What is the transmission oil temperature range for continuous operation?

• A. 0-115 °C
• B. 120-130 °C
• C. 0-100 °C
• D. 115-150 °C

Answer: (A)

Transmission oil temperature must stay within a safe range that keeps lubrication effective while preventing oil degradation during steady operation. The best choice sets a continuous operating band from 0°C up to 115°C, which covers cold-start readiness (oil remains pumpable near 0°C) and keeps the oil within its safe viscosity and thermal limits at the high end. If the temperature climbs much above 115°C, the oil can oxidize more quickly, viscosity can drop too much, and wear the parts or seals may increase. Options that require higher minimum temperatures or allow a higher maximum for continuous use don’t reflect the sustained, safe operating envelope.