Drive Pinion Seal
WARNING: This page is about a different car, the 2024 Ford Transit-350 HD, 2024 Ford Transit-350, 2024 Ford Transit-250, and 2024 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
Leaks at the drive pinion seal originate from the following causes:
- Damaged seal
- Worn seal surface on Pinion Nut
The service kit available comes with seal, nut, and deflector.
A new drive pinion seal must be installed if any of these conditions exist.
- Any damage to the seal bore (dings, dents, gouges or other imperfections) distorts the seal casing and allows leakage past the outer edge of the drive pinion seal.
- The drive pinion seal can be torn, cut or gouged if it is not installed correctly. the spring that holds the drive pinion seal against the pinion flange may be knocked out and allow fluid to pass the lip.
- Metal chips trapped at the sealing lip can cause oil leaks. These can cause a wear groove on the drive pinion flange and result in pinion seal wear.
- When a seal leak occurs, install a new drive pinion seal and check the vent to make sure it is clean and free of foreign material.