I find this section of the Microcat catalogue too confusing to tell if there's a difference between the 4.0 and 4.6 computers but according to this thread < Disco Td5 autobox: replacing torque converter - Discovery Forum - LR4x4 - The Land Rover Forum > there are three different sizes - small for Td5, medium for 3.9/4.0 and large for 4.6:
http://picturestack.com/357/18/wgZ3tcBXH.jpg
wgZ3tcBXH.jpg
Have we actually heard yet from anyone who has successfully done this? I'm currently trying and hitting M&S light error https://www.aulro.com/afvb/discovery...ml#post2866806
EDIT: Auto trans controller / at ecu v8 to td5 disco 2 might be interesting reading relating to this.

