Just swapped my front axle in my jeep from a 2wd axle to the dana 30 and was wondering where they route the vent tube from the factory. It's a 2001.

 

It’s routed over the diff and then up the drivers side upper control arm.

 

It is secured in the engine compartment against the firewall on the driver's side by the brake booster.
Ignore the other breathers cause I decided to run them all up there.
LOL.
How you route it doesn't really matter just keep it away from the front driveshaft and not rubbing anything.

 

Thanks for the replies.