Hi thanks for the reply, so basically the auto throttle acuator will move quicker and further to allow for Torque convertor slip and higher gearing? So running this coding on a manual may give a speed surge? The different coding units appear to be no longer available and all cruise amps supercede to just one type, so I guess I will just have to suck it n see! Unless anyone has a super rare manual coding plug? Regards Linds