Transmission fluid should be checked:

Transmission fluid should be checked:

• A. Only cold
• B. Only hot
• C. Both hot and cold (cold for fluid, hot for level)
• D. Neither; check weekly

Answer: (C)

Temperature affects both how transmission fluid looks and how the level reads on the dipstick. Do a cold check to assess fluid condition—color, smell, and consistency—without heat expansion, which helps you spot burnt fluid or contamination early. Then perform a hot check because when the transmission is at operating temperature the fluid expands and the level reading uses the hot marks on the dipstick. Reading hot ensures you know the correct operating level. Using both checks gives you a full picture: cold for fluid health and hot for proper level.

Temperature affects both how transmission fluid looks and how the level reads on the dipstick. Do a cold check to assess fluid condition—color, smell, and consistency—without heat expansion, which helps you spot burnt fluid or contamination early. Then perform a hot check because when the transmission is at operating temperature the fluid expands and the level reading uses the hot marks on the dipstick. Reading hot ensures you know the correct operating level. Using both checks gives you a full picture: cold for fluid health and hot for proper level.