How many liters of oil are needed for a 6AT transmission fluid change?
2 Answers
It requires 6 to 7 liters. Here is the relevant information: 1. Automatic transmission fluid change: An automatic transmission fluid changer is a device that exchanges the transmission fluid in a vehicle. The device recovers and measures the old fluid while injecting the same amount of new fluid into the vehicle, maintaining the same fluid level in the automatic transmission. 2. Automatic transmission cleaning: The automatic transmission cleaning and equal fluid exchange machine uses two gravity sensors to weigh the new and old fluids. It calculates the flow rates of the new and old fluids based on the unit time, first determining the flow rate of the old fluid, and then the computer chip adjusts the speed of the new fluid pump to match the flow rate of the old fluid, ensuring equal flow rates.
I've personally changed the transmission fluid for many 6AT gearboxes before. For example, a gravity drain on a Volkswagen Magotan typically requires about 5 to 6 liters, while BMW models need a bit more, around 8 liters to be safe. During the operation, you need to lift the car, drain the old fluid, and clean the oil pan and filter screen—don’t skip this step to save time. Too little fluid can cause dry grinding and damage the gears, while too much can lead to foaming and affect lubrication. I always use original ATF fluid for its long shelf life, and after the change, the gear shifts feel much smoother on the road. A rule of thumb is to check the fluid quality every 50,000 kilometers or so—replace it if it’s too dirty to avoid sediment buildup and blockages. In winter, warming up the car gives a more accurate reading, while in summer, the thinner fluid requires extra care to prevent overflow. A reminder: wear gloves to protect against oil stains when doing it yourself, and after finishing, take a test drive for a few laps to ensure there are no unusual noises before calling it a success. Saving money is one thing, but ensuring your car’s longevity and safety should always come first—don’t cut corners.
