- First Name
- Dimitar
- Joined
- Oct 26, 2020
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- 15
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- 370
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- 742
- Location
- Orange County, CA
- Vehicle(s)
- 21 Bronco
- Your Bronco Model
- Badlands
- Thread starter
- #1
I recently spotted a leak in my rear axle.
As it turns out this is the axle vent which relieves pressure from the differential. I’ve seen several threads on this topic so here is the solution.
The service manual states that if you disturb the vent valve you should replace it. I’ll leave that up to you. A new valve costs $8 and has this part #: BC3Z4022A.
1. Clean up the axle and remove the hose.
2. Unclip and the fender liner to expose the other end of the line. You don’t need to remove the whole liner from the wheel well
As you can see, in my case it’s covered in dust and dirt from using my truck as god intended. I cleaned up, including vacuuming the liner padding which was soaked in dust.
3. Inspect the hose for blockages (you can stick a toothpick on each end to see if there’s any obstructions). Take your compressor and blow some air in it to clear out anything else.
4. Replace the vent valve and the plug in the hose. You add a little thread lock. I also used a hose clamp for good measure.
That’s It. If you don’t want to replace the valve, you can gently probe it to remove any blockage.
As it turns out this is the axle vent which relieves pressure from the differential. I’ve seen several threads on this topic so here is the solution.
The service manual states that if you disturb the vent valve you should replace it. I’ll leave that up to you. A new valve costs $8 and has this part #: BC3Z4022A.
1. Clean up the axle and remove the hose.
2. Unclip and the fender liner to expose the other end of the line. You don’t need to remove the whole liner from the wheel well
As you can see, in my case it’s covered in dust and dirt from using my truck as god intended. I cleaned up, including vacuuming the liner padding which was soaked in dust.
3. Inspect the hose for blockages (you can stick a toothpick on each end to see if there’s any obstructions). Take your compressor and blow some air in it to clear out anything else.
4. Replace the vent valve and the plug in the hose. You add a little thread lock. I also used a hose clamp for good measure.
That’s It. If you don’t want to replace the valve, you can gently probe it to remove any blockage.
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