assembly. Tighten the mounting bolts to 48 inch lbs. (5 Nm) and connect the electrical harness.
  18.  
  19. Attach the engine harness connection.
  20.  
  21. Install the air cleaner assembly and adjoining duct work.
  22.  
  23. Using new circlips, install the halfshafts and seat halfshafts into the transaxle. Install the bolt that secure the left side support bearing and tighten the bolts to 33 ft. lbs. (45 Nm).
  24.  
  25. Connect the ball joint and tie rod end to the steering knuckle. Using new nuts, tighten the ball joint castle nut to 43-52 ft. lbs. (60-72 Nm) and tighten the tie rod castle nut to 22 ft. lbs. (30 Nm). Install new cotter pins.
  26.  
  27. Using new gaskets, install the exhaust system.
  28.  
  29. If removed, install front catalytic converter.
  30.  
  31. Install the engine undercovers.
  32.  
  33. Connect the negative battery cable.
  34.  
  35. Fill the transaxle to the correct level.
  36.  
  37. Start the engine and check for leaks.
  38.  

Galant
1990-93 MODELS
  1. On vehicles equipped with auto-cruise, remove the control actuator and bracket.
  2.  
  3. If equipped with an active ECS, disconnect the air compressor.
  4.  
  5. Drain the transaxle fluid into a suitable container.
  6.  
  7. Remove the air cleaner assembly, intercooler and air hose, as required.
  8.  
  9. Mark the shift cable. Remove the adjusting nut and disconnect the shift cable.
  10.  
  11. Tag and detach the electrical connectors for the solenoid, neutral safety switch (inhibitor switch), the pulse generator kickdown servo switch and oil temperature sensor.
  12.  
  13. Disconnect the speedometer cable and oil cooler lines.
  14.  
  15. Disconnect the wires to the starter motor and remove the starter.
  16.  
  17. Remove the upper transaxle to engine bolts.
  18.  
  19. Support the transaxle and remove the transaxle mounting bracket.
  20.  
  21. Raise the vehicle and support safely. Remove the sheet metal under guard.
  22.  
  23. Remove the tie rod ends and the ball joints from the steering knuckle.
  24.  
  25. Remove the halfshafts by inserting a prybar between the transaxle case and the driveshaft and prying the shaft from the transaxle. Do not pull on the driveshaft. Doing so damages the inboard joint. Use the prybar. Do not insert the prybar so far the oil seal in the case is damaged. Tie the halfshafts aside.
  26.  
  27. On AWD vehicles, disconnect the exhaust pipe and remove the transfer case.
  28.  
  29. Remove the lower bellhousing cover and remove the special bolts holding the flexplate to the torque converter. To remove, turn the engine crankshaft with a box wrench and bring the bolts into a position appropriate for removal, one at a time. After removing the bolts, push the torque converter toward the transaxle so it doesn't stay on the engine allowing oil to pour out the converter hub or cause damage to the converter.
  30.  
  31. Remove the lower transaxle to engine bolts and remove the transaxle assembly.
  32.  

To install:

  1. After the torque converter has been mounted on the transaxle, install the transaxle assembly on the engine. Tighten the driveplate bolts to 34-38 ft. lbs. (46-53 Nm). Tighten the transaxle-to-engine bolts to 35 ft. lbs. (48 Nm). Install the bellhousing cover.
  2.  
  3. On AWD vehicles, install the transfer case and frame pieces. Connect the exhaust pipe using a new gasket.
  4.  
  5. Replace the circlips and install the halfshafts to the transaxle.
  6.  
  7. Install the tie rods and ball joint to the steering arm.
  8.  
  9. Install the transaxle mounting bracket.
  10.  
  11. Install the under guard.
  12.  
  13. Install the starter.
  14.  
  15. Connect the speedometer cable and oil cooler lines.
  16.  
  17. Connect the solenoid, neutral safety switch (inhibitor switch), the pulse generator kickdown servo switch and oil temperature sensor.
  18.  
  19. Install the shift control cable.
  20.  
  21. Install the air hose, intercooler and air cleaner assembly.
  22.  
  23. If equipped with an active ECS, connect the air compressor.
  24.  
  25. If equipped with auto-cruise, install the control actuator and bracket.
  26.  
  27. Refill with Dexron® II, Mopar® ATF Plus type 7176, Mitsubishi Plus ATF or equivalent, automatic transaxle fluid. If vehicle is AWD check and fill the transfer case.
  28.  
  29. Start the engine and allow to idle for 2 minutes. Apply parking brake and move selector through each gear position, ending in N . Recheck fluid level and add if necessary. Fluid level should be between the marks in the HOT range.
  30.  

1994-00 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner and intake hoses.
  4.  
  5. Drain the transaxle into a suitable waste container.
  6.  
  7. Remove the nut securing the shifter lever to the transaxle. Remove the cable retaining clip and remove the cable from the transaxle.
  8.  
  9. Remove the shifter cable mounting bracket.
  10.  
  11. Tag and detach the electrical connectors for the speedometer, solenoid, neutral safety switch (inhibitor switch), the pulse generator, kickdown servo switch, and the oil temperature sensor.
  12.  
  13. Tag and disconnect the oil cooler lines at the transaxle.
  14.  
  15. Remove the bolt securing the fluid dipstick tube to the transaxle. Remove the dipstick and tube from the transaxle.
  16.  
  17. Remove the starter motor and position it aside.
  18.  
  19. Using special tool MZ203827 or equivalent, support the engine assembly.
  20.  
  21. Remove the rear roll stopper mounting bracket.
  22.  
  23. Remove the transaxle mount bracket.
  24.  
  25. Remove the upper transaxle mounting bolts.
  26.  
  27. Raise and safely support the vehicle.
  28.  
  29. Remove the front wheel assemblies.
  30.  
  31. Remove the right hand undercover.
  32.  
  33. Remove and discard the cotter pin, then disconnect the tie rod end from the steering knuckle.
  34.  
  35. Disconnect the stabilizer bar link from the damper fork.
  36.  
  37. Disconnect the damper fork from the lateral lower control arm.
  38.  
  39. Disconnect the lateral lower arm, and the compression arm lower ball joints from the steering knuckle.
  40.  
  41. Pry the halfshafts from the transaxle, and secure aside.
  42.  
  43. Remove the cover from the transaxle bellhousing.
  44.  
  45. Remove the engine front roll stopper through-bolt.
  46.  
  47. Remove the crossmember and the triangular right hand stay.
  48.  
  49. Remove the bolts holding the flexplate to the torque converter with a box wrench. Rotate the engine to bring the bolts into a position appropriate for removal, one at a time. After removing the bolts, push the torque converter toward the transaxle. This will prevent the converter from remaining intact with the engine, possibly damaging the converter.
  50.  
  51. Support the transaxle, using a transmission jack, and remove the transaxle lower coupling bolt.
  52.  


NOTE
The coupling bolt threads from the engine side, into the transaxle, and is located just above the halfshaft opening.

  1. Slide the transaxle rearward and carefully lower it from the vehicle.
  2.  

To install:

  1. After the torque converter has been mounted on the transaxle, install the transaxle assembly to the engine. Install the mounting bolts and tighten to 35 ft. lbs. (48 Nm).
  2.  
  3. Install the transaxle lower coupling bolt and tighten to 21-25 ft. lbs. (29-34 Nm).
  4.  
  5. Connect the torque converter to the flexplate and tighten the bolts to 33-38 ft. lbs. (45-52 Nm).
  6.  
  7. Install the cover to the transaxle bellhousing and tighten the mounting bolts to 7 ft. lbs. (9 Nm).
  8.  
  9. Install the crossmember and tighten the front mounting bolts to 65 ft. lbs. (88 Nm) and the rear bolt to 54 ft. lbs. (73 Nm). Install the front engine roll stopper through-bolt and lightly tighten. Once the full weight of the engine is on the mounts, tighten the bolt to 42 ft. lbs. (57 Nm).
  10.  
  11. Install the triangular stay bracket and tighten the mounting bolts to 65 ft. lbs. (88 Nm).
  12.  
  13. Install the halfshafts, using new circlips on the axle ends.
  14.  


WARNING
When installing the axleshaft, keep the inboard joint straight in relation to the axle, so as not to damage the oil seal lip of the transaxle with the serrated part of the halfshaft.

  1. Connect the tie rod and ball joints to the steering knuckle. Tighten the ball joint self-locking nuts to 48 ft. lbs. (65 Nm). Tighten the tie rod end nut to 21 ft. lbs. (28 Nm) and secure with a new cotter pin.
  2.  
  3. Connect the damper fork to the lower control arm and tighten the through-bolt to 65 ft. lbs. (88 Nm).
  4.  
  5. Connect the stabilizer link to the damper fork, and tighten the self-locking nut to 29 ft. lbs. (39 Nm).
  6.  
  7. Install the undercover.
  8.  
  9. Install the wheels and carefully lower the vehicle.
  10.  
  11. Install the transaxle mount bracket to the transaxle, and tighten the mounting nuts to 32 ft. lbs. (43 Nm).
  12.  
  13. Install the rear roll stopper mounting bracket.
  14.  
  15. Remove the engine support. Tighten the transaxle mount through-bolt to 51 ft. lbs. (69 Nm) and tighten the front engine roll stopper through-bolt.
  16.  
  17. Install the upper transaxle mounting bolts and tighten to 35 ft. lbs. (48 Nm).
  18.  
  19. Install the starter motor.
  20.  
  21. Install the dipstick tube and the dipstick.
  22.  
  23. Install the shifter cable mounting bracket.
  24.  
  25. Connect the shifter lever and tighten the retaining nut to 14 ft. lbs. (19 Nm).
  26.  
  27. Connect the oil cooler lines and secure with clamps.
  28.  
  29. Attach the electrical connectors for the speedometer, solenoid, neutral safety switch (inhibitor switch), the pulse generator, kickdown servo switch and oil temperature sensor.
  30.  
  31. Install the air cleaner and the air intake hose.
  32.  
  33. Connect the negative battery cable.
  34.  
  35. Make sure the vehicle is level, and refill the transaxle. Start the engine and allow to idle for 2 minutes. Apply parking brake and move selector through each gear position, ending in N . Recheck fluid level and add if necessary. Fluid level should be between the marks in the HOT range.
  36.  
  37. Check the transaxle for proper operation. Make sure the reverse lights come on when in reverse and the engine starts only in P or N .
  38.  

Mirage

NOTE
If the vehicle is going to be rolled on its wheels while the halfshafts are out of the vehicle, obtain two outer CV-joints or proper equivalent tools and install to the hubs. If the vehicle is rolled without the proper torque applied to the front wheel bearings, the bearings will no longer be usable.

  1. Disconnect the negative battery cable then the positive battery cable.
  2.  
  3. Remove the battery and battery tray.
  4.  
  5. Remove the air hose and air cleaner assembly.
  6.  
  7. Raise the vehicle and support safely.
  8.  
  9. Remove the under guard pan.
  10.  
  11. Drain the transaxle oil into a suitable container.
  12.  
  13. If equipped with 1.6L engine, remove the tension rod.
  14.  
  15. Disconnect the control cable and cooler lines.
  16.  
  17. On 3-speed transaxles, disconnect the throttle control cable.
  18.  
  19. On 4-speed transaxles, perform the following:
  20.  

  1. Detach the shift control solenoid valve connector.
  2.  
  3. Disconnect the inhibitor switch and kickdown servo switch.
  4.  
  5. Disconnect the pulse generator and oil temperature sensor.
  6.  

  1. Disconnect the speedometer cable and remove the starter.
  2.  
  3. Remove the transaxle mounting bolts and bracket.
  4.  
  5. Disconnect the stabilizer bar from the lower control arm.
  6.  
  7. Disconnect the steering tie rod end and the ball joint from the steering arm.
  8.  
  9. Remove the halfshafts at the inboard side from the transaxle. Tie the joint assembly aside.
  10.  


NOTE
It is not necessary to disconnect the halfshafts from the wheel hubs.

  1. Support the engine and remove the center member.
  2.  
  3. Remove the bellhousing cover and remove the driveplate bolts.
  4.  
  5. Remove the transaxle assembly lower connecting bolt, located just over the halfshaft opening.
  6.  
  7. Properly support the transaxle assembly, then lower it, moving it to the right for clearance.
  8.  

To install:

  1. After the torque converter has been mounted on the transaxle, install the transaxle assembly on the engine. Install the mounting bolts and tighten to 31-40 ft. lbs. (43-55 Nm) on 1990-92 models and 35 ft. lbs. (48 Nm) on 1993-00 models.
  2.  
  3. Tighten the driveplate bolts to 33-38 ft. lbs. (46-53 Nm). Install the bellhousing cover.
  4.  
  5. Install the center member.
  6.  
  7. Replace the circlips and install the halfshafts to the transaxle.
  8.  
  9. Install the tie rods, ball joints and stabilizer links to the steering arm.
  10.  
  11. Install the transaxle mounting bracket and bolts.
  12.  
  13. Install the starter.
  14.  
  15. Connect the speedometer cable.
  16.  
  17. Connect the inhibitor switch, kickdown servo switch, the pulse generator and oil temperature sensor, if disconnected.
  18.  
  19. Connect the shift control solenoid valve connector.
  20.  
  21. Connect the control cables and oil cooler lines.
  22.  
  23. Install the tension rod, if removed.
  24.  
  25. Install the air cleaner assembly.
  26.  
  27. Install the battery tray and battery.
  28.  
  29. Connect the positive then the negative terminal.
  30.  
  31. Refill with Dexron® II, Mopar® ATF Plus type 7176 or equivalent, automatic transaxle fluid.
  32.  
  33. Start the engine and allow to idle for two minutes. Apply parking brake and move selector through each gear position, ending in N . Recheck fluid level and add if necessary. Fluid level should be between the marks in the HOT range.
  34.  

ADJUSTMENTS



Shifter Control Cable Adjustment
  1. The shifter cable adjustment is done at the neutral safety switch (inhibitor switch). Locate the switch on the transaxle and note the alignment holes in the arm and the body of the switch. Place the selector lever in N . Place the manual lever of the transaxle in the neutral position.
  2.  
  3. Check alignment of the hole in the manual control lever to the hole in the inhibitor switch body. If the holes do not align, adjustment is required.
  4.  
  5. To adjust, loosen the nut on the cable end and pull the cable end by hand until the alignment holes match. Tighten the nut. Check that the transaxle shifts and conforms to the positions of the selector lever.
  6.  

Throttle Valve Cable

The throttle valve adjustment applies only to the 1990-96 Mirage.

  1. Place selector lever and manual control lever in N position.
  2.  
  3. Loosen adjusting nut. While lightly pulling on control cable tighten mounting nut to 7-10 ft. lbs. (10-14 Nm).
  4.  
  5. When adjustment is complete, be sure selector lever is still in the N position. Verify all functions correspond to the position indicated on the selector lever.
  6.  

 
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