Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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really awful
Typical Repair Cost:
Average Mileage:
86,841 miles
Total Complaints:
6 complaints

Most Common Solutions:

  1. had to have the transmision rebuilt (5 reports)
  2. not sure (1 reports)
2004 Mercury Mountaineer transmission problems

transmission problem

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2004 Mercury Mountaineer Owner Comments

problem #6

Aug 112015

Mountaineer LX 4.6L

  • Automatic transmission
  • 121,000 miles


The same transmission in the 04/05 Ford Explorer was installed in my mountaineer. The problem is he transmissions were defective and cause every owner this problem sooner than later.

- , Raleigh, NC, USA

problem #5

Feb 202013

Mountaineer ES V6

  • Automatic transmission
  • 90,000 miles

Had to have my 2004 transmission replaced in 2012 because the fluid dried up. It's a closed system. Now................................... it's starting to act up again. What's going on here?

- , Vero Beach, FL, USA

problem #4

Oct 162013

Mountaineer LX V6

  • Automatic transmission
  • 76,000 miles

2004 Maintainer (V6) transmission failed after 76,000 miles. It costs $2,600 to rebuild the transmission. Ford doesn't want to offer any discount for the repair.

- , Troy, MI, USA

problem #3

Oct 132012

Mountaineer V6

  • Automatic transmission
  • 77,184 miles


My transmission gave out the first time @33,000 on Feb 2008. It gave out a second time @ 77,184 on October 13, 2012. I started doing research online on this truck and i found a lot of complaints on this trucks transmission. Yet Ford is not willing to do a recall on it.

- , Chicago, IL, USA

problem #2

Apr 052011

Mountaineer 4.0L V6

  • Automatic transmission
  • 89,863 miles

transmission went out 3,750.00, seal broke two weeks later.

- , Lakeland, FL, canada

problem #1

May 122010

Mountaineer 4.0 V6

  • Automatic transmission
  • 67,000 miles

I purchased my SUV in December of 2008, the truck had 43,000 miles on it and it drove great. When I got up to about 60,000 miles I noticed that the transmission would sort of lag a little before it would shift so I brought it into the dealer to have them take a look at it. They checked the tranny fluid, hooked it up to their machines AND took it for a road test twice and were unable to duplicate what I had experienced. They said as far as they can tell the tranny was in perfect working condition. The next day I was on my way to work accelerating from 30mph up to 40mph and the transmission completely went out. The Dealer Quoted me $3,900 for the work. I found a local shop and ended up paying about $1,900 and didn't have anything to drive for five days straight. This experience was a HUGE inconvenience for me!

- , Red Wing, MN, USA

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