Jackrabbit41 Posted October 24, 2015 Share Posted October 24, 2015 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 Link to comment Share on other sites More sharing options...
Eagle Posted October 24, 2015 Share Posted October 24, 2015 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. Link to comment Share on other sites More sharing options...
Jackrabbit41 Posted October 25, 2015 Author Share Posted October 25, 2015 I'm going to drill and tap a hole for this and put a rubber hose up into the engine bay. [/url]">http://http://s1148.photobucket.com/user/Jackrabbit123/media/Mobile%20Uploads/image_zpsuculhh49.jpeg.html'> I might go back and get a small one though because I'm not sure that washer will fit on the housing Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 25, 2015 Share Posted October 25, 2015 That looks like a 1/4" NTP adapter. A 1/8" NPT hose adapter would be better. :thumbsup: Link to comment Share on other sites More sharing options...
Eagle Posted October 25, 2015 Share Posted October 25, 2015 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. Link to comment Share on other sites More sharing options...
Jackrabbit41 Posted October 26, 2015 Author Share Posted October 26, 2015 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. Link to comment Share on other sites More sharing options...
Jackrabbit41 Posted October 26, 2015 Author Share Posted October 26, 2015 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 Link to comment Share on other sites More sharing options...
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