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Dorman 539-978 Suspension Ball Joint - Front Right Lower
Dorman 539-978 Ball Joint for Ram ProMaster City
Dorman 539-978 is a threaded suspension ball joint built as a direct replacement for the original equipment on specific vehicles. It is engineered and tested for dependable front suspension service on the Ram ProMaster City front right lower position.
Key Features
- Precision-engineered suspension ball joint for OE-style replacement
- Threaded, bolt-in mounting design
- Steel construction with gray finish
- Dust boot included for joint protection
- Premium suspension grade type
- Mounting hardware included
- Fits 2015-2022 Ram ProMaster City, front right lower
Detailed Description
This Dorman suspension ball joint, part number 539-978, is designed for the front right lower suspension position on 2015-2022 Ram ProMaster City models. The steel body, threaded design, and bolt-in mounting style support a secure OE-style replacement where the original joint has worn or failed. A dust boot is included to help protect the joint from road debris and moisture, while the premium-grade construction is intended to match the demands of daily driving and suspension movement. This part cross-references Mevotech Supreme MS25580 for the same application.
Common Repair Symptoms
- Front-end clunking or popping over bumps
- Loose or imprecise steering feel
- Uneven tire wear from worn suspension geometry
- Excessive play in the front right lower suspension joint
- Inspection failure caused by ball joint wear
Installation Notes and Tips
Fits 2015-2022 Ram ProMaster City, front right lower. Confirm the threaded, bolt-in mounting style and 3-hole mounting pattern before installation. The stud uses a pinch-style design with a 12 mm wrench size and 35.5 mm stud thread length. Because this is a suspension component, proper torque procedures and a post-installation alignment check are recommended after replacement.
Quality Assurance
Dorman designs this ball joint as a replacement for the original equipment on specific applications and subjects it to testing for reliable service. Part number 539-978 is built to meet the needs of the Ram ProMaster City front suspension where a direct-fit replacement is required.
| Brand | Dorman |
|---|---|
| Part Number | 539-978 |
| Material | Acero |
| Material | Steel |
| Maximum Outside Diameter | 61 |
| Length | 111 |
| Color | Gray |
| Color | Gris |
| Castle Nut Included | No |
| Castle Nut Included | Non |
| Grease Fitting Included | No |
| Grease Fitting Included | Non |
| Suspension Grade Type | Premium |
| Bushings Included | No |
| Bushings Included | Non |
| Dust Boot Included | Oui |
| Dust Boot Included | Sí |
| Dust Boot Included | Yes |
| Ball Joint Assembly | Oui |
| Ball Joint Assembly | Sí |
| Ball Joint Assembly | Yes |
| Width | 59 |
| Type | Roscado |
| Type | Threaded |
| Cotter Pin Included | No |
| Cotter Pin Included | Non |
| Cotter Pin Hole | No |
| Cotter Pin Hole | Non |
| Mounting Hardware Included | Oui |
| Mounting Hardware Included | Sí |
| Mounting Hardware Included | Yes |
| Washers Included | No |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2022 | Ram | ProMaster City | Front Right Lower | |
| 2021 | Ram | ProMaster City | Front Right Lower | |
| 2020 | Ram | ProMaster City | Front Right Lower | |
| 2019 | Ram | ProMaster City | Front Right Lower | |
| 2018 | Ram | ProMaster City | Front Right Lower | |
| 2017 | Ram | ProMaster City | Front Right Lower | |
| 2016 | Ram | ProMaster City | Front Right Lower | |
| 2015 | Ram | ProMaster City | Front Right Lower |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.