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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1056 (Automatic Transaxle Overhaul & Diagnostics) >> Re4F04B >> Trouble Diagnosis - Basic Inspection >> A/T Fluid Cooler Cleaning >> A/T Fluid Cooler Cleaning Procedure

A/T Fluid Cooler Cleaning Procedure

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. Position an oil pan under the automatic transaxle's inlet and outlet cooler hoses.
  2. Identify the inlet and outlet fluid cooler hoses.
  3. Disconnect the fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve.
    Fig 1: Disconnecting Fluid Cooler Inlet And Outlet Rubber Hoses From Steel Cooler Tubes Or Bypass Valve
    G00738374Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE: Replace the cooler hoses if rubber material from the hose remains on the tube fitting.
  4. Allow any A/T fluid that remains in the cooler hoses to drain into the oil pan.
  5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler outlet hose.
    Fig 2: Inserting Extension Adapter Hose Of Can Of Transmission Cooler Cleaner Into Cooler Outlet Hose
    G00738375Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • Wear safety glasses and rubber gloves when spraying the Transmission Cooler Cleaner.
    • Spray cooler cleaner only with adequate ventilation.
    • Avoid contact with eyes and skin.
    • Do not breath vapors or spray mist.
  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 fluid 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.
    Fig 3: Inserting Tip Of Air Gun Into End Of Cooler Outlet Hose
    G00738376Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Wrap a shop rag around the air gun tip and of the cooler outlet hose.
  9. Blow compressed air regulated to 5 - 9 kg/cm2 (70 - 130 psi) through the cooler outlet hose for 10 seconds to force out any remaining fluid.
  10. Repeat steps 5 through 9 three additional times.
  11. Position an oil pan under the banjo bolts that connect the fluid cooler steel lines to the transaxle.
  12. Remove the banjo bolts.
  13. Flush each steel line from the cooler side back toward the transaxle by spraying Transmission Cooler Cleaner in a continuous stream for 5 seconds.
  14. Blow compressed air regulated to 5 - 9 kg/cm2 (70 - 130 psi) through each steel line from the cooler side back toward the transaxle for 10 seconds to force out any remaining fluid.
  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 "A/T FLUID COOLER DIAGNOSIS PROCEDURE ".
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