Maddison 4x4 in conjuction with HGM Electronics Inc. have delveloped a version of the popular after market  gearbox controller,Compushift. This new version of the controller can control ZF electronic gearboxes found in the Land Rover Discovery II range and the P38 Range Rover.

These units are available as a ECU kit which includes all the necessary wirring needed for instalation in most cases, In association with Ashcroft Transmisions a Defender Turnkey package is available which includes console, cooler pipes, oil cooler,shifter + cable, foot rest etc. In addition custom gearbox  modifications can be carried out to suite your vehicle requirements 

COMPUSHIFT is a state of the art transmission control system designed by HGM Automotive Electronics Inc. COMPUSHIFT operates automatic shifting and torque converter clutch lock up for a wide variety of transmissions.