Unlike a manual transmission that uses heavy-weight gear oil, your vehicle’s automatic transmission uses a lightweight hydraulic fluid to assist in the gear-changing process and to keep your transmission cool and all the inner parts well lubricated, allowing for smooth shifting.
Like engine oil, your automatic transmission fluid needs to be changed from time to time. Your owner’s manual gives a specific interval for flushing or changing the fluid. If you choose to flush the system, the interval is typically every 30,000-50,000 miles or every 3-5 years.
There are a few symptoms you can watch for that may hint at your transmission needing to be serviced. If you notice any of the following conditions, it is recommended that you schedule transmission service as soon as possible. Look for these symptoms:
Flushing your transmission is a process of removing the old automatic transmission fluid in your vehicle. Flushing removes sludge and grime from your transmission. Once the flushing is complete, fresh transmission fluid of the proper grade is added to the transmission to keep it lubricated and cool.
A transmission fluid flush is not the same as a fluid change. While both procedures involve the removal of the old fluid, there are differences, and each service has a distinct purpose.
If your transmission is compromised or in poor working order, flushing is not recommended. The process could cause debris to be lodged in areas that could further damage the transmission.