DCDL Operation
Warning: Locking the wheels when the vehicle is traveling down steep grades or when the wheels are slipping could damage the differential and/or lead to loss of vehicle control, causing personal injury and property damage.
Notice: Engage the DCDL only when the vehicle is stopped or moving at less than 5 mph (8 km/h). Engaging the DCDL at speeds above 5 mph (8 km/h) can cause internal axle damage.
Note: On some vehicles, the differential lock system is connected through the low speed range of the transmission. If this system is used, the transmission must be in the low speed range for the wheels to fully lock. In addition, shifting out of low speed range will also disengage the differential lock.
Note: If the DCDL is engaged when the engine is shut down, the DCDL will disengage.
- With the engine running, press the upper half of the differential lock switch to engage the DCDL.
- If the vehicle is moving, briefly let up on the accelerator to relieve torque on the gearing, allowing the differential to fully lock. An indicator light on the differential lock switch illuminates when the lock is engaged. Depending on the vehicle configuration, a buzzer may also sound.
- Drive cautiously and do not exceed 25 mph (40 km/h). When
the differential is fully locked, the turning radius will increase
because the vehicle understeers. See Fig..
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Turning Radius When the DCDL is Engaged (understeer condition)
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Turning Radius When the DCDL is Disengaged
Fig. 1, Turning Radii
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- Press the lower half of the differential lock switch to disengage the DCDL after leaving poor road conditions.
- If the vehicle is moving, briefly let up on the accelerator to allow the wheels to fully unlock, then resume driving at normal speed.
Warning: Be especially careful when driving under slippery conditions with the differential locked. Though forward traction is improved, the vehicle can still slip sideways, causing possible loss of vehicle control, personal injury, and property damage.