Allison - Automatic Transmission

Speed Sensor Replacement

Removal Procedure





Caution: Refer to Battery Disconnect Caution.

1. Be sure the vehicle ignition is turned off.
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





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

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

Notice: Refer to Fastener Notice.

3. Install the speed sensor bolt (1).

Tighten bolt to 12 N.m (108 lb in).

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