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Old Nov 7, 2022 | 08:59 PM
  #1  
SpeedThrills's Avatar
SpeedThrills
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Vent Tube Thread

I have a 9" and I have no idea what it's originally out of.

Someone used a solid bolt to hold the brake line vee to it. Now, of course, the axle is not vented.

All of the vent bolts that I have been able to find (Ford and Mopar) are 7/16-20, and the bolt I took out is 7/16-14.

Did Ford ever make one with 14 t.p.i.? I can't imagine that someone would change the thread and ultimately defeat the vent by using a solid bolt.

I'd prefer the type that has a cap on it, as opposed to the type that has a nipple with a rubber hose. It's in a street/strip Duster.

 
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Old Nov 8, 2022 | 10:43 AM
  #2  
f5fordgirl's Avatar
f5fordgirl
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That housing isn't very thick, and should've been 7/16 20, so it wouldn't take much to twist a 7/16 14 bolt into it, might try a 7/16 20 and some lock tight, see if it will snug down tight.
 
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Old Nov 8, 2022 | 04:24 PM
  #3  
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SpeedThrills
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Originally Posted by f5fordgirl
That housing isn't very thick, and should've been 7/16 20, so it wouldn't take much to twist a 7/16 14 bolt into it, might try a 7/16 20 and some lock tight, see if it will snug down tight.
Thanks.
​​​​​​I just ordered this: Mopar Rearend Vent Bolt
I'll carefully add some weld to it, get it turned to size on a lathe, and then run a die on it to 14 t.p.i.
 
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