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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Automatic Transaxle (Service, Removal & Installation AY6A-El)) >> B1 Brake Piston Cover Removal/Installation

B1 Brake Piston Cover Removal/Installation

WARNING: This page is about a different variant/trim than selected.
  1. Drain the ATF. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT .)
  2. Remove the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
  3. Remove the TCM.
    Fig 1: Identifying TCM And TCM Installation Bolts
    G08143112
    CAUTION:
    • Do not touch the terminals.
      Fig 2: Caution - Do Not Touch Terminals
      G08143113
  4. Inspect the condition of the connector pin of the coupler component (foreign material, bent pins, broken pins) and O-ring after the TCM is removed.
    Fig 3: Identifying Connector Pin And O-Ring
    G08143114
  5. Remove the O-ring from the coupler component.
    Fig 4: Identifying O-Ring And Coupler Component
    G08143115
  6. Clean the transaxle. (See AUTOMATIC TRANSAXLE CLEANING .)
  7. Remove the torque converter. (See TORQUE CONVERTER REMOVAL/INSTALLATION .)
  8. Remove the stud bolts.
    Fig 5: Identifying Stud Bolts
    G08143116
  9. Set the SSTs  as shown in the figure.
    Fig 6: Installing SST To Transaxle
    G08143117
    CAUTION:
    • When installing the SST to the transaxle, use bolts (M12x1.25) with a thread length of 90 mm {3.5 in}.
  10. Install the SST  to the position where the transaxle stud bolts were removed.
    Fig 7: Identifying SST Installation Position
    G08143118
  11. Remove the oil pipe component and O-rings.
    Fig 8: Oil Pipe Component, O-Ring And Bolts With Torque Specifications
    G08143119
  12. Refer to the "Automatic Transaxle Disassembly/assembly Precaution" before disassembling/assembling the transaxle. (See AUTOMATIC TRANSAXLE DISASSEMBLY/ASSEMBLY PRECAUTION .)
  13. Remove the control valve body cover.
    Fig 9: Locating Control Valve Body Cover Bolts
    G08143120
  14. Using a plastic hammer, tap the control valve body cover to remove it.
    Fig 10: Tapping Control Valve Body Cover Using Plastic Hammer
    G08143121
    CAUTION:
    • Do not damage the fitting surface of the transaxle case and the control valve body cover.
    • Do not deform the control valve body cover.
    NOTE:
    • Disconnect the solenoid connector according to the following procedure:
      • Insert a precision flathead screwdriver from the backside into the connector as shown in the figure.
        Fig 11: Inserting Flathead Screwdriver From Backside Into Connector
        G08143122
    CAUTION:
    • Do not damage the solenoid valves and connectors with the flathead screwdriver.
    • Pry the flathead screwdriver in the direction of the arrow and disconnect the connector.
      Fig 12: Disconnecting Connector Using Flathead Screwdriver
      G08143123
    CAUTION:
    • When disconnecting connectors, grasp the connectors, not the wiring harnesses. Otherwise, the wiring harnesses may be pulled out of the connector causing poor contact.
  15. Disconnect the solenoid connectors, VSS connector and the input/turbine speed sensor connector.
    Fig 13: Locating Solenoid Connectors, VSS Connector And Input/Turbine Speed Sensor Connector
    G08143124
  16. Disconnect the coupler component from the clamp.
    Fig 14: Identifying Coupler Component Clamp
    G08143125
  17. Remove the lock plate, and pull out the TFT sensor from the control valve body.
    Fig 15: Identifying Lock Plate And TFT Sensor
    G08143126
  18. Remove the VSS connector from the solenoid clamp.
    Fig 16: Identifying VSS Connector And Solenoid Clamp
    G08143127
  19. Remove the suction cover and the gasket.
    Fig 17: Identifying Suction Cover And Gasket With Bolts
    G08143128
  20. Remove the control valve body installation bolts in the order shown in the figure.
    Fig 18: Locating Control Valve Body Installation Bolts Loosening Sequence
    G08143129
  21. Disconnect the manual valve link and remove the control valve body component.
    Fig 19: Identifying Manual Valve Link
    G08143130
    CAUTION:
    • Do not drop the control valve body component.
  22. Fix the coupler component with tape to the transaxle case as shown in the figure.
    Fig 20: Locating Coupler Component And Tape
    G08143131
    NOTE:
    • Be sure to secure the coupler component with tape so that it will not interfere with the control valve body component.
  23. Fix the VSS wiring harness with tape to the transaxle case as shown in the figure.
    Fig 21: Identifying Tape And VSS Wiring Harness
    G08143132
    NOTE:
    • Be sure to secure the VSS with tape so that they will not interfere with the control valve body component.
  24. Remove the converter housing. (See CONVERTER HOUSING REMOVAL/INSTALLATION .)
  25. Remove the oil pump component and oil strainer as a single unit. (See OIL PUMP REMOVAL/INSTALLATION .)
  26. Remove the C3 clutch component, front planetary gear component and input shaft.
    Fig 22: Identifying C3 Clutch Component, Front Planetary Gear Component And Input Shaft
    G08143133
    NOTE:
    • In some cases, the input shaft may be detached with the thrust bearing attached.
  27. Remove the C3 clutch component from the front planetary gear component and input shaft.
    Fig 23: Identifying C3 Clutch Component, Front Planetary Gear Component And Input Shaft
    G08143134
    NOTE:
    • In some cases, the C3 clutch component may be detached with the thrust washer attached.
  28. Remove the brake band anchor bolt.
    Fig 24: Identifying Brake Band Anchor Bolt
    G08143135
  29. Remove the B1 brake band.
    Fig 25: Identifying B1 Brake Band
    G08143136
  30. Affix the brake piston cover using the SST  .
    Fig 26: Brake Piston Cover And SST
    G08143137
  31. Remove the snap ring using snap ring pliers.
    Fig 27: Removing Snap Ring Using Snap Ring Pliers
    G08143138
    CAUTION:
    • The brake piston cover will fly off due to the force of the piston return spring.
  32. Remove the brake piston cover, B1 brake piston and the piston return spring.
    Fig 28: Identifying Brake Piston Cover, B1 Brake Piston And Piston Return Spring
    G08143139
    CAUTION:
    • Do not drop the brake piston cover.
    • Do not drop the B1 brake piston.
  33. Remove the O-rings from the brake piston cover.
    Fig 29: Identifying O-Rings And Brake Piston Cover
    G08143140
  34. Install the front planetary gear component and input shaft to the transaxle case.
    Fig 30: Identifying C1 Clutch Component, Front Planetary Gear Component And Input Shaft
    G08143141
    CAUTION:
    • If the input shaft is not hold during installation, the thrust washer might be come off.
    NOTE:
    • Align the spline of the C1 clutch component before installing the front planetary gear component and input shaft.
    • Hold the C1 clutch component and install the front planetary gear component while holding the input shaft.
  35. Apply ATF to the bushing of the C3 clutch component.
  36. Install the C3 clutch component to the transaxle case.
    Fig 31: Identifying C3 Clutch Component And Sun Gear Input Drum
    G08143142
    NOTE:
    • Before installing the C3 clutch component, align the spline of the C3 clutch component and the spline of the sun gear input drum.
    NOTE:
    • Install the C3 clutch component so that it engages with the sun gear input drum as shown in the figure.
      Fig 32: Identifying C3 Clutch Component And Sun Gear Input Drum
      G08143143
  37. Install the B1 brake band to the transaxle case.
    Fig 33: Identifying B1 Brake Band
    G08143144
  38. Install the brake band anchor bolt to the transaxle case.
    Fig 34: Identifying Brake Band Anchor Bolt
    G08143145

    Tightening torque 

    • 134-199 N.m {14-20 kgf.m, 99-146 ft.lbf}
  39. Apply ATF to the new O-rings.
  40. Install the O-rings to the brake piston cover.
    Fig 35: Identifying O-Rings And Brake Piston Cover
    G08143146
  41. Install the piston return spring, B1 brake piston and the brake piston cover to the transaxle case.
    Fig 36: Identifying Piston Return Spring, B1 Brake Piston And Brake Piston Cover
    G08143147
  42. Press the brake piston cover into the position where the snap ring groove is visible using the SST  .
    Fig 37: Pressing Brake Piston Cover Into Position Using SST
    G08143148
  43. Install the snap ring using snap ring pliers.
    Fig 38: Installing Snap Ring Using Snap Ring Pliers
    G08143149
  44. Install the oil pump component and oil strainer as a single unit. (See OIL PUMP REMOVAL/INSTALLATION .)
  45. Install the converter housing. (See CONVERTER HOUSING REMOVAL/INSTALLATION .)
  46. Connect the manual valve link and install the control valve body component.
    Fig 39: Identifying Manual Valve Link And Wiring Harness Clamp
    G08143150
    CAUTION:
    • When installing the control valve body component, secure the coupler component to the wiring harness clamp.
    • Do not pinch the coupler component between the transaxle case and the control valve body component.
  47. Temporarily install the control valve body component with the bolts.
    Fig 40: Locating Control Valve Body Component Bolts
    G08143151
    NOTE:
    • Aligning the bolt holes, temporarily tighten the bolt by hand.

    Bolt length (measured from below the head) 

    • A: 21 mm {0.83 in}
    • B: 31 mm {1.2 in}
  48. Temporarily install the suction cover and a new gasket with the bolts.
    Fig 41: Identifying Suction Cover And Gasket With Bolts
    G08143152
    NOTE:
    • Aligning the bolt holes, temporarily tighten the bolt by hand.
  49. Tighten the bolts in the order shown in the figure.
    Fig 42: Locating Control Valve Body Component Bolts
    G08143153

    Tightening torque 

    • 8-12 N.m {82-122 kgf.cm, 71-106 in.lbf}
  50. Install the connector of the VSS to the solenoid clamp.
    Fig 43: Identifying VSS Connector And Solenoid Clamp
    G08143154
  51. Install the TFT sensor with the lock plate and a bolt to the control valve body component as shown in the figure.
    Fig 44: Identifying TFT Sensor And Lock Plate
    G08143155

    Tightening torque 

    • 6.0-8.0 N.m {62-81 kgf.cm, 54-70 in.lbf}
  52. Connect the solenoid connectors, VSS connector and the input/turbine speed sensor connector.
    Fig 45: Locating Solenoid Connectors, VSS Connector And Input/Turbine Speed Sensor Connector
    G08143156
  53. Connect the coupler component to the clamps.
    Fig 46: Identifying Coupler Component Clamps
    G08143157
  54. Clean sealant and oil off the contact surface of the transaxle case with the control valve body cover and the bolt holes.
    Fig 47: Identifying Sealant And Oil Application Area On Contact Surface Of Transaxle Case
    G08143158
    NOTE:
    • Completely remove sealant and oil with white gasoline or similar.
  55. Clean oil off the contact surface of the new control valve body cover with the transaxle case.
  56. Apply sealant to the new control valve body cover as shown in the figure.
    Fig 48: Identifying Sealant Application Area On Control Valve Body Cover
    G08143159
  57. Install the new control valve body cover with new seal bolts before the applied sealant starts to harden.
    Fig 49: Locating Control Valve Body Cover With Seal Bolts
    G08143160
    CAUTION:
    • Be careful that the coupler component will not become caught between the control valve body cover and transaxle case.

    Tightening torque 

    • 10-15 N.m {102-152 kgf.cm, 89-132 in.lbf}
  58. Install the oil pipe component and O-rings.
    Fig 50: Oil Pipe Component, O-Ring And Bolts With Torque Specifications
    G08143161
  59. Install a new O-ring to the coupler component.
    Fig 51: Identifying O-Ring And Coupler Component
    G08143162
    CAUTION:
    • Do not apply ATF to the O-ring.
  60. Align the transaxle case and coupler component connector.
    Fig 52: Aligning Transaxle Case And Coupler Component Connector
    G08143163
  61. Be sure to match the position of the TCM marking.
    Fig 53: Identifying TCM Marking Match Position
    G08143164
    CAUTION:
    • Do not turn more than 60° from the marking.
  62. Install the TCM.
  63. Verify the correct positioning of the TCM and coupler component.
    Fig 54: Locating TCM And Coupler Component
    G08143165
  64. Tighten the TCM installation bolts.
    Fig 55: Identifying TCM And Installation Bolts
    G08143166

    Tightening torque 

    • 20-29 N.m {2.1-2.9 kgf.m, 15-21 ft.lbf}
  65. Remove the SSTs  .
    Fig 56: Removing SSTs
    G08143167
  66. Install the stud bolts using double nutted.
    Fig 57: Identifying Stud Bolts
    G08143168
    CAUTION:
    • Do not repair the threads using a tap or other tools.
    • Do not damage the transaxle case.
    • Do not overtighten the stud bolts. (The stud bolts should remain protruded from the end of the transaxle case more than 47 mm {1.9 in}.)
    • If any of the stud bolts is overtightened, the transaxle case may be damaged (holes in the case may result).
    • If the transaxle case is damaged, the transaxle must be replaced.
  67. Remove the double nutted from the stud bolts.
  68. Install the torque converter. (See TORQUE CONVERTER REMOVAL/INSTALLATION .)
  69. Install the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
  70. Add ATF. (See AUTOMATIC TRANSAXLE FLUID (ATF) LEVEL ADJUSTMENT .)
  71. Perform the "Neutral Position Learning". (See TCM NEUTRAL POSITION LEARNING .)
  72. Adjust the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) LEVEL ADJUSTMENT .)
  73. Perform the "Mechanical System Test". (See MECHANICAL SYSTEM TEST .)
  74. Perform the "Road Test". (See ROAD TEST .)
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