Where is the filling port for the automatic transmission of the new Jetta?
3 Answers
The filling port for the automatic transmission of the new Jetta is located on the left side of the transmission. Transmission: It is one of the main components of the automotive drivetrain system. It is a mechanical or hydraulic device used for mechanical power conversion. The actual usage conditions of vehicles are very complex, such as starting, idling and stopping, low-speed or high-speed driving, acceleration, deceleration, climbing, and reversing. This requires the vehicle's driving force and speed to vary within a considerable range, while the output torque and speed variation range of the widely used piston engines are relatively small. To adapt to frequently changing driving conditions and ensure the engine operates under favorable conditions (higher power and lower fuel consumption), a transmission is installed in the drivetrain system. Transmission Maintenance: Understand the replacement cycle for automatic transmission fluid. The internal control mechanisms of automatic transmissions are very precise with small matching clearances, so the fluid replacement cycle for most automatic transmissions is generally two years or 40,000 to 60,000 kilometers. Correctly replace the transmission fluid. Currently, the better method for fluid replacement is dynamic replacement, which uses specialized transmission cleaning equipment. During the operation of the transmission, the old fluid is thoroughly circulated and drained before adding new transmission fluid, achieving a replacement rate of over 90% and ensuring good replacement results. Check whether the automatic transmission fluid level is normal. The method for checking automatic transmission fluid differs from that of engine oil. Engine oil is checked when the engine is cold, while transmission fluid needs to be preheated to about 50 degrees Celsius. Then, after shifting the gear lever through all positions for 2 seconds each and placing it in the parking position, the normal fluid level on the dipstick should be between the maximum and minimum lines. If it is insufficient, add the same quality of fluid promptly.
The oil filler port of the new Jetta's automatic transmission is quite discreetly designed, and it took me quite a while to locate it for the first time. You need to lift the car to see it, specifically positioned on the left front side of the transmission housing, as a hex socket screw hole. Remember to prepare an 8mm hex wrench to unscrew it. It's best to perform this operation when the engine is warm, as the oil level can only be accurately checked when the oil temperature is around 35°C. After opening, use a dedicated oil filler to add oil until it overflows from the port, indicating it's fully filled. Note that only the original green ATF oil specified by the manufacturer should be used, as mixing oils can cause gear shifting jerks. DIY oil changes can easily lead to spills everywhere, so it's recommended to leave it to a repair shop if you're inexperienced, for a more reliable job.
Last time I changed the transmission fluid myself, I found that the Jetta's filler port was hidden near the connection point between the left axle and the transmission. After lifting the car, I had to remove the underbody shield first, then use a high-power flashlight to locate the hex screw along the transmission housing. I used a funnel with a soft tube connected to a syringe to fill the fluid, slowly injecting it in five stages. After each addition, I started the vehicle and cycled through the gears to circulate the fluid. When the fluid started overflowing from the inspection port during the third fill, I stopped. Although it saved money, it took over three hours and left my hands covered in grease. So, if you're not confident doing it yourself, it's better to just drive to the 4S shop for a quicker and hassle-free service.
