Transmission Fluid Inspection

Transmission fluid condition can provide many clues to the nature of the transmission concern. Proper transmission fluid level can only be determined with the transmission fluid within a specified temperature range. It is not necessary to verify exact transmission fluid level at this time. If the transmission fluid is below operating temperature, it is expected to be low on the transmission fluid level indicator. Transmission fluid temperatures below 30.2 deg.F (-1 deg.C) may not show up on a transmission fluid level indicator.

1. With the vehicle in NEUTRAL, position it on a hoist. REFER to: Jacking and Lifting - Overview .
2. Remove the transmission fluid fill plug and transmission fluid level indicator.
3. Allow the transmission fluid to drip onto a facial tissue or white sheet of paper.
4. Examine the stain. Under normal conditions, the fluid color will darken and may develop an odor. Color and odor should not be used to determine the condition of the fluid or transmission.
   • Trace amounts of black or shiny metallic particles may be present from normal wear and operation. Presences of a few particles in the sample do not necessarily indicate a transmission concern.
   • Large quantities of black particles are typically burnt friction material.
   • Large quantities of small to medium sized shiny metallic particles may indicate excessive hard part wear.
   • Foamy pink color indicates either water or engine coolant in the transmission.