July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Description And Operation: Description

The input speed sensor is important in that it detects the input shaft RPM and sends this information to the Transmission Control Module (TCM).
This data is necessary for all operations including feedback control, gear shift control and failure detection of other sensors.

Courtesy of KIA MOTORS AMERICA, INC.

Information
1. Input speed sensor 1
2. Input speed sensor 2