Hi new to the forum but thought i should let you all no that Fords do not change the oil nor the oil filter in any autobox.Come to that not many makers do and yet it says it is ment to be changed,on most auto's every 24,000 miles.So if you start to get slipping in gears dont just top the fluid up make sure you change the filter,very simple job should only take about 20 mins.If you have had a major service make sure they have changed the auto box filter as you are charged for it.Even the parts department at my local Fords did not no wot it looked like,SO CHECK ITS BEEN DONE or it will be exspencive when you have to have a new gearbox.