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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Automatic Transmission - 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> Fluid Leak Diagnosis >> Powder Method

Powder Method

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION:

    Do not clean using brake cleaner or other reactive solvents as these solvents can damage rubber gaskets, seals and bushings.

  1. Thoroughly clean the suspected leak area using a rag.
  2. Apply an aerosol type powder, such as foot powder, to the suspected leak area.
    3. NOTE:

    Do not idle vehicle, this will not actuate transmission systems, and do not drive the vehicle on the freeway as this will splatter oil inhibiting leak diagnosis.

  3. Operate the vehicle for 15 - 20 minutes under city driving conditions until normal operating temperatures are reached.
  4. Shut OFF the engine.
  5. Inspect the suspected leak area.
  6. Trace the leak path through the powder in order to find the source of the leak.
  7. Make the necessary repairs.
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