Corvette C5 2004 Owners Manual PDF | Page 289

Rear Axle
When to Check Lubricant
It is not necessary to regularly check rear axle fluid
unless you suspect there is a leak or you hear an
unusual noise. A fluid loss could indicate a problem.
Have it inspected and repaired.
How to Check Lubricant
To get an accurate reading, the vehicle should be on a
level surface.
If the level is below the bottom of the filler plug hole,
you will need to add some lubricant. Add enough
lubricant to raise the level to the bottom of the filler
plug hole.
What to Use
To add lubricant when the level is low, use SAE 75W-90
Synthetic Gear Lubricant (GM Part No. 12378261) or
equivalent meeting GM Specification 9986115.
To completely refill after draining, add 4 ounces
(118 ml) of Limited-Slip Differential Lubricant Additive
(GM Part No. 1052358) or equivalent. Then fill to the
bottom of the filler plug hole with the Synthetic Gear
Lubricant.
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Corvette C5 2004 Owners Manual Summary of Content

Rear AxleWhen to Check LubricantIt is not necessary to regularly check rear axle uidunless you suspect there is a leak or you hear anunusual noise. A uid loss could indicate a problem.Have it inspected and repaired.How to Check LubricantTo get an accurate reading, the vehicle should be on alevel surface.If the level is below the bottom of the ller plug hole,you will need to add some lubricant. Add enoughlubricant to raise the level to the bottom of the llerplug hole.What to UseTo add lubricant when the level is low, use SAE 75W-90Synthetic Gear Lubricant (GM Part No. 12378261) orequivalent meeting GM Specication 9986115.To completely rell after draining, add 4 ounces(118 ml) of Limited-Slip Differential Lubricant Additive(GM Part No. 1052358) or equivalent. Then ll to thebottom of the ller plug hole with the Synthetic GearLubricant.5-47