Question about Mitsubishi Galant

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Bad front end vibration while in gear at idle only makes dash and floorboard vibrate

2001 4 door sedan with 75K miles. Top on dash has cracked due to overexposure to sun,otherwise car beautifully maintained and runs very well. Front end vibrates while at idle or above idle while the car is in gear only. Once movement starts,forward or reverse, the vibration immediately stops. If shifted to neutral while at idle the vibration stops. All fluid levels fine, no overheat, no leaks, no funny noises. Believe it may be some kind of dampner which can not handle the torque at idle but handles the speed while in motion. What do you think? Could I fix it myself? Will it cost a fortune?. Many,many thanks...John

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  • John D. Brown
    John D. Brown May 06, 2013

    Thank you Bill.....I forgot one important spec. This is an automatic transmission. Sorry for the ommission.

  • Bill Boyd May 06, 2013

    What a difference that makes. Now only in idle means that the transmission is spinning the torque converter all the time which in turn is spinning all the gears in the transmission. As they are planetry and sun gears on bearings and are actuated by clutch packs and bands the problem is narrowied down to bearings on the input shaft of the transmission. Check the oil for particulate and burning Dark brown instead of cherry red.

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When you are in gear at idle with your foot on the clutch you have placed an axial load on the crank which is pushed forward in the main bearings against a thrust bearing. I suspect a failing thrust face on this bearing as it only works under a clutch release load. The only other point that is under load is the clutch throw out bearing but if that is failing you should be hearing a tinny type of rattle when you have the foot on the clutch

Posted on May 05, 2013

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SOURCE: 95 ford explorer, grinding noise/vibration at slow speeds.

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SOURCE: Maxima - terrible vibrations in low speed

A bad tire, a loose wheel, a loose tie rod end, a bent rim, (tire balance at higher speeds), a piece of rust or whatever caught between the rim and brake rotor, or between the brake rotor and hub. Have you done anything to it prior to this starting?

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SOURCE: low level growling noise at rt. front wheel

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SOURCE: Vibration through the car Transmission-motor Linkage?

Check to make sure both headlights are tight,,,when it rattles at idle go feel the headlight and hold it and see if the noise and vibration goes away,sometimes the headlight has too much clearance and causes a massive vibration,,if thats not it try...loosening all the motor mounts and rock the car back and forth and them retighten them,it reseetles the mounts and sometimes fixes the issue,,also check the lower engine and trans mounts for wear.

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SOURCE: 2002 Dodge Grand Caravan, 69k miles, vibration at idle in D

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