Dorman 600-442 Differential Lock Actuator - Rear

Differential Lock Actuator for Rear Axle Control

This Dorman differential lock actuator is a direct replacement for the original equipment unit on select Toyota and Lexus applications. Built with an aluminum housing and electronic actuator design, it is engineered to restore proper differential lock operation on the rear axle.

Part number 600-442 is a practical OE-style solution for drivers searching for a rear differential lock actuator for Toyota Land Cruiser or Lexus LX450 models. It is also a fitment-based replacement for applications that cross-reference 600-442 during service lookup.

Key Features

• Direct replacement differential lock actuator for specific rear axle applications
• Electronic actuator design for controlled lock engagement
• Aluminum construction for durable housing support
• Blade-style connector/terminal configuration
• Package includes the actuator only

Detailed Description

Dorman 600-442 is engineered to replace the original differential lock actuator on select rear applications, including 1992-2011 Toyota Land Cruiser, 2013-2014 Toyota Land Cruiser, and 1996-1997 Lexus LX450. For owners searching for a rear differential lock actuator for Toyota Land Cruiser 1992-2014 or Lexus LX450 1996-1997, this part provides a direct-fit service replacement built around the original design.

The electronic actuator uses an aluminum body and blade terminal connection to match the vehicle’s factory-style setup. This makes it a focused replacement for restoring differential lock function when the original actuator is no longer operating correctly. Part number 600-442 is also referenced in service catalogs under interchange numbers used for the same application.

This part cross-references 4145060042 and J78002 for the same application.

What It Helps Fix

• Rear differential lock not engaging
• Intermittent or failed actuator movement
• Warning lights related to differential lock operation
• Loss of factory rear axle lock function
• Replacement needs after actuator wear or electrical failure

Installation Notes and Tips

Verify rear axle application, connector style, and model year before installation. Confirm that the vehicle uses the correct differential lock actuator configuration for Toyota Land Cruiser or Lexus LX450 service. Inspect the electrical connector and surrounding components for corrosion, damage, or contamination before installing the new actuator.

Quality Assurance

Dorman designs this replacement part to directly restore original equipment functionality on listed applications. The reverse-engineered design is intended to match the factory part’s fit and operation for the specified vehicles.