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Mustang Forums
2011-2014 Mustangs
Driveline/Suspension
Rear axle vent leak-what is the solution?
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<blockquote data-quote="Tob" data-source="post: 10798063" data-attributes="member: 83412"><p>Corruptor - I've seen photos of the relocated vent (on 2012 models) as well as the vent still being located on the passenger side (early 2012 production maybe?). Either way, if I was you I would start by verifying that the fluid elevation within your factory housing/cover is indeed correct. If it was overfilled, when you remove the plug at the front of the "pumpkin" it'll leak out (at level ride height). Start there. If the fluid is at the proper elevation then check to see if your rattle cap is loose - as it should be. Not the threaded portion which extends into the axle tube but instead the crimped tin cap that resides atop of the short vertical tube.</p><p></p><p>If it doesn't jiggle a little then your housing may be building up pressure and then forcing fluid past the vent. The solution has to be somewhere within the above. Beyond that, a move to the factory SVT PP/Boss cover would definitely be a good move. Better cooling potential via the fins, easier drain/fill capability if you get it drilled/tapped on the bosses for plugs, and the relocated vent is a good idea as well.</p><p></p><p>If you'd rather have the catch can, there are plenty of nice billet cans that you could use with a simple bracket, hose, and replacing the factory vent with a simple barbed fitting (which gives you a spot to clamp the hose to). I'd definitely like to see what you end up doing and how well it works for you.</p><p></p><p>Good luck.</p><p></p><p>Tob</p></blockquote><p></p>
[QUOTE="Tob, post: 10798063, member: 83412"] Corruptor - I've seen photos of the relocated vent (on 2012 models) as well as the vent still being located on the passenger side (early 2012 production maybe?). Either way, if I was you I would start by verifying that the fluid elevation within your factory housing/cover is indeed correct. If it was overfilled, when you remove the plug at the front of the "pumpkin" it'll leak out (at level ride height). Start there. If the fluid is at the proper elevation then check to see if your rattle cap is loose - as it should be. Not the threaded portion which extends into the axle tube but instead the crimped tin cap that resides atop of the short vertical tube. If it doesn't jiggle a little then your housing may be building up pressure and then forcing fluid past the vent. The solution has to be somewhere within the above. Beyond that, a move to the factory SVT PP/Boss cover would definitely be a good move. Better cooling potential via the fins, easier drain/fill capability if you get it drilled/tapped on the bosses for plugs, and the relocated vent is a good idea as well. If you'd rather have the catch can, there are plenty of nice billet cans that you could use with a simple bracket, hose, and replacing the factory vent with a simple barbed fitting (which gives you a spot to clamp the hose to). I'd definitely like to see what you end up doing and how well it works for you. Good luck. Tob [/QUOTE]
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2011-2014 Mustangs
Driveline/Suspension
Rear axle vent leak-what is the solution?
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