Hi guys ? gals,
I was reading an article about military vehicles and it made an interesting statement about using pressure vented differentials. I assume that all the military vents lines use to accomplish this would be a pressure activated / vacuum relieved inline valve. This would put the differential under a small positive pressure while running to prevent water from being able to get into the diffs while submerged but would allow air to re-enter the system after the vehicle started to cool off. It sounds like a perfect solution for preventing water getting into the diffs.
Do we have any "Motor Pool" mechanics on the forum that can give a little better insight into this? Even if it's a "bit pricey" it sounds like an option to consider. I reviewed the search function and found noting on this topic. If someone knows of one please post it... Thanks... Mike

 

There's a thread on this forum somewhere that talked about a sealed diff vent system - I think the system is geared more towards ATVs. I couldn't find it either but I know it's there.

I extended and relocated my vent lines. The front diff vent is under the hood by the battery, the rear diff vent is behind the rear tail light. Still need to extend the transmission and transfer case vents. I figured that unless I put in a snorkel, there's a whole lot else that will get wet before the diffs will.