Land Rover LR3 LR4 Transfer Case Shift Motor IGH500040

This is a replacement transfer case shift motor for the two-speed transfer case on the Land Rover LR3 (2005-2009), LR4 (2010-2016), Range Rover and Range Rover Sport (2006-2017) and Discovery (2017-2018). It replaces Land Rover IGH500040 and crosses to 600-939.

The motor bolts to the side of the transfer case and drives the range change between high and low. When its brushes or internal gears wear out the case stops shifting, and the truck usually tells you with a 4x4 or transfer box fault on the dash, a low-range request that never completes, or hill descent and terrain response modes that will not engage. Before buying a motor, check for a blown fuse, corroded connector or a low battery, since all three can throw the same fault.

To replace it, disconnect the battery, unplug the motor, and pull the mounting bolts. Note the position of the shaft before you remove the old motor and make sure the new one engages the shift shaft at the same position. Bolt it up, reconnect, and cycle the range change several times to confirm the fault clears. Some vehicles need the transfer case fault codes cleared with a scan tool before the warning goes out.