Question about 2003 Lincoln Town Car

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After I turn off my car, there is a loud sound like a motor running under the car. Is this from the compressor for the air suspension? I also get a roaring noise when I am driving that comes from the rear end. My mechanic said the wheel bearings are not leaking and look fine, but the air bag has some cracks in it. Is any of this related?

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  • WALITINA1 Sep 12, 2010

    The car has 82K miles and I read that rear end problems are not uncommon for the 2003 model year. There was a recall in 2004 for fleet vehicles only. I just returned from a long trip with a heavy load and that's when the noise from the rear end began. It's hard to find a good mechanic in Jacksonville and I only recently moved here. Should I replace air suspension with coil springs? My air bags have cracks in them ans probably need replacement soon.

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Then noise you hear after shutting off the car very well might be the air suspension compressor. The air ride system is still activated for a half hour after the vehicle has been shut off. The roaring noise from the rear could be a bad bearing. The rear axle seals don't always leak when a bearing goes out. So it's not a conclusive indication that they are good just because the seals aren't leaking. If your mechanic isn't too versed in differentials it may be advisable to seek an opinion of a reputable transmission shop (however, that may be a difficult task).

Posted on Sep 12, 2010

Testimonial: "Thanks for the great feedback. The rear noise is getting stronger and I do not want to damage the car, but I suspect the rear axle is the problem, too"

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No this is the cooling fan running still if pop hood you will see it is running its just way they are the roaring noise i would check the spider gears in the back or the drive shaft itself maybe needs oil in the pumpkin in the rear end

Posted on Sep 12, 2010

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If your not too familiar with air-suspension, send it in. But I can tell you that the air-compressor will not last too much longer if it runs constantly.
You need to go underneath and find out where the air is coming from while the compressor is running. It is possibly coming from a defective proportioning valve, bad air-line or defective air-bag.

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http://www.strutmasters.com/cadillac-suspension-parts-s/12.htm

I hope I was of some help

Good Luck!!!

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