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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 466 (Automatic Transmission (Re5R05A)) >> Basic Inspection >> A/T Fluid Cooler >> 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 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Position a drain pan under the A/T inlet and outlet fluid cooler tube to cooler hose connection.
  2. Put a different color matching mark on each cooler tube to cooler hose connection to aid in assembly.
    CAUTION: Use paint to make the matching mark. Do not damage the tubes or hose.
  3. Disconnect the fluid cooler inlet and outlet rubber hoses from the steel cooler tubes.
    G04075393Courtesy of NISSAN NORTH AMERICA, INC.
    NOTE: Replace the cooler hoses if rubber material from the hose remains on the tube fitting.
  4. Drain any A/T fluid from the cooler hose.
  5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner into the cooler outlet hose.
    G04075394Courtesy of NISSAN NORTH AMERICA, INC.
    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.
    G04075395Courtesy of NISSAN NORTH AMERICA, INC.
  8. Wrap a shop rag around the tip of the air gun and the cooler outlet hose.
  9. Blow compressed air regulated to 490 - 883 kPa (5 - 9 kg/cm 2 , 71 - 128 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 tubes 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 490 - 883 kPa (5 - 9 kg/cm 2 , 71 - 128 psi) through each steel line from the cooler side back toward the A/T 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.
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