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| REAR AXLE VENT – OIL LEAK |
| FORD: | 2011-2014 Mustang |
2011-2014 Mustang vehicles equipped with a 3.7L, 5.0L 4V DOHC and 5.0L 4V DOHC SEFI with a rear axle vent located on the left axle tube may exhibit a fluid leak from the rear axle vent.
SERVICE PROCEDURE
- Inspect the rear axle assembly for an oil leak from the rattle cap vent located on the left axle tube of the vehicle. Is there evidence of oil leakage around the rattle cap?
- Yes – install a new vent kit following the instructions included in the kit.
- No – this article does not apply. Refer to Workshop Manual (WSM) for normal diagnosis.
| PART NUMBER | PART NAME |
|---|---|
| DR3Z-4022-A | Vent Kit |
XY-75W140-QL  |
Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant |
| XL-3 |
Motorcraft Additive Friction Modifier |
| PM4A |
Motorcraft Metal Brake Parts Cleaner |
I have brought my Mustang into the dealership (2014 V6) twice now and it’s still leaking. I will be bringing it back for a third time next Monday. They replaced the vent tube (kit) the first time, a week later — another little pool of fluid in my garage. Brought it back, they had no idea, sent it to Ford service, they added a “super concentrated gear oil” that was supposed to seal and complete the repair. It has not. Still the same size pool of gear oil in my garage. So, here we go again! What is it they’re missing? I’m not above telling the service center how to “do their job” as long as I know what I’m talking about first! Thank you!