niose when i decelerate

Check your tires for edge wear, choppy tread. Or, could be hub bearing(s) making noise. Can be other things as well, especially if you have 4x4 or All Wheel Drive...you'll need to get a good tech to observe your issue with you and give an opinion. Good luck!

most likly cause in problem in differental bearings if it is a all or 4 wheel drive.have seen many of the explorer & mercury mountainer with this problem.