Home Technology Meritor Driver-Controlled Differential Lock (DCDL)

Meritor Driver-Controlled Differential Lock (DCDL)

Meritor, Inc. is a leading global supplier of axle, brake and suspension solutions for commercial truck, trailer, off-highway, defense, specialty and aftermarket customers.

source/image(PrtSc): Meritor

A Driver-Controlled Differential Lockprovides maximum vehicle traction and control on unfavorable road or highway surfaces. An IAD is a driver-controlled, air-actuated traction device that allows for speed differences between the forward and rear tandem axles, while providing equal pulling power from each axle of the tandem.

The DCDL is typically activated with air pressure from the cab, triggering a shift assembly mounted on the axle. When activated, a shift collar moves laterally toward the differential case, along the axle shaft’s splines, to allow splines on the shift collar to engage with mating splines on the differential case.


This action locks both the differential and axle shafts together as a solid unit, and effectively eliminates main differential action.Maximum traction is then provided to both wheels, and you’re provided with added protection against spin-out damage to the differential.