Diff PCV valve

[Jackrabbit41]

So when I was welding on my homemade"truss" some how or another a bead ended up in the vent hole in my HP dana 30. The shop that put 4.10s in it noticed that and told me to put a pressure control valve mounted backwards on the diff cover so that the pressure can escape because it's a live axle. How would I go about doing this the best way? Or what should I do? Thanks

[Eagle]

Why not redrill and tap the hole where it's supposed to be?

 

Is the shop talking about a one-way check valve? That won't work -- when the diff heats up it will force out air (and/or gear oil), but if air can't get back in through the vent it'll suck in through the axle seals. I'm thinking that's not a good thing.

[Jackrabbit41]

I'm going to drill and tap a hole for this and put a rubber hose up into the engine bay.

 

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I might go back and get a small one though because I'm not sure that washer will fit on the housing 

[HOrnbrod]

That looks like a 1/4" NTP adapter. A 1/8" NPT hose adapter would be better.   :thumbsup:

[Eagle]

I'm going to drill and tap a hole for this and put a rubber hose up into the engine bay.

Now you're on the right track. But there should already be a hose in your engine compartment for venting the front differential. It should come up on the driver's side, somewhere in the vicinity of the brake booster. It'll be black, with a white nylon thingie in the upper end.

[Jackrabbit41]

That looks like a 1/4" NTP adapter. A 1/8" NPT hose adapter would be better. :thumbsup:

Ya I'm going to go get a smaller one.

[Jackrabbit41]

 

I'm going to drill and tap a hole for this and put a rubber hose up into the engine bay.

Now you're on the right track. But there should already be a hose in your engine compartment for venting the front differential. It should come up on the driver's side, somewhere in the vicinity of the brake booster. It'll be black, with a white nylon thingie in the upper end.

Thanks I'll look for that