This guide provides a detailed Transmission Fluid Temperature Chart, explaining normal, optimal, and dangerous temperature ranges for various vehicles and conditions.
Whether you drive a car, truck, or hey-duty vehicle, understanding fluid temperature helps you extend transmission life and oid costly repairs.
Transmission Fluid Temperature Chart Temperature (°F/°C)Estimated Fluid Life (Miles)Condition Description100°F / 38°C100,000+ milesVery cool; transmission may shift stiffly when cold.150°F / 65°C80,000 milesOptimal for light-duty operation; safe for most conditions.175°F / 80°C75,000 milesIdeal temperature range; fluid maintains full protection.195°F / 90°C60,000 milesNormal for most modern automatic transmissions.210°F / 99°C50,000 milesSlightly warm but still acceptable under load.225°F / 107°C25,000 milesOxidation begins; fluid starts to darken.240°F / 116°C12,000 milesFluid life reduced by half; potential clutch slippage.260°F / 127°C6,000 milesSevere oxidation; varnish forms on metal surfaces.275°F / 135°C2,500 milesFluid turns dark brown; potential for transmission damage.300°F / 149°C