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Home >> Mazda >> 2001 >> MPV ES >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul >> Low And Reverse Brake Assembly >> Assembly Procedure

Assembly Procedure

  1. Apply ATF to the new inner and outer seals, and install them onto the low and reverse brake piston.

    Seal Ring Inner Diameter: 

    1. Inner Seal: 156.5 mm {6.161 in} 
    2. Outer Seal: 1S8.0 mm {7.402 in} 

  2. Face the outer seal lip toward the inside by gently rolling it down around the circumference for easier installation into the case.
    Fig 1: Installing Outer Seal Lip
    G03186206
  3. Install the low and reverse brake piston by pushing evenly around the circumference, being careful not to damage the outer seal.
  4. Install the spring and retainer component.
  5. Install the SSTs  in the transaxle case as shown.
    CAUTION:
    • Depress the spring retainer and retainer component only enough to install the snap ring. Overpressing will damage the assembly edges.
  6. Compress the spring and retainer.
    Fig 2: Compressing Spring & Retainer
    G03186207
  7. Install the snap ring.
  8. Remove the SSTs  .
  9. Install the wave spring with the buff finish downward.
  10. Install the drive and driven plates in the following order.

    Driven-Drive-Driven-Drive-Driven-Drive-Driven-Drive 

    Fig 3: Installing Drive & Driven Plates
    G03186208
  11. Install the retaining plate.
  12. Install the snap ring.
  13. Measure the clearance between the low and reverse brake retaining plate and the snap ring. Make several measurements and calculate the average value.
    • If the clearance is not within the specification, adjust it by selecting a proper plate from below.

    Low And Reverse Brake Clearance 

    1. 1.5-1.8 mm {0.06-0.07 in} 

    Retaining Plate Sizes 

    LOW AND REVERSE BRAKE RETAINING PLATE SIZES (mm {in})

    7.0 {0.276} 7.2 {0.283} 7.4 {0.291}
    7.6 {0.299} 6.8 {0.268} -
    WARNING:
    • Using compressed air can cause dirt and other particles to fly out, causing injury to the eyes. Wear protective eye wear whenever using compressed air.
    CAUTION:
    • Applying compressed air to the assembled clutch pack for longer than 3 seconds at a time will damage the seal. Do not apply compressed air for more than the aforementioned time when testing the system.
  14. Inspect the low and reverse brake operation by applying compressed air through the fluid passage as shown in the figure.

    Air Pressure: 

    1. 390 kPa {4.0 kgf/cm 2  , 57 psi} max. 

    Fig 4: Inspecting Low & Reverse Brake Operation
    G03186209