GEN 1 Diff vents

Due to the areas I will frequent, does anyone know if the front and rear diff vents are 1 way. Basically if I cross water for an extended amount of time do I need to worry about flooding out my diff's. Older trucks I would just get a hose vent set up and run the hose somewhere up high so I dont have to worry about it. Thanks

extend em with the hose kit

The front is right by the master cylinder if you get that deep in water the motor will be full of water already

Thanks for the info

The rear vent extends only to the bottom of the bed and is just an open hose. I extended mine all the way to the highest point on the firewall in the engine compartment and put a filter on it. That hose is way, way too short.