Question about 2004 GMC Envoy
I'd say yes. The differential fluid is often overlooked by oil change technicians, even though it's something that should be topped off periodically.
It probably would cost more than that to repair it once it wears out.
Axle Housing Assembly Removal & Installation To Remove:
I think that changing the fluid would take about an hour, and depending on the garage, and the labor rate, that they might elect to take the rear cover off of the differential, and drain it that way and replace the fluid once it was put back on. He could inspect the gears while the cover was off and tell you how bad it was.'
Do you hear any clunking or gear mesh noises from the rear when putting it in gear or running the vehicle?
Some mechanics would simply top off the fluid and wait until it wears out, which could be several thousand miles in the future.
Use gear oil for it of the recommended viscosity in the service manual.
Generally thicker than motor oil.
So, adding fluid would cost only the amount of the fluid plus some labor.
A bottle of fluid might cost $9.99 or so depending on where you get it.
You might be able to do this yourself if you crawl under there, remove the fill plug at the top, and just add gear oil. If there isn't enough room you might drive it up on some ramps and then crawl under there.
Posted on Jul 29, 2010
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Posted on Jan 02, 2017
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