How often should you flush your transmission fluid?
How often should you flush your transmission fluid? Most manufacturers recommend a transmission flush every 30,000 miles or every couple of years. However, there are other times besides these intervals when a flush might be a good idea. These include: When the fluid is dirty or “burnt.” What happens when you flush the transmission machine? This causes fluid to flow through the cooler line. As fluid leaves the cooler line it enters the chamber on the flush machine. As the old fluid side of the diaphragm fills it pushes the diaphragm up and forces new fresh fluid into the transmission....