Hi Thanks. Have already done gearbox oil and gearbox filter so its got to be the ecu, so will try this and see what happens. Unsure what you mean about reprogramming it? will not a new one just do the trick? Gary24400

Hi Its a diesel one. Gary

I have a problem with my auto box on a 1997 P38 range rover its adding in kick down on its own accord so adds a little rev of about 1,000 every few minutes then when using kick down sometimes it just sticks in one gear, but stop and start and all goes back to normal, if you stay in top on motor...