One problem related to transmission noise 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.
Automatic transmission- this transmission is horrible a few times I noticed the severe noise and jerk when I went to reverse. I thought perhaps it was me. On christmas eve I went to pull away from stop light and car started to accelerate then slowed down I gave it a little gas and it jerked me so hard it hurt my neck (which is still bothering me today). The od light came on and check transmission. Repair cost $2,7000, basically everything went bad. After hearing from numerous people this is a problem that Ford is aware of. They even went so far as to correct it for future models but has yet to perform a recall on 2005 Mountaineers and explorers. As Ford was aware of this problem corrected it for future models they should be liable and a recall notice should be forthcoming. Anyone who has experienced this should get full refund of monies paid. Now to address the cracking around the Mercury emblem on the lift gate. Ford is aware of this problem and has changed it for future models, but instead of stepping up and correcting pass models they sweep it under the rug. A full investigation into both of these concerns as with transmissions someone could easily be fatally injured.