NHTSA — Power Train: Automatic Transmission Problems


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
32,542 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2005 Mercury Mountaineer transmission problems

transmission problem

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2005 Mercury Mountaineer Owner Comments

problem #11

Sep 152009

Mountaineer 6-cyl

  • 45,000 miles


Transmission jerking and jumping into gear, and reverse, roll forward in park on a hill. Liftgate has a crack around and under the symbol.

- Natchz, MS, USA

problem #10

Sep 042010

Mountaineer 8-cyl

  • 48,000 miles
Started out as a good car. At about 48000 miles it started to intermittently refuse to go into forward or reverse when placed in gear. Made sure it was in gear and also would move the shift lever out of gear and back again. Stepping on the gas just revved up the engine. Sometimes it would catch and the car would jump forward or backward. It is presently in a transmission shop and appears it needs to be rebuilt. Large metal chips were found in the oil pan. I was told by the dealer that I didn't have a drive train warranty, they weren't available for the 2005, I only had the 3year 36,000 mile warrant. The transmission shop showed me large chips in the oil pan. Also when disassembled they couldn't fine what was called a needle pin, which runs through the middle of the transmission. With that gone the transmission was gone. This wasn't a normal occurrence. So selves, washers/spacers, gears etc. Slowly were being destroyed. Overhaul kit torque convertor, planetary assy, solenoid assy., servo case repair kit, and transmission fluid. And all of the latest parts from Ford 6th upgrade on this transmission were installed. Ford should have a recall on this transmission. Reimbursement for costs would be nice. But then I'm a dreamer, and believe cars are being built better than they are. After a week or so of driving and the shifting still not smooth and parts being switched out. I was told it would be okay to out of state. I got about 70 miles when the transmission dumped the transmission fluid on the highway. After a $200 tow back to the garage and another week of searching for the problem it was decided it was the valve block. The only thing that was not changed. Seemed the valve block was warped. It was replaced and the car is back to normal. This should not be happening to a car with 48500 miles on it. Ford should be ashamed of them selves for producing a car vehicle that has so many transmission problems. I understand Ford is now on the 7th upgrade.

- Barnstable, MA, USA

problem #9

Sep 272010


  • 60,562 miles
2005 Mercury Mountaineer transmission jerks random intervals and causes driver to loose control of vehicle momentarily. Passengers inside car experience neck pain after several occurrences.

- San Francisco, CA, USA

problem #8

Jul 042010


  • 8,000 miles


Transmission lever binds when attempting to shift into park, slipping into reverse instead. Problem has occurred sporadically from 2007 to date. Usually the miss-shift is noticed because it just doesn't feel right, but not always. It can be most dangerous if you don't turn off the engine immediately (after attempting to shift into park) and take your foot off the brake. That has happened to me about 5 times over 5 years. It happened twice at a gas station, once at a car wash, once in a shopping center, and once in front of my house as a child walked behind the car. In each case the car only moved 1 or 2 feet before I realized it, and was able to step on the brake. These days I don't need to worry about it as much because (at 52,000 miles) the transmission takes 5 - 10 seconds to engage the reverse gear and then it bangs into gear, loudly alerting me that it didn't go into park.. the transmission is defective, and Ford knows it.

- Hillsborough, NJ, USA

problem #7

Dec 252009


  • 43,000 miles
Extremely hard shifting into reverse. Slipping in 3rd gear when transmission is running for 15 minutes. Over drive light flashes and transmission fails to work while on highway. I have to shift into neutral turn the car off then back on (while at 65mph) then it works fine the rest of the day.

- Meriden, CT, USA

problem #6

May 222009


  • 50,001 miles
Transmission slipping on a hill causing the vehicle to drift backwards almost causing an accident with the car behind me.

- Pittsburgh, PA, USA

problem #5

Apr 012009


  • 20,000 miles


Mercury Mountaineer 05 with less then 60,000 miles, I was told that there was wearing in the valve case from automatic transmission which causes transmission to skip and shift hard and pop forward, I need to have it repaired, transmission place states this is a known problem which has a technical advisory about it....what's my recourse.

- Merrick, NY, USA

problem #4

Mar 062008

Mountaineer 6-cyl

  • Automatic transmission
  • miles
There is a transmission issue with the Mountaineer or something that has to do with the car changing gears. My car is only a week old (2005) and it jerks when placed in reverse. Only has 61,000 miles. Other Mountaineer owners have complained of having the same problem with their transmission system.

- Detroit, MI, USA

problem #3

Dec 132007

Mountaineer 8-cyl

  • Automatic transmission
  • 74,000 miles
Minimal events lead up to transmission failure. Odd shifting when accelerating occurred the day of the failure and possibly several times overt the tow years, but very infrequently. Failure occurred at 74,000 miles of primarily highway driving with perhaps two reverses a day resulting at most 2,000 reverses for the life of the car. The same day as shifting problems occurred several times on the way home reverse gear would not engage and after several attempts would stay in gear for only a few seconds before going back into neutral. Never would go into reverse again. Failure required replacement of the solenoid shifters and valve bodies. This is the same failure that was a cause for a recall of several previous year's, including 2004.

- Benson, AZ, USA

problem #2

Aug 032006

Mountaineer 6-cyl

  • Automatic transmission
  • 9,302 miles
2005 Mercury Mountaineer V6 with AWD was placed in "park", engine turned off and key removed from ignition. The car slipped into reverse and rolled down driveway striking mailboxes across street.

- Southfield, MI, USA

problem #1

Aug 012005

Mountaineer 8-cyl

  • Automatic transmission
  • 100 miles
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.

- Granby, CT, USA

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