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Suspected Differential problem

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Old Feb 23, 2015 | 10:41 PM
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HardlineZX
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Suspected Differential problem

Noticing a vibration and noise from the vehicle, an 03 Expy, when at interstate speeds. It is much more pronounced when in 4WD Auto than when in 2WD. I suspect it is a failing bearing or universal joint in the front driveline. Any good ways to test this that don't involve me laying in snow?
 
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Old Feb 24, 2015 | 10:12 AM
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I can say with 99.99% probability that it is the u-joints in the front drive shaft. When in 2WD the front drive shaft does not turn, when in A4WD it does.
 
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