Their turbine-speed sensors look similar but won’t interchange.
At first glance you might think the AX4S and AX4N turbine-speed sensors are the same. However, a closer look will show you that the AX4S sensor is a little longer – which means you easily could install the wrong sensor in a unit by mistake.
As almost all of us are aware, a technician can easily create a scary nightmare when trying to mix and match parts while making repairs to some of Ford’s automatic transmissions. A classic example of this is interchangeability of the lockup solenoid (LUS) for the 1991 AXOD-E (AX4S) transaxle.