One problem related to transfer case has been reported for the 2005 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Mercury Mountaineer based on all problems reported for the 2005 Mountaineer.
Had warped rotors within first 2,000 miles. Ford would only ground rotors but dealer replaced them at no charge. I have also experienced a loud, thumping noise when I am making a sharp turn to left or right at a very low speed. Also, often when putting car in reverse many times there is a large thump and vehicle appears to shift hard. Finally, when stopped on a steep hill, after removing foot from brake, vehicle rolls backwards many times.