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
3 people shared problem details
2002 Chevrolet Blazer- 4WD240,000
Rattling noise in differential, possibly rear axle, and ABS goes on irregularly.
2002 Chevrolet Blazer- 4WD180,000
Just started this a.m. Sounds like a hum, changes w/ speed variation and bumps. Have not yet checked fluids.
1998 Chevrolet Blazer- 4WD106,000
Replaced right front hub, humming noise is still there except when the four wheel drive is engaged.
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