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Mercury transmissions & drivetrains repair questions and answers

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  • AutoMD User
    AutoMD User - 1999 Mercury Villager - Transmissions & Drivetrains - 4/23/2014
    Shifting questions. Our van seems to be stuck in limp mode at this time.
    Will a catalytic converter keep the van from not shifting into higher gears?
     
    • HouseCallAuto
      4/9/2014 HouseCallAuto
      Have to plug in a code reader and see what fault codes are stored. Checking for codes cannot be skipped if you want to diagnose this.
      HouseCallAuto
      4/23/2014 AutoMD User
      The only code that is coming up on our scanner is for the knock sensor.
    • HouseCallAuto
      4/23/2014 HouseCallAuto
      Erase the code and see if it affects the tranny shifting. On a Toyota, a knock sensor code stored will cause the overdrive to be disabled. I know this from a recent repair I did on an '04 Camry. As soon as I replaced the knock sensor it solved the overdrive problem.
      HouseCallAuto
      4/24/2014 AutoMD User
      How do I erase the code on the Villager?
      HouseCallAuto
      4/24/2014 HouseCallAuto
      your scanner / code reader is capable of a erasing codes. That is why you have it
  • AutoMD Member
    AutoMD Member - 1996 Mercury Cougar - Transmissions & Drivetrains - 4/21/2014
    Why does my transmission leak fluid at highway speeds
    only at 60-65 or better
     
    • Matt
      4/21/2014 Matt
      No leaks while running in general? Have you noticed this only happens while on a down grade or noticed any vibrations at those speeds?
  • AutoMD Member
    AutoMD Member - 1996 Mercury Cougar - Transmissions & Drivetrains - 4/21/2014
    Leaks tranny fluid at hiway speeds
    usually starts at60-65 mph
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1996 Mercury Cougar - Transmissions & Drivetrains - 4/21/2014
    Why does my transmission leak fluid at highway speeds
    only at 60-65 or better
     
    0 answer
  • AutoMD User
    AutoMD User - 1999 Mercury Villager - Transmissions & Drivetrains - 4/6/2014
    Will a knock sensor keep our van from shifting into the higher gears?
    We have replaced the Distributor because it showed that code to replace the Distributor. Now our code scanner is showing the knock sensor.
     
    • Pepe
      4/6/2014 Pepe
      If the code for knock sensor happened after replacing the distributor then the most likely reason is the ignition timing. Also did you double check the plug wires to make sure the firing order is right?
      Pepe
      4/14/2014 AutoMD User
      Thanks. We will check the ignition timing. The plug wires have been checked and the firing order is correct.
    • HouseCallAuto
      4/6/2014 HouseCallAuto
      I recently had a 2002 Toyota that had a bad knock sensor and while the sensor wqs bad and the pwner was driving the car the overdrive would not engage with the knock sensor code present. As soon as I replaced the knock sensor the overdrive worked normal. I do not know what makes and models out there also have this programming built into their computer. Of course set the timing with a timing light accordiong to the printed procedure, do not assume you know how to do it.
  • AutoMD User
    AutoMD User - 1999 Mercury Villager - Transmissions & Drivetrains - 4/3/2014
    Shifting issues. Stuck in lower gears.
    The van has 118000 miles. We replaced the distributor and the van still will not shift into the higher gears. We do not show any codes at this time.
     
    0 answer
  • 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.