2003 Chevy Silverado rear end chatter

2003 CHEVROLET SILVERADO
Avatar
LAKOTA LAWN
  • MEMBER
  • 2 POSTS
Drive Train Axles Bearings problem
2003 Chevy Silverado V8 Four Wheel Drive Automatic 71k miles

limited slip differential locks in to give me traction but doesn't like to unllock to let me turn. told i need a fluid flush but need to find out if i need a synthetic gear oil. ser#1gchk29u63e189002
Jun 19, 2010 at 11:01 PM
Advertisement
Avatar
02REDCAMARO
  • ✓ASE Certified Mechanic
  • 65 POSTS
  • ASE Certified Mechanic
You probably don't need a flush, but pull the rear diff cover off, drain all the gear oil, use a gasket on the cover, then I recommend replacing with Mobil 1 Synthetic gear oil AND a bottle of limited slip diff lube from a GM dealer. This should be done every 30-40K miles or so, so you are overdue. If you buy a new cover with a drain plug, then you won't have to pull the whole cover off again. When you pull the cover off, you can check for any worn gears, metal in the bottom, damage, etc. Mobil 1 is spendy, but GOOD.
Jun 20, 2010 at 4:20 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.