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Recently noticed a small puddled of differential oil in the garage. I understand the driver's side leak is a typical issue on the C5. Just wondering if you guys that have dealt with this issue can tell anything from this pic. Thanks
Reach up onto the top of the diff on the drivers side and you will feel the vent cap. If there is oil on the top around the vent cap you will know what is leaking. Heat from differential operation causes the diff fluid and air on top of the fluid to expand. Vent cap is prone to sticking closed and allowing pressure to build up inside the housing instead of "venting" the expanded air. When the pressure gets high enough the cap releases and pukes out fluid along with the released pressure. The vent is NOT supposed to allow pressure to build up when it is working properly.
I will check it out and see. What would cause the vent cap to stick and stay closed?
Does this look like "leaky butt"?
The '00 I owned had the leaky differential seal three times and I do not recall the oily mess being that high on the differential.
Spray the whole thing with brake clean then watch for the leak.