Two problems related to transmission gear slipping have been reported for the 2006 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Mercury Mountaineer based on all problems reported for the 2006 Mountaineer.
My 2006 Mountaineer has transmission problems. While coming to a stop at a light there is a loud "pop" or thud like noise as if the transmission is popping into place. Also transmission slips when going forward. It jerks especially at low speeds such as pulling out of a parking space. There is definitely something wrong with the transmission. Poor design or manufacturing but definitely something is wrong. You feel like you have been struck from behind when the popping/thud noise occurs at a light. Very unsettling. Also car lurches forward when pulling off from a standing position such as at a light and you feel like your going to hit the car in front of you.
2006 Mercury Mountaineer has transmission problems. Consumer states that his vehicle has been service several times but the problem is not fixed. The consumer stated the transmission would slip, most noticeably in frigid temperatures.