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Hi everyone,
I’ve worked on quite a few FWD vehicles but not much experience here on 4×4. When driving a 2002 explorer, and turning to the right, there is a distinct noise coming from the back left (or maybe back center) that sounds kind of like kind of like a rotor being put on a lathe (not exactly like metal grinding but like a constant high pitched whining noise).
Here is the kicker – it only does this when accelerating or having my foot on the throttle. In other words, If i am turning right, on a sharp curve, going about 60 mph, I can hear the noise as long as I have my foot on the throttle. The moment I take my foot off that pedal though going around that curve at the same speed, the noise goes away. This leads me to think the noise may be in the differential? When I was told of the noise, I at first thought wheel bearing or maybe a shaft, but I’ve never heard this distinct noise come from a bearing. Also the wheel has no play at 3/9 or 6/12.
Any suggestions?Thank you,
Ryan
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Replies
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Bearings will usually make a horrible amount of noise before there is any play. By the time there is play in them they tend to be so far gone it’s not even funny. If you are accelerating in a right turn the left side would load up with weight and make more noise, so it is possible the noise is there under normal turns but because the extra weight isn’t on it you just can’t hear or identify it.
Bearings usually make a wuurrrr type noise when they’ve gone south. Getting louder as speed increases.
It might also be worth looking at the brakes and related components as the hub will flex a certain amount when you turn. So two things that might not otherwise be touching may under certain conditions.
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