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Home >> GMC >> 2003 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Servicing >> Lubrication >> Checking Fluid Condition
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Checking Fluid Condition

  1. Check the fluid color. Is the fluid red in color? If so, go to step  5. If not, go to next step.
  2. Is the fluid a non-transparent pink in color? If so, go to step  14. If not, go to next step.
  3. Is the fluid a light brown in color? If so, go to step  5. If not, go to next step.
    NOTE: Fluid may turn a dark brown in color from normal use. This does not always indicate an oxidation or a contamination issue.
  4. Is the fluid black in color and or have a "burnt" smell? If so, go to step  14. If not, go to next step.
  5. Does the fluid appear as a solid "liquid" and not "foamy" or full of bubbles on level indicator? If so, go to next step. If not, go to step  12.
  6. Check the fluid level. Proper level should be in middle of the "X" pattern, on level indicator. Is the level okay? If so, go to step  19. If not, go to next step.
  7. Is the fluid level high on indicator? If so, go to step  12. If not, go to next step.
  8. Is the fluid level low on indicator? If so, go to next step. If not, go to step  4.
  9. Check for any external leak or leaks. See SYMPTOM DIAGNOSIS under TROUBLE SHOOTING in appropriate DIAGNOSIS article. Did you find an external leak or leaks? If so, go to next step. If not, go to step  11.
  10. Correct leak or leaks as needed. Are any leak or leaks still present? If so, go to step  9. If not, go to next step.
  11. Add fluid until level is in middle of "X" pattern on the level indicator. Is the level okay? If so, go to step  19. If not, go to step  6.
  12. Drain fluid until level is in middle of "X" pattern on the level indicator. Is level okay? If so, go to step  19. If not, go to step  6.
  13. Replace oil cooler and flush lines. Is the replacement complete? If so, go to step  15.
  14. Drain fluid and remove oil pan to inspect. Is there sign or signs of internal component damage noted in bottom of transmission oil pan? If so, go to step  16. If not, go to step  13.
    NOTE: A small amount of "friction" material in pan bottom is a "normal" condition, but large pieces and or metal particles will require complete transmission overhaul.
  15. Replace the filter and fluid. See DRAINING & REFILLING . Is the replacement complete? If so, go to step  6.
  16. Flush oil cooler and lines. See OIL COOLER FLUSHING & FLOW CHECK . Is the Automatic Transmission Oil Cooler Flushing and Flow Test complete? If so, go to next step.
  17. Overhaul transmission. See appropriate OVERHAUL article. Is transmission overhaul complete? If so, go to next step.
  18. Add new fluid. See RECOMMENDED FLUIDS . Is the procedure complete? If so, go to step  6.
  19. Check the fluid level and correct as necessary. See FLUID CAPACITIES . Is the fluid level satisfactory? If so, system is okay. If not, go to step  1.
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