Front axel
On the front axel on my coach there is sight glasses with fluid , what type of fluid does this require, how do I add it ?
Forum Discussion
On my wet hubs, the circle line is the minimum oil fill. There is a plug in the middle where you add the fluid. You cannot overfill it since any excess would run out that hole with the plug removed to fill it. Mine uses the 80/90 weight wheel bearing oil.
