Front/Rear Differential May Develop Noise Due to Worn Bearings on Chevrolet Blazer

The front or rear differential may develop an abnormal noise due to worn bearings or another internal fault. Our technicians tell us that a complete overhaul of the affected differential is commonly necessary to correct this condition.

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Average mileage: 178,600 (106,000–260,000)
Drive Train affected: 4WD
4 model years affected: 1993, 1994, 1998, 2002
9 people reported this problem
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problem details
2002 Chevrolet Blazer - 4WD 240,000 mi,
Rattling noise in differential, possibly rear axle, and ABS goes on irregularly.
2002 Chevrolet Blazer - 4WD 180,000 mi,
Just started this a.m. Sounds like a hum, changes w/ speed variation and bumps. Have not yet checked fluids.
1998 Chevrolet Blazer - 4WD 106,000 mi,
Replaced right front hub, humming noise is still there except when the four wheel drive is engaged.