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Re: 2003 Altima rear end noise
It is either a tire or you have a wheel bearing going bad. sounds like a bad bearing. you can usually narrow down side by driving and turning the side that is bad will get louder when weight shifts to that side and quieter when weight shifts off
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Usually a humming noise ( will get louder the faster you go ) is associated with a worn/bad wheel bearing. If the bearing is worn bad enough, it can also produce a wobble. Have the bearings checked on the side/wheel the problem is coming from
if the noise is coming from the bottom end of the motor then you have either bad connecting rod bearings or bad crank bearings.if when you snap the throttle you hear a double knock then its connecting rod bearing if not then its crank bearing.a collapsed piston can sound low in the engine and its usually a dull knock noise.if you have the engine running and the noise is there and you pull off one plug wire at a time(and reconnect it after checking) and the noise goes away or mostly goes away with the wire unhooked then the cylinder that the noise changed is the cylinder that has a bad piston.
Hello, Noise can be also from some sticky brake pad, or the bearings of the rear wheels, or even some spoiler, but you should have noticed it right after installing, and it is another sound. As for the differential, there might be a broken tooth, or again bearings, regardless of oil state.