How To Check Transmission Fluid In A Car. (in some smaller automatic gearboxes, such as those used in bl cars, the transmission fluid is the same oil as that which lubricates the engine, and is drawn from a common sump.) keep the fluid level up to. Although the method for checking automatic transmission fluid is similar for most vehicles, check your owner’s manual just in case.
Always use the fluid recommended by the manufacturer. But over time, the fluid will start to break down—which is why you should check it regularly and perform a transmission fluid change on the date/schedule and mileage recommended by the vehicle manufacturer.
Can you check the transmission fluid without the car running? Check in the car handbook which particular fluid should be used for your car.