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Home >> Mazda >> 1990 >> RX-7 Base, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Overhaul - N4A-El, N4A-Hl & NC4A-El >> Component Disassembly & Reassembly >> Od Case & Drum Support >> Disassembly

Od Case & Drum Support: Disassembly

  1. Match mark OD case to drum support. Remove bolts retaining drum support to OD case. Remove drum support from OD case. Using a punch, remove OD cancel valve roll pin. Tap pin out from side opposite contacting face. Remove OD cancel valve and spring. On N4A-HL transmission, ensure cancel valve spring free length is .906" (23.00 mm).
  2. On all transmissions, remove accumulator snap ring. Apply compressed air to oil passage and remove accumulator plug, piston and pring. See Figure . Ensure accumulator spring free length is about 1.560" (39.70 mm) on N4A-HL and 1.590" (40.40 mm) on N4A-EL.
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