Some vehicles have a differential drain plug, if so then unscrew
the drain plug first. If not, then move on to step 2.
1.Unscrew the differential drain plug.
2.Unbolt the differential cover. (set a bucket under the
differnetail to catch the oil)
3. Get the gasket off of the differential and differential cover
with a razor blade and/or whiz wheel.
4. Replace the gasket with gasket sealer and/or the new
gasket.
5.Bolt the Differential cover back on.
6.Fill the differential up in the top drain until the fluid
starts to overflow.