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Home >> Mazda >> 2002 >> MX-5 Miata LS, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - Overhaul >> Automatic Transmission >> Automatic Transmission Disassembly >> Disassembly Procedure

Disassembly Procedure

  1. Remove the torque converter, and immediately turn it so that the hole faces upward. This will help to keep any remaining fluid from spilling.
  2. Remove the throttle cable cramp.
  3. Remove the transmission control lever.
  4. Remove the staking of the lock washer, using the screwdriver.
  5. Remove the nut, lock washer, and packing.
  6. Remove the bolt.
  7. Remove the transmission range switch.
    Fig 1: Removing Transmission Range Switch
    G03186830Courtesy of MAZDA MOTORS CORP.
  8. Remove the lock bolt.
  9. Remove the elbow.
  10. Remove the O-ring from the elbow.
  11. Remove the bolt and output speed sensor.
    Fig 2: Removing Output Speed Sensor
    G03186831Courtesy of MAZDA MOTORS CORP.
  12. Remove the O-ring from the output speed sensor.
  13. Remove the bolt and input/turbine speed sensor.
    Fig 3: Removing Input/Turbine Speed Sensor
    G03186832Courtesy of MAZDA MOTORS CORP.
  14. Remove the O-ring from the input/turbine speed sensor.
  15. Remove the breather hose.
  16. Remove the extension housing and gasket.
    Fig 4: Removing Extension Housing & Gasket
    G03186833Courtesy of MAZDA MOTORS CORP.
  17. Remove the C-ring and then remove the speed sensor rotor.
    Fig 5: Removing Speed Sensor Rotor
    G03186834Courtesy of MAZDA MOTORS CORP.
  18. Remove the bolts.
  19. Remove the oil pump by using the puller.
    Fig 6: Removing Oil Pump
    G03186835Courtesy of MAZDA MOTORS CORP.
  20. Remove the bearing at the rear of oil pump.
  21. Remove the bolts.
  22. Holding input shaft by hand, remove the converter housing.
  23. Inspect the dimensions of 4GR case surface and clutch cylinder surface for reassembly.
    Fig 7: Inspecting Dimensions Of 4GR Case Surface & Clutch Cylinder Surface
    G03186836Courtesy of MAZDA MOTORS CORP.
  24. Remove the 4GR clutch component by holding input shaft.
  25. Remove the 4GR case, bearing and bearing race.
  26. Remove the oil pan.

    Examine any material found in the pan or on the magnet to determine the condition of the transmission.

    If large amounts of material are found, replace the torque converter and carefully inspect the transmission for the cause.

    1. Clutch facing material.
      • Drive plate wear.
    2. Steel (magnetic).
      • Bearing, gear, and driven plate wear.
    3. Aluminum (nonmagnetic).
      • Aluminum part wear.

    27. CAUTION:
    • To prevent deforming of the tube, remove the tube by pulling both ends up.
    Fig 8: Removing Tube
    G03186837Courtesy of MAZDA MOTORS CORP.
  27. Remove the tube.
  28. Disconnect the shift solenoid A, B, and torque converter clutch solenoid valve connector.
  29. Remove the oil strainer.
    Fig 9: Removing Oil Strainer
    G03186838Courtesy of MAZDA MOTORS CORP.
  30. Remove the control valve body installation bolts.
  31. Lift control valve body and disconnect throttle cable from the throttle valve cam.
  32. Remove the control valve body.
    Fig 10: Removing Control Valve Body
    G03186839Courtesy of MAZDA MOTORS CORP.
  33. Remove the throttle cable from the transmission case by using the 10 mm {0.4 in}  socket wrench.
    Fig 11: Removing Throttle Cable
    G03186840Courtesy of MAZDA MOTORS CORP.
  34. Remove the accumulator piston from the transmission case by applying compressed air through the fluid passage.

    Air Pressure 

    390 kPa {4.0 kgf/cm 2  , 57 psi} max. 

    Fig 12: Removing Accumulator Piston
    G03186841Courtesy of MAZDA MOTORS CORP.
    35. NOTE:
    • To prevent transmission case from getting damaged, protect its contacting surface with stand by using rags or the like.
    • A stand of such size as shown in figure will facilitate work.
    Fig 13: Placing Transmission Upright
    G03186842Courtesy of MAZDA MOTORS CORP.
  35. Place transmission upright as shown in the figure.
  36. Inspect top surface level of forward clutch against case for reassembly.
    Fig 14: Inspecting Top Surface Level Of Forward Clutch Against Case
    G03186843Courtesy of MAZDA MOTORS CORP.
  37. Remove the forward clutch.
  38. Remove the direct clutch.
  39. Remove the parking rod and parking pawl.
    Fig 15: Removing Parking Rod & Parking Pawl
    G03186844Courtesy of MAZDA MOTORS CORP.
  40. Remove the bolts from valve body side to remove the center support.
    Fig 16: Removing Bolts From Valve Body Side
    G03186845Courtesy of MAZDA MOTORS CORP.
  41. Remove the center support component.
    Fig 17: Removing Center Support Component
    G03186846Courtesy of MAZDA MOTORS CORP.
  42. Remove the retaining ring, planetary gear component and leaf spring.
  43. Remove the brake applying cover.
    Fig 18: Removing Brake Applying Cover
    G03186847Courtesy of MAZDA MOTORS CORP.
  44. Undo caulking of sleeve cover by using the pin punch and move sleeve cover.
    Fig 19: Removing Sleeve Cover
    G03186848Courtesy of MAZDA MOTORS CORP.
  45. Using a pin punch, drive out roll pin, pull out manual shift shaft and remove manual shift lever. Then remove sleeve cover from manual shift lever.
    Fig 20: Removing Pin Punch
    G03186849Courtesy of MAZDA MOTORS CORP.
  46. Remove oil seal from both sides of transmission case.
    Fig 21: Removing Oil Seal
    G03186850Courtesy of MAZDA MOTORS CORP.
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