What must an operator take if the transmission oil temperature goes into the red band on the M915?

Answer: C — Stop and investigate

When the transmission oil temperature gauge indicates that the temperature has entered the red band, it signals a critical condition that requires immediate attention from the operator. Stopping the vehicle and investigating the cause is essential because operating the vehicle under these conditions can lead to severe damage to the transmission system. High transmission oil temperatures can be indicative of several issues, such as low oil levels, a malfunctioning cooling system, or other mechanical failures, which could compromise the vehicle's performance and safety. Taking the appropriate action to stop and investigate allows the operator to assess the situation thoroughly, check the oil level, and determine whether there are any leaks or other readiness concerns that need addressing. This proactive approach helps prevent further damage and ensures that the vehicle can continue to operate effectively and safely on the road.