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.
| DR3Z-4022-A | Vent Kit |
| XY-75W140-QL
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant |
XL-3
Genuine Ford Fluid XL-3 Friction Modifier Additive - 4 oz.
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | Motorcraft Additive Friction Modifier |
| PM4A
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API | Motorcraft Metal Brake Parts Cleaner |
- Super-slick long lasting lubricant
- Insures less gear noise and longer bearing life
- Stands up to high temperatures while maintaining lubricity
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
- For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API
- Made in United States
- Package height :8.89 cm
- Package length :28.956 cm
- Package width :8.89 cm
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API
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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!