Rear Axle - Chevrolet 2006 Corvette Owner's Manual

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 Axle Lubricant (GM Part No. U.S. 12378261, in
Canada 10953455) meeting GM Specification 9986115.
To completely refill after draining, add 4 ounces (118 ml)
of Limited-Slip Axle Lubricant Additive (GM Part No.
U.S. 1052358, in Canada 992694). Then fill to the bottom
of the filler plug hole with the Synthetic Gear Lubricant.
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