Automatic Transmission Speed Sensor – ACDelco (24239284)

Automatic Transmission Speed Sensor is an electrically controlled component in the engine or transmission management system. Because the module cross-checks it against other inputs, a fault here often surfaces as a code for a different circuit.

Replace the Speed Sensor when a value freezes or drops out intermittently, which usually means an internal fault rather than wiring. Wiggle-testing the harness while watching live data separates the two.

Reference number for the Speed Sensor: 24239284. It is filed under Sensors & Switches, and it is the number that has to match the part coming off the vehicle.

Genuine ACDELCO part for the Speed Sensor. Where the manufacturer has superseded a number, the current reference is the one that ships.