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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (Automatic Transmission -- G37 Coupe) >> Periodic Maintenance >> A/T Fluid Cooler >> Cleaning >> Cleaning Procedure

Cleaning Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Position an oil pan under the A/T inlet and outlet cooler hoses.
  2. Identify the inlet and outlet fluid cooler hoses.
  3. Disconnect the A/T fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or by-pass valve.
    NOTE: Replace the cooler hoses if rubber material from the hose remains on the tube fitting.
  4. Allow any ATF that remains in the cooler hoses to drain into the oil pan.
    Fig 1: Illustrating Draining Cooler Hoses ATF Into Oil Pan
    G07173884Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler outlet hose.
    CAUTION:
    • Wear safety glasses and rubber gloves when spraying the Transmission Cooler Cleaner.
    • Spray Transmission Cooler Cleaner only with adequate ventilation.
    • Avoid contact with eyes and skin.
    • Never breathe vapors or spray mist.
      Fig 2: Spraying Transmission Cooler Cleaner To Cooler Outlet Hose
      G07173885Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Hold the hose and can as high as possible and spray Transmission Cooler Cleaner in a continuous stream into the cooler outlet hose until ATF flows out of the cooler inlet hose for 5 seconds.
  7. Insert the tip of an air gun into the end of the cooler outlet hose.
  8. Wrap a shop rag around the air gun tip and of the cooler outlet hose.
  9. Blow compressed air regulated to 5 to 9 kg/cm2 (71 to 128 psi) through the cooler outlet hose for 10 seconds to force out any remaining ATF.
  10. Repeat steps  5 through  9 three additional times.
  11. Position an oil pan under the banjo bolts that connect the A/T fluid cooler steel lines to the A/T.
  12. Remove the banjo bolts.
  13. Flush each steel line from the cooler side back toward the A/T by spraying Transmission Cooler Cleaner in a continuous stream for 5 seconds.
    Fig 3: Blowing Compressed Air Into Cooler Outlet Hose
    G07173886Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Blow compressed air regulated to 5 to 9 kg/cm2 (71 to 128 psi) through each steel line from the cooler side back toward the A/T for 10 seconds to force out any remaining ATF.
  15. Ensure all debris is removed from the steel cooler lines.
  16. Ensure all debris is removed from the banjo bolts and fittings.
  17. Perform "DIAGNOSIS PROCEDURE".
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