2007 Mercury Mountaineer transmission problems

Filed Jun 18, 2025 · Transmission · 78,000 miles · CA

The contact owns a 2007 Mercury Mountaineer. The contact stated that after shifting the transmission from park(P) to reverse(R), the vehicle failed to respond. The contact removed and reinserted the fob key in the ignition to correct the failure. The vehicle was taken to an independent mechanic, who diagnosed that an unknown transmission part needed to be replaced. The vehicle was not repaired. The mechanic instructed the contact to pull the park release lever each time to shift the vehicle out of park (P). The manufacturer was made aware of the failure and advised the contact to file a complaint with the federal safety agency Hotline. The failure mileage was approximately 78,000.

Filed Apr 12, 2021 · Transmission · 137,000 miles · PA

Had to replace transmission completely at 137,000 miles. There's been a lot of complaints about these transmissions at this mileage and ford should be responsible for some of the cost. This is ridiculous.

Filed Oct 24, 2019 · Transmission · 130,000 miles · MI

I had to replace the transmission and some other related parts in my vehicle and I was informed by a dealership that there was a "silent recall" on this transmission and that even though ford motor company was aware of the issues as early as 2000 they continue to install them in vehicles. If you look online you will see quite a number of complaints on this transmission. I feel since ford knowingly kept using these transmissions and was well aware of their possible failure when they reached 130,000 miles that they should be responsible for at least a portion of he costs if indeed, not all of the cost of replacement. What happens when a car company puts out a silent recall? Do I have any rights? I have already sent a certified letter to ford motor customer relations in dearborn, mi and I have a signed receipt that they accepted my letter but they have not bothered to contact me at all. What are my options and is this something you can help me with? The first time this transmission caused a problem was when we were in 5 pm traffic on a road with a speed limit of 55 miles an hour and the car just stopped leaving my family in the middle of a busy two lane road which was very dangerous. We were finally able to get the vehicle to the shoulder. I can forward my bills and copies of online conversations regarding the failure of these transmissions.

Filed May 30, 2018 · Transmission · 60,000 miles · MI

Tl* the contact owns a 2007 mercury mountaineer. While driving various speeds, the vehicle would jump and jerk. The vehicle was taken to an independent mechanic and it was diagnosed that the transmission failed. The dealer and manufacturer were not made aware of the failure. The vehicle was not repaired. The failure mileage was 60,000. *tt updated 9/21/18

Filed Apr 8, 2018 · Electrical, Steering · 150,000 miles · MA

While driving my seat will randomly move back and forth as if I took the keys out. Thought something was wrong with my transmission but after having the garage put transmission fluid in it still feels like the transmission is messed up even though the garage says the transmission is fine.

Filed Jan 28, 2018 · Transmission · 121,000 miles · VA

Transmission would not shift out of low gear

Filed Nov 4, 2017 · Acceleration, Body · 130,000 miles · MO · crash

My 2007 mercury mountaineer never had any problems until recently, thought it was the transmission because of the way it drove. Took it to the mechanic and got transmission fluid put in but the problems remained the same and was told the transmission was fine. My thermostat housing unit was leaking (this is very common with these cars and very dangerous, needs immediate attention!) and had caused very expensive wiring issues. Almost acts exactly like the transmission is going out - RPM's are way too high, the vehicle would not accelerate in the middle of city traffic, the car jumped at a stoplight and caused me to hit the car in front of me, and it doesn't shift properly. Problems occurred out of nowhere and are too dangerous to be ignored but very expensive to be fixed. Its very common and should be recalled before someone gets seriously injured!!!!

Filed Mar 1, 2015 · Electrical, Transmission · 91,305 miles · VA

Seat moved back for "easy exit" all vehicle components shut off and vehicle brakes locked up in the road then cut back on by itself and transmission jerked into gear like someone rear ended us! Very scary and unsafe with my 10 month old in the vehicle!

Filed Jul 29, 2014 · Fuel system, Transmission · 170,000 miles · PA

First off when I bought the vehicle the rear wiper does not work. Secondly when you put the vehicle in reverse it jolts before going into reverse. Finally it only let's you put so much of fuel into the gas tank at a time before stopping the fuel flow into the gas tank.

Filed Jul 7, 2014 · Transmission · 97,400 miles · MI

Vehicle will not shift out of park. Shift is locked into park and will not shift to any gear and depressing lever button and brake will not release out of park. I purchased the vehicle from huntington ford in rochester hill and bought the extended warranty and was told by fords service department this is not covered and would cost $500.00 just for the part. After researching this problem I have noticed other complaints about this issue that the car will not move out of park. This seems like it may be a defect because I have never experienced this problem out of many vehicles I have owned for years.