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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> Basic Inspection >> A/T Fluid Cooler >> Cleaning >> Cleaning Procedure

Cleaning Procedure

  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: Positioning Oil Pan Under A/T Inlet And Outlet Cooler Hoses
    G07013494Courtesy of NISSAN NORTH AMERICA, INC.
  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 breath vapors or spray mist.
    Fig 2: Cleaning Transmission Cooler
    G07013495Courtesy of NISSAN NORTH AMERICA, INC.
  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.
    Fig 3: Blowing Regulated Compressed Air Into Cooler Outlet Hose
    G05726768Courtesy of NISSAN NORTH AMERICA, INC.
  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.
  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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