Two problems related to automatic transmission have been reported for the 2006 Ford Expedition. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Ford Expedition based on all problems reported for the 2006 Expedition.
Vehicle has been sputtering when accelerating at about 40mph. Spark plugs are "seered" and Ford mechanic tells us its a known problem, but not covered under the warranty because spark plugs are considered maintenance. The manual says we the scheduled maintenance is 100,000 miles and we are only at 76,000. If they are known to be faulty and we are not near the scheduled/recommended mainteance then shouldn't this be a warranty issue? I think Ford is milking its customers with faulty parts as I had the same issue with my brakes. It feels as if I am landing a plane when I come to a stop with all the shaknig an rattling. I was told this is a known issue with the Ford brakes - they just warp.
When exiting interstate, changes lane and as gas petal was pushed, no power to SUV, engine did not race or shake, just no power. Put SUV into first gear and it jerked ahead at 10 mph to stop light. While stopped, SUV would roll backward if brake not on. Made left hand turn and put back into gear, about one mile later same loss of power until put into 1st gear. One month later, also while exiting interstate had same loss of all power at bottom of ramp when trying to merge into left lane. SUV would only move after put into 1st gear, only at 10 mph. Dealership could find nothing wrong after a week with the first incident, dealer kept for 3 and a half weeks and the p&s director drove 716 miles and could not duplicate this problem. (note both happen within one week of dealer oil change) p&s director suspects fly by wire issue, said that compared to other 2005/2006 models ours has a dead pedal feeling.