2004 Mercury Mountaineer. Transmission is engaging into Reverse, but car won't move.

Asked by Mar 12, 2019 at 05:17 PM about the 2004 Mercury Mountaineer Luxury AWD

Question type: Maintenance & Repair

Transmission is engaging into Reverse, but car won't move.  The tires roll
backwards just fine while on the lift, but won't move when on the ground.  All
other gears, moves just fine.  Found a YouTube video where someone used
Sea Foam and it fixed the problem.  We did that, it's didn't work for us.  Any
suggestions on what could be causing this?

1 Answer


First check tranny fluid level. Chances are transmission can't build up enough fluid pressure to engage reverse, that might indicate a problem with the valve body, or a dirty filter. A worn pump shaft or torque converter might also cause loss of fluid pressure in the tranny but you would likely hear some whining noises or see problems in other gears. You may also have a dirty shift solenoid. I would suggest taking it to a real transmission shop, one that has a diagnostic stand and can run the tranny through its paces, and can change fluid/filter if needed. Most local shops tend to farm out tranny related stuff, so skip those and go straight to the tranny shop yourself. PS: seafoam can free up a sticking shift solenoid but you have to be careful in using that, it does not have the ability to keep a tranny running cool, and heat kills transmissions. You run seafoam for a specific amount of miles, then drop the pan and replace the filter and fluid.

Your Answer:

Mercury Mountaineer Experts

  • #1
  • #2
  • #3
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Ford Explorer
1,422 Great Deals out of 75,689 listings starting at $999
Used Jeep Grand Cherokee
1,589 Great Deals out of 81,546 listings starting at $500
Used Ford Expedition
382 Great Deals out of 29,872 listings starting at $2,500
Used Mercury Mariner
22 Great Deals out of 673 listings starting at $1,995
Used Lincoln Aviator
3,496 listings starting at $3,795
Used Ford Escape
1,861 Great Deals out of 80,690 listings starting at $900
Used Lincoln Navigator
123 Great Deals out of 6,546 listings starting at $2,995
Used Ford F-150
3,764 Great Deals out of 237,238 listings starting at $199
Used Nissan Pathfinder
538 Great Deals out of 22,250 listings starting at $1,500
Used Ford Taurus
256 Great Deals out of 8,341 listings starting at $1,500
Used Nissan Armada
259 Great Deals out of 9,324 listings starting at $2,250
Used Dodge Durango
523 Great Deals out of 25,780 listings starting at $1,495

Used Cars for Sale

2010 Mercury Mountaineer For Sale
61 listings starting at $2,995
2009 Mercury Mountaineer For Sale
11 listings starting at $4,995
2008 Mercury Mountaineer For Sale
80 listings starting at $2,875
2007 Mercury Mountaineer For Sale
5 Great Deals out of 65 listings starting at $999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.