2002 Chevy Avalanche make a whining noise when in 4 wheel o

2002 CHEVROLET AVALANCHE
12,500 MILES • V8 • 4WD • AUTOMATIC
Avatar
PRAIRIEHOME
  • MEMBER
  • 1 POST
Drives fine, but makes a whining humming noise
when in all wheel or four wheel drive. Sound
comes from front of the truck. Seems to be louder
when accelerating. What is it ? is it a problem ?
Feb 23, 2009 at 1:00 PM
Advertisement
Avatar
RHALL77
  • ✓ASE Certified Mechanic
  • 3,361 POSTS
  • ASE Certified Mechanic
check your front diff fluid. sounds like you may have some bad bearing in the diff. there will be metal in the fluid if there is
Feb 25, 2009 at 4:15 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.