The noise could be a failed wheel bearing,that could lead to the loss off a wheel.
It might be something minor but should be check immediately.
Nose can also come from a bad tire - tread "cupping", separated belts, lousy tread design that is always noisy, etc.
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The rear of a Ford Explorer may have a grinding noise when driving, because the muffler may have came loose. The u joint may also be loose and cause a grinding noise.
The 2003 Ford Taurus has 56.6 in. of rear shoulder room.
The 2006 Ford Taurus has 38.9 in. of rear leg room.
The 2004 Ford Taurus has 56.6 in. of rear shoulder room.
The 2012 Ford Taurus has 55.8 in. of rear hip room.
The 2011 Ford Taurus has 55.8 in. of rear hip room.
The 2010 Ford Taurus has 56.9 in. of rear shoulder room.
The 2003 Ford Taurus has 55.7 in. of rear hip room.
The 2009 Ford Taurus has 57.6 in. of rear shoulder room.
The 2006 Ford Taurus has 55.7 in. of rear hip room.
The 2006 Ford Taurus has 56.6 in. of rear shoulder room.
The 2009 Ford Taurus has 53.6 in. of rear hip room.