What are the chevy trailblazer front differential problems?

The most common problem with the Chevy TrailBlazer's front differential is usually caused by a bad seal on it. When one of the seals or gaskets fails then that is a place where leaks will form. When leaks happen that can lead to lower than average fuel levels and that can harm the gears. The gears in your differential need oil to help protect them from having direct metal on metal contact that can wear them down and damage them. If you get leaks and low fluid levels then they can get damaged and when that happens it is likely that the differential will fail and need to be replaced with a new one.