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Transmission Speed Sensor (TSS)

WARNING: This page is about a different car, the 1994 Mercury Sable, 1994 Mercury Cougar, 1994 Lincoln Continental, 1994 Ford Thunderbird, and 1994 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.

TSS (also known as turbine shaft speed sensor) is a magnetic pick-up that sends a signal to the PCM. The PCM uses this signal to determine transmission RPM.