If you have an automatic transmission in your Acura Integra, it is important to check the transmission fluid level once a month. The fluid is critical to the operation of the transmission, and if you keep it clean and full, the transmission will perform flawlessly for years. The transmission fluid is easy to check, and if you do it at the same time every month, it will become a routine that is not soon forgotten. Start the engine and let the car run until the engine is up to normal operating temperature. When the fan kicks on, you have reached normal operating temperature.