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Old 05-19-14, 11:00 AM   #1
E36M3
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Default Expertise Needed

I bought a 1994 SC4 with 140k miles. When I left off the gas while driving I hear a slight droning noise from underneath but it goes away as soon as I give gas. There no vibrations or shaking just that slight drone. My guess is the diff maybe low on oil? Please share your thoughts. Appreciate it!
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Old 05-20-14, 02:45 PM   #2
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Yeah could be that.
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Old 05-20-14, 03:57 PM   #3
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Dif will be ur problem a bazillion percent of the time with these symptoms. However sometimes it could be a bearing and you simply can't hear it when pressing on throttle. Also tires can make noises but once again it would be a constant sound.
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Old 05-20-14, 05:12 PM   #4
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Put you car in neutral on the highway, if the noise goes away it's most likely the pinion bearing.

Not terrible to do.
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Old 05-20-14, 09:49 PM   #5
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Quote:
Originally Posted by jimbow View Post
Put you car in neutral on the highway, if the noise goes away it's most likely the pinion bearing.

Not terrible to do.
i thought it's very terrible to put auto cars in neutral when moving, especially at high speeds?
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Old 05-20-14, 09:49 PM
 
 
 
 
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