DISCOVERY 2 CENTRE DIFF-LOCK

Some Discovery 2 models have the high/low ratio lever, but no option for diff lock. Lever can be retrofitted, but it isn’t necessary with traction control. EARLY DISCOVERY 2 models do not have a centre diff-lock lever in the cab because they have electronic traction control (ETC), which eliminates the need for it. Traction control uses the ABS system to lock any wheel that spins, thus preventing all of the torque being transmitted to a spinning wheel. Hence, full torque is always transmitted to the wheels that have grip. Some owners still prefer to have a centre diff lock (which can be retrofitted) on the grounds that it gives a little more driver control and ability in some more extreme off-road situations.

The earliest Discovery 2 models still had the diff lock mechanism fitted but no lever, and a kit is available to install the lever and linkage to operate the existing mechanism. This applies to transfer boxes with serial numbers prefixed 41D and 42D. You can check by feeling the top of the transfer box front housing. If it is smooth, you don’t have the internal mechanism, but if you feel a screwed stud projecting upward, you have the mechanism and just need the lever kit.

For subsequent vehicles that do not have the mechanism nor the lever (diff If the diff lock mechanism is fitted, you can see or feel the threaded stud rising from the top of the front housing (foreground). Ashcroft Transmissions supply this centre diff lock kit including a new front housing. A lever will be needed too. lock was available as an option when new), Ashcroft Transmissions produce a kit, which includes a new front housing and the necessary parts and seals. This applies to transfer boxes with serial numbers prefixed 61, 62, 69 and 70D. You’ll also need the above lever kit.