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Mercury transmissions & drivetrains repair questions and answers

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  • Greg
    Greg - 2002 Mercury Mountaineer - Transmissions & Drivetrains - 3/20/2014
    Why is there a humming noise coming from the rear of my AWD
    only makes noise while accelerating, but gets louder and higher pitched as speed increases.
     
    • Jimm
      3/20/2014 Jimm
      Most likely the noise is related to either worn / faulty rear axle bearings, or worn / faulty rear hub bearing assembly on that one side. Also, check the rear axle gear lube / fluid level and refill as necessary.

      As the first step - raise and support the rear wheels off the ground (use jack stands for support). Then, slowly - by hand - rotate each rear wheel and listen carefully for any noises at the center of the wheel / hub area. Telltale trouble indicators for the rear bearings would be any; especially - grinding, scratching, dry sounds heard.

      The rear hub bearing assemblies are easily and inexpensively replaced. Use the 'How-To-Guides' feature on the AutoMD website for the specific steps.

      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the rear axle hub bearing assembly from around $100.00 each, and the rear axle bearings from around $25.00 each for your vehicle. Be sure to replace both the rear bearings and / or hubs at the same time due to mileage / age / wear considerations.
      Jimm
      3/20/2014 Greg
      Thanks for the feedback Jimm, I will check it out.Why does the sound go away when I let off the gas peddle?
    • Jimm
      3/20/2014 Jimm
      Simple - the thrust and stress of the axle rotation, plus the torque - is reduced (unloaded) when the accelerator is released and the vehicle is coasting. In other words, picture the axle bearing as a round donut and the axle shaft through the donut center at a right angle. The donut (bearing) has a load applied with the clockwise rotation (torque) of the shaft through the center.

      With the bearing intact / not worn excessively - the bearing center rotates smoothly to fully support the axle shaft. As the bearing shows wear - with mileage and age, the bearing and / or axle shaft surfaces make contact - causing more wear and eventually strange noises such as the 'humming' or some degree of harshness is heard or felt - or both.
      Jimm
      3/20/2014 Greg
      You're good!!! Thanks again.
  • AutoMD Member
    AutoMD Member - 1997 Mercury Mountaineer - Transmissions & Drivetrains - 3/14/2014
    The auto shop I recently took my truck to get a diagnose at said its the driveshaft and differentials, Is this a right?
    sounds like my front tires are rubbing against the frame and smells like burnt rubber and makes noise while driving. Shocks are good, brakes getting bad and needs a tire rotation.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2006 Mercury Milan - Transmissions & Drivetrains - 2/9/2014
    Ignition key cannot be removed when shifted into park.
    This is the second time this has happened. Problem solved itself the first time. Now it is doing it again.
     
    • james
      2/9/2014 james
      i had the same problem, check your brake lights if you have none then replace your brakelight switch
    • HouseCallAuto
      2/9/2014 HouseCallAuto
      If this Milan has a floor shifter which I believe it does, then the cause is a bad micro-switch in the shifter ass'y and the switch is not sold separately from the shifter. Replace the floor shifter.

      1. Verify that the floor shift mechanism is fully going into the Park position. When the shifter is in the Park position, an internal electrical switch should relieve a ground signal on a Dark Green / Orange wire which in turn deactivates a solenoid in the switch and will allow for the key to be removed.

      2. If the floor shift mechanism is making full engagement to the park position, replace the floor shifter assembly.
  • AutoMD Member
    AutoMD Member - 1987 Mercury Grand Marquis - Transmissions & Drivetrains - 2/3/2014
    The car vibrated really bad, then lost speed, then the back tires wouldn't turn. What is wrong with it?
    The car doesn't vibrate all the time, but it has done it before. The car went from 60 to 45 and wouldn't go any faster. It has been towed.
     
    • HouseCallAuto
      2/3/2014 HouseCallAuto
      Sounds like something related to the rear brakes has seized up, maybe a caliper, maybe the rear differential pinion bearings. Can't diagnose it this way.
      HouseCallAuto
      2/3/2014 AutoMD Member
      Thank you for giving me an idea of where the problem might be coming from. At least now I have a starting point.
  • AutoMD Member
    AutoMD Member - 1987 Mercury Grand Marquis - Transmissions & Drivetrains - 2/3/2014
    The car vibrated pretty bad as it lost speed, then the back tires stopped turning. What is wrong with it?
    The vibrating doesn't happen all the time, but it has happened before. It went from 60 to 45 miles an hour and wouldn't go any faster. It had to be towed.
     
    0 answer
  • james
    james - 1997 Mercury Sable - Transmissions & Drivetrains - 1/27/2014
    I was driving today my car stop in but will not go,look under hood . there i see trans. fluid all over the top of trans.
    i put more fluid in drive a little distance & the is out.what went wrong?
     
    • Jimm
      1/27/2014 Jimm
      Most likely a leaking transmission; transmission cooling lines (the tubes to and from the radiator) - check the transmission fluid level as a first step, refill as necessary. Then, clean up all the fluid on the exterior of the transmission - to be able to better view any leaks.
  • AutoMD Member
    AutoMD Member - 1994 Mercury Tracer - Transmissions & Drivetrains - 12/26/2013
    Disengage clutch activates starter regardless of ignition switch position.
    Brake light is on. Fuel cutout switch light is on. The car starts so the fuel cutout switch is not tripped. When I depress the clutch the starter is activated even when the engine is running.
     
    • HouseCallAuto
      12/26/2013 HouseCallAuto
      Shorted ignition switch is likely. Pushing the clutch pedal down allows the crank circuit to "complete" so that circuit is doing what it is supposed to do. What is happening here that shouldn't be is the ignition switch is shorted in "cranking" mode regardless of the key position.
      HouseCallAuto
      12/27/2013 AutoMD Member
      Thank you for your answer. I was figuring something like that but others thought it was something else. I will pursue this course first and see what I can come up with. I appreciate your help!
  • AutoMD Member
    AutoMD Member - 2002 Mercury Grand Marquis - Transmissions & Drivetrains - 12/16/2013
    My transmission lost reverse (act like it's in park) & will drive forward in neutral. What could be wrong?
    Could this be a torque converter or an issue with the linkage? We had a lot of snow this past weekend and I had to go from D to R a few times (not doing neutral drops), could that effected it?
     
    • HouseCallAuto
      12/16/2013 HouseCallAuto
      Check the linkage at the base of the steering column. The bolts for the shift arm may be loose. Use threadlocker and tighten as necessary. They are torx head bolts.
  • AutoMD Member
    AutoMD Member - 1988 Mercury Colony Park - Transmissions & Drivetrains - 12/16/2013
    Remanufactured AutoTransmission
    We are looking for supplier who could supply us 1988 Coloney Park LS Automatic Transmission Remanufactured or rebuilt to Japan. We have address in USA you can send there, we’ll arrange shipping to JPN. Ofcouse direct to Japan are the best. Vin No: ...
     
    • Jimm
      12/16/2013 Jimm
      The remanufactured transmission is readily available; try these on-line sources; www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few sources.
  • AutoMD Member
    AutoMD Member - 2002 Mercury Cougar - Transmissions & Drivetrains - 11/17/2013
    Transmission (automatic) will not shift out of low. Will shift manually fro 1 to 4th.
    Could this be a speed sensor control problem?
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2002 Mercury Cougar - Transmissions & Drivetrains - 11/17/2013
    Transmission (auto trans) will not shift out of low gear, must shift manually from 1 to 4th.
    Could this be a speed control sensor problem?
     
    0 answer
  • leohawaiiarmy
    leohawaiiarmy - 2000 Mercury Mountaineer - Transmissions & Drivetrains - 10/8/2013
    When i get up to around 40mph if i take my foot of the gas pedal and then press it again my vehicle only revs up?
    dont feel it shift into gear, all other gears work fine, i can drive it in 2 and i dont have that problem. Check engine light is not on.
     
    0 answer
  • leohawaiiarmy
    leohawaiiarmy - 2000 Mercury Mountaineer - Transmissions & Drivetrains - 10/8/2013
    When i get up to around 40mph if i take my foot of the gas pedal and then press it again my vehicle only revs up?
    dont feel it shift into gear, all other gears work fine, i can drive it in 2 and i dont have that problem. Check engine light is not on.
     
    0 answer
  • aj
    aj - 1997 Mercury Mountaineer - Transmissions & Drivetrains - 9/10/2013
    Our Mountaineer failed to pass the smog test needed for upcoming registration renewal, what or where should we start to
    we start to correct this problem?
     
    • bear.1216
      9/10/2013 bear.1216
      Start by having the engine scanned for diagnostic trouble codes. If your check engine light is on you will fail. The light does not have to be on to have stored codes. Some parts stores will like Autozone will scan for free. If you had it tested and failed the test facility is required to give you a copy that states why it failed. You should read all of the paperwork from your test. Have your exhaust system checked out for any leaks or noise.
  • jeanniespeakman
    jeanniespeakman - 1993 Mercury Capri - Transmissions & Drivetrains - 8/4/2013
    Any idea why the dash gauge is flashing for the manual down shift button on the shift column. Unable to use downshift
    Would like to repair the flashing light on the gauge in the dash for the manual downshift button on the shift on the automatic transmission. Just began doing this
     
    0 answer