I have humming in front diff, what is it?

2002 CHEVROLET SILVERADO
11,945 MILES
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ONEAGLESWINGS
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Hi, I got a 2002 chevy Silverado 1500 4x4. Yesterday, my font diff started to hum. I check the hubs and U-joints and there fine. I am preety sure its a bearing, but not sure where. I am thinking it is probally the bearings inside the front diff. If I put the truck in 2 HI there is no sound. What do you think?
Sep 11, 2011 at 8:06 PM
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PROMECHANIC
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You are most likely right, but just to make sure that the driveline is not missing any weights or anything. Also, check the u-joints very carefully again. You don't want to get into the diff just to find out that it is fine.
Sep 11, 2011 at 8:24 PM