Rear Axle Lubricant Leak Diagnosis: Notes

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Rear axle lubricant leaks can occur at the following locations:

Axle tube to differential carrier housing joint
Axle shaft oil seal
Axle housing porosity
Differential housing cover gasket
Drain plug
Fill plug
Pinion yoke oil seal
Vent tube