Allison - Automatic Transmission

Speed Sensor Replacement

Removal Procedure





1. Be sure the vehicle ignition is turned off.

Caution: Refer to Battery Disconnect Caution in Service Precautions.

2. Disconnect the external wiring harness from the speed sensor.
3. Remove the bolt (1) from the speed sensor and carefully remove the speed sensor (2).

Installation Procedure





1. Install a new a O-ring on the speed sensor (2). Lubricate the O-ring with clean transmission fluid.

Important: Do not rotate the sensor in its retaining bracket. Changing the sensor/bracket orientation may cause improper operation.

2. Install the new speed sensor (2) into the speed sensor bore. Align the hole in the retaining bracket with the bolt hole in the speed sensor boss.

3. Install the speed sensor bolt (1).
^ Tighten bolt to 12 Nm (108 inch lbs.).

Notice:
Refer to Fastener Notice in Service Precautions.

4. Reconnect the external wiring harness to the speed sensor.