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Low-Reverse Brake: Reassembly

    CAUTION: Installing low-reverse brake piston may damage seal. Carefully install low-reverse brake piston by pushing evenly around circumference.
  1. Apply ATF to circumference of low-reverse brake piston seal. Install piston into transaxle case. Install piston return spring and one-way clutch to transaxle case. Compress one-way clutch inner race enough to install snap ring. Install snap ring. Ensure snap ring opening is in correct position. See Fig 2 . Install dish plate. Install drive and driven plates in alternate order, beginning with driven plate. Install retaining plate and snap ring.
  2. Install a dial gauge to low-reverse brake. Set measuring point of dial gauge to low-reverse brake piston. Apply compressed air to low-reverse brake fluid passage and allow low-reverse brake piston to stroke 3 times. Maximum air pressure is 14 psi (1.0 kg/cm2 ).
  3. Apply compressed air and operate low-reverse brake piston. Read value when indicator of dial gauge stops. Release compressed air. Read dial gauge when low-reverse brake piston is not operating. Subtract second value from first value to obtain low-reverse brake clearance.
  4. Repeat step  3 at 4 locations (90 degrees apart). Ensure average value is .087-.098" (2.20-2.50 mm). If clearance is not within specification, remove snap ring and measure thickness. Add snap ring thickness to average low-reverse brake clearance. Select appropriate snap ring to obtain proper clearance. See LOW-REVERSE BRAKE SNAP RING SIZES  table.
  5. Install snap ring and perform steps  2 - 4 . Ensure clearance is within specification.
  6. Apply compressed air to low-reverse brake fluid passage. Ensure air flows through passage.
LOW-REVERSE BRAKE SNAP RING SIZES

Range - In. (mm) Snap Ring Sizes - In. (mm)
.159-.167 (4.05-4.25) .071 (1.80)
.167-.175 (4.25-4.45) .079 (2.00)
.175-.183 (4.45-4.65) .087 (2.20)
.183-.190 (4.65-4.85) .094 (2.40)
.190-.199 (4.85-5.05) .102 (2.60)
.199-.207 (5.05-5.25) .110 (2.80)
.207-.215 (5.25-5.45) .118 (3.00)
Fig 1: Removing Low & Reverse Clutch Piston
G96G04992Courtesy of MAZDA MOTORS CORP.
Fig 2: Identifying Low & Reverse Snap Ring Installation
G00050190Courtesy of MAZDA MOTORS CORP.
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