Ok I took it on the motorway today and got it upto 70 in 4th and as soon as I came off motorway and it changed down to 3rd I got the "gearbox fault" message flash up and once again the "p,r,n,d" display wasn't visible on odometer...
So I maybe wrong here but I'm thinking what if something is telling the car that there is a problem with 4th gear so it is trying not to use 4th therefore increasing the rev range in the lower gears and only going into 4th when it has no other choice....
Or what if the gearbox has been changed or the ecu has been changed in the past and the part numbers don't match up?
Do they do a 3 speed box? As I only have 1,2,3,d on my gear selector no "4" option???