Interaxle Lock Operation

108SD d 15.02.002

Notice: The interaxle lock should not be engaged on a vehicle with obviously spinning wheels. Engagement at high speed or power can damage the axle(s).

  1. With the engine running, press the upper half of the interaxle lock switch to engage the interaxle lock. Do not wait until traction is lost and the tires are spinning before engaging the interaxle lock.
  2. If the vehicle is moving, briefly let up on the accelerator until the interaxle lock engages. The red interaxle indicator light illuminates on the dash message center when interaxle lock is engaged.

    3. Notice: Do not operate the vehicle continuously with the interaxle locked during extended good road conditions. To do so could result in damage to the axle gearing and excessive driveline and tire wear.

  3. Proceed over poor road conditions with caution.
  4. Press the upper half of the interaxle lock switch again to disengage the interaxle lock after leaving poor road conditions.

    5. Note: If the interaxle lock is engaged when the engine is turned off, the interaxle lock will disengage.

  5. If the vehicle is moving, briefly let up on the accelerator to allow the interaxle lock to disengage, then resume driving at normal speed. Once the interaxle lock disengages, the indicator light will go off.
Note:
Parent topic: Interaxle Lock, Tandem and Tridem Axles
Document Number: 0000111871
Manual Publication Date: 2024-09-03
Topic Publication Date: 2024-05-02