Question about 1991 Lincoln Town Car

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1990 Lincoln Town Car Transmission

I drive a 1990 Lincoln Town Car with a developing transmission problem. The car was about a pint down. Over the summer I inadvertently put in about 4 tablespoons of type F steering wheel fluid instead of Mercon, if that might be a long term cause. The original defective transmission was changed at 20K. The fluid was suction flushed at 80K. It's at 115k right now, good maintenance and driving habits throughout. The problem is in the last week it is not shifting that easily into second, especially when cold. After it warms up, the car shifts into second at 30 mph OK most of the time, unless going up hill, and then stays stuck in second. It also shifts into 3rd at 38 mph most of the time. But lately, it won't shift into overdrive above 40 mph and slips and revs without acceleration. What should I do to fix this? Many thanks in advance.

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  • deandelbene Dec 16, 2008

    Well, I brought it in to a mechanic. He found that the rubber grommet holding the cable into the transmission had cracked and fallen out. He put a grommet/bushing in. The car now shifts OK through third, but at 40 mph when car shifts into overdrive, the engine revs still, so I'm guessing the cable pps has to be readjusted. He'll try again after the snow clears.

  • Anonymous Mar 29, 2014

    When car is cold 1 and 2nd shift very late (4000 rpm). The car also makes a noise after 30 mph. I do not think it is a wheel hub assembly because both were changed in January 2013.Shifting gets better after transmission heats up.

  • Anonymous Mar 30, 2014

    Transmission shutters - feels like its going in and out of lockup. Most noticeable at steady hwy speeds (of 65 thru 85 mph)? Some times it happens when shifting into 3rd and 4th gear.

  • Jerry Samouce
    Jerry Samouce Sep 11, 2015

    We just fixed this...
    You are not going to believe the answer...

    It is your traction control system.
    When your wheels spin at different rates the trac control thinks you are on ice and disengages the engine at 40+ MPH down to 35mph so that you can regain traction.

    But in the older town cars this system becomes hyper sensitive.

    Let me guess.. it never happens when you have a passenger over 50 pounds sitting on the passengers side... right?
    And it only happens when you are driving alone and low on gas... right?

    The weight of the gas when over 1/2 or the weight of the passenger puts more weight on the passenger side of the car keeping those tires from spinning faster then on the drivers side.

    So... we simply spent $6 on a 50# concrete deck footing placed behind the front passengers seat and $5 on a load strap to ancor it to the seats steel undercarriage for safety in a roll over acedent.

    Problem solved....



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  • 39 Answers

You my friend have a problem. I suggest a trusted transmission shop or a salvbage yard replacement.

Posted on Dec 11, 2008


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