Question about 2003 Dodge Neon

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The car vibrates when in drive while at a stop. What would cause this ?

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Vibration at idle brings to mind a few suspects:

transmission mount(s) broken/missing
transmission internally worn
motor mount(s) broken/missing

(1) transmission internally worn or transmission mount broken/missing - test this by shifting into neutral at the next stop light. If the vibration disappears when you disengage the transmission, then the transmission is the source of the vibration. You'll have to inspect the transmission mounts - if they're ok, then the transmission is internally worn and can no longer smoothly "slip" while idling in drive.
(2) motor mount broken/missing - also test this by shifting into neutral at the next stop light. If the vibration persists, then the transmission is exonerated, and the vibration is coming from (under) the engine. The rubber part of motor mounts commonly crack/break and or pop out and are lost.

A photo of the front motor mount for the 2003 Dodge Neon:


The car vibrates when in drive while at a stop. - 10_18_2011_3_35_36_am.jpeg

Posted on Oct 18, 2011

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  • Eric Damon Oct 18, 2011

    Thank you Archaeology. How can I check /test the transmission/motor mounts to find which are bad if any ?

  • Archaeology
    Archaeology Oct 20, 2011

    Checking motor mounts/transmission mounts is a matter of jacking the car up (onto at least two jack stands), putting down a sheet of cardboard to lie upon, sliding yourself under the car, and using your brightest utility light or flashlight, look for and feel for any/all connections between the engine and the frame for motor mounts, and any/all connections between the transmission and frame for transmission mounts.
    Sometimes you can see half of a motor mount from looking down into an engine, and then visualize the other half of the motor mount from below.
    Replacing these is easier than one might think - you jack up the engine or transmission (really just support it with a hydraulic jack using a wood scrap 2x4 as a protective pad between the jack and engine or transmission), unbolt the offending support, slide it out, slide in & bolt down the new support - then lower the engine/****** onto the new support.

  • Eric Damon Oct 21, 2011

    Hi Archaeology . Sorry, I should have been clearer. I do know how to find and replace the motor mounts and transmission mounts on my car. I dont know how to tell if they are bad or not. How do you tell ?

  • Archaeology
    Archaeology Oct 22, 2011

    To check on the integrity of a motor/transmission mount, I jack up the vehicle, get it even on two jack stands, start up the car and look/listen/feel each mount. If its making audible noise or vibrating too much or actually looks like it has seen better days when the engine is idling, then it makes my to-do list. If it's difficult to tell where the noise is coming from, I'll use a mechanic's stethoscope (a modest-cost unit can be had at Harbor Frieght Tools,http://www.harborfreight.com), which screens out sounds coming from parts other than the part being touched by the end of the stethoscope. If you have one of these tools, the first thing to auscultate (listen to) is the clicking of all your fuel injectors - getting to know what they sound like when they're operating perfectly at idle allows one to quickly and easily eliminate this possible cause of performance issues.

  • Eric Damon Nov 05, 2011

    How can you tell by looking at the motor mounts and tranmission mounts if they are bad or not ?
    I know how to find motor mounts and transmission mounts on my car, but need to know which ones are bad.

  • Archaeology
    Archaeology Nov 21, 2011

    The way to tell if a motor/transmission mount is bad by looking at it, is that it may actually look distorted/bent. But most often, the rubber part of the mount (there is usually a metal frame holding a rubber part), will look destroyed/deteriorated, or may be missing entirely. If you walk along any road, you'll find large, oddly-shaped rubber objects. These are the rubber components of motor/transmission mounts that have vibrated loose and fallen out of the engine compartments of passing vehicles. Once the rubber part of a metal/rubber mount is gone/deteriorated, then the noise and/or vibration will begin.

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Needs tune up, maintenance, has a vacuum leak

Posted on Nov 01, 2018

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Broken motor mount..

Posted on Nov 01, 2018

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