Early Discovery 2's were not supplied with a centre diff lock function for the LT230 transfer case although the vehicles still have the centre diff lock installed in the transfer case. To get the diff lock function to work it just needs connecting.
The linkage is easy to fit, cable operated and very neat. You attach the existing high/low stud to this new lever assembly.
This kit will only work on transfer cases with serial numbers starting with either 41D or 42D.