Experiencing issues with your Ford F-150’s auto stop/start system? You might need to understand the role of the Auxiliary Transmission Pump. This component, often overlooked in standard maintenance guides, plays a crucial part in the smooth operation of your vehicle, especially if it’s equipped with auto stop/start technology.
Many Ford F-150 owners, like yourself, may encounter unexpected symptoms after routine maintenance, such as a transmission fluid change. One common concern is a harsh jerking motion upon initial start-up, particularly in models with auto stop/start. This issue, sometimes occurring without any error codes, can be puzzling. Could this be related to the auxiliary transmission pump?
Auxiliary transmission pump location and function
The auxiliary transmission pump is designed to maintain transmission fluid pressure when the engine is temporarily shut off by the auto stop/start system. This ensures that when the engine restarts, the transmission is immediately ready to engage, providing a seamless driving experience. Without a functioning auxiliary transmission pump, the system might experience delays or rough engagements, leading to the jerking motion described.
If you’ve recently changed your transmission fluid and filter, and subsequently noticed issues with your auto stop/start, it’s worth considering whether the auxiliary transmission pump is functioning correctly. Some speculate that a fluid change could potentially affect the pump’s prime, leading to operational problems. While standard maintenance procedures might not explicitly mention the auxiliary transmission pump, understanding its role is vital for diagnosing issues related to auto stop/start.
While bypassing the auto stop/start feature might seem like a workaround, it doesn’t address the underlying issue with the auxiliary transmission pump. If the pump has indeed failed, it’s essential to determine the root cause and consider appropriate repairs. Consulting a professional mechanic familiar with Ford F-150 transmissions and auxiliary transmission pump systems is highly recommended for accurate diagnosis and repair solutions.
For a visual understanding of the auxiliary transmission pump and its replacement, resources like the video linked in the original discussion can be incredibly helpful: https://youtu.be/E8AIvmA3PHo. This can provide further insight into the pump’s location and function within your Ford F-150’s transmission system.
