1999 Chevy Suburban whinning nosie while driving

1999 CHEVROLET SUBURBAN
152,000 MILES • V8 • 4WD • AUTOMATIC
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MPH1975
  • MEMBER
  • 1 POST
when i driving down the road there is a whining nosie coming from the transfer case the front driveshaft isn't spining in 2hi but it makes the same whining noise like the truck is in 4wd. the 4wd does work well still. there isn't any banging or grinding when going into 4hi,4lo,2hi any ideas
Nov 26, 2008 at 7:58 AM
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JAMES W.
  • ✓Experienced Mechanic
  • 2,394 POSTS
Chevy transfer cases have a chain drive belt inside. This "belt" can wear to the point where it will rub against the inside of the case and make a winning noise. You check for slack by moving the shafts back and forth or drain the fluid looking for aluminum shavings.
Nov 26, 2008 at 10:59 AM
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