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Delphi TC4257 Suspension Ball Joint - Front Upper
| Brand | Delphi TC4257 |
|---|---|
| Position | Front Upper |
| Maximum Outside Diameter | 2.059 |
| Maximum Outside Diameter | 52.30 |
| 10667 | No |
| Thread Direction | Counterclockwise (left) |
| Reinforced | No |
| Pre-Greased | Yes |
| Castle Nut Included | No |
| Grease Fitting Included | No |
| Suspension Grade Type | Standard replacement |
| Bushings Included | No |
| Dust Boot Included | Yes |
| Ball Joint Assembly | Yes |
| Type | Standard |
| Cotter Pin Included | No |
| Cotter Pin Hole | No |
| Mounting Hardware Included | Yes |
| Washers Included | No |
| Grade Type | Standard replacement |
| Adjustable | No |
| Bearing Type | Plastic |
| Greaseable | No |
| Stud Thread Length | 1.575 |
| Stud Thread Length | 40.00 |
| Steering Type | Power |
| Wrench Size | 8 mm |
| Stud Type | Threaded |
| Mounting Type | Press-in |
| Dust Boot Material | Rubber |
| Mounting Bolts Included | No |
| Mount Plate Included | No |
| Fits | Ford and Mercury · 14 vehicles |
OE expertise. Delphi brings original-equipment know-how to its aftermarket steering parts.
Extreme testing. Built to handle harsh temperatures and 720 hours of salt spray.
Front upper fitment. Standard replacement ball joint with press-in mounting and pre-greased design.
Cross-references Dorman - Premium BJ85026XL, Mevotech Supreme MK500014 and MOOG Chassis Products K500014 for the same application. See all 6.
Delphi TC4257 Front Upper Ball Joint
Delphi TC4257 is a standard replacement suspension ball joint for the front upper position on select Ford, Mercury applications. Built with OE-focused dimensional and material analysis, it is made for direct replacement service on vehicles that need precise steering and suspension articulation.
Compatible with 2006-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2006-2010 Mercury Mountaineer in the front upper position, this Delphi ball joint is pre-greased and supplied as a complete ball joint assembly with a dust boot and mounting hardware.
Key Features
- Part number: TC4257
- Front upper suspension ball joint
- Standard replacement grade
- Pre-greased for service-ready installation
- Press-in mounting type
- Thread direction: counterclockwise (left)
- Dust boot material: rubber
- Ball joint assembly included
- Mounting hardware included
- Power steering application
- Threaded, tapered stud design
Detailed Description
Delphi TC4257 is engineered for the front upper suspension location and built to match OE-style fit and function for the Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer. Delphi applies dimensional and material analysis to help ensure proper compatibility between the original part and the aftermarket replacement, while the ball joint is tested across extreme temperature ranges and salt-spray exposure to support durability in demanding road conditions. The design includes a plastic bearing type, rubber dust boot, and pre-greased construction for straightforward replacement service.
This part cross-references MOOG Chassis Products K500014 and Mevotech Supreme MK500014 for the same application.
What It Helps Address
- Front-end looseness from a worn upper ball joint
- Clunking or popping noises from suspension movement
- Uneven steering response caused by joint wear
- Excess play in the front upper suspension connection
- Inspection failures related to suspension joint condition
Installation Notes and Tips
TC4257 uses a press-in mounting design, so proper suspension service tools are required for removal and installation. Confirm the counterclockwise left thread direction, tapered stud dimensions, and front upper position before installation. Always verify vehicle application by year, make, model, and suspension configuration before service.
Quality Assurance
Delphi uses OE-based engineering and validation methods for its steering and suspension portfolio. This ball joint is evaluated for temperature extremes and corrosion exposure to support consistent performance in everyday driving and harsh-weather conditions.
- Fits 2006-2010 Ford Explorer, Front Upper
- Fits 2007-2010 Ford Explorer Sport Trac, Front Upper
- Fits 2006-2010 Mercury Mountaineer, Front Upper
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2010 | Ford | Explorer | Front Upper | — |
| 2010 | Ford | Explorer Sport Trac | Front Upper | — |
| 2010 | Mercury | Mountaineer | Front Upper | — |
| 2009 | Ford | Explorer | Front Upper | — |
| 2009 | Ford | Explorer Sport Trac | Front Upper | — |
| 2009 | Mercury | Mountaineer | Front Upper | — |
| 2008 | Ford | Explorer | Front Upper | — |
| 2008 | Ford | Explorer Sport Trac | Front Upper | — |
| 2008 | Mercury | Mountaineer | Front Upper | — |
| 2007 | Ford | Explorer | Front Upper | — |
| 2007 | Ford | Explorer Sport Trac | Front Upper | — |
| 2007 | Mercury | Mountaineer | Front Upper | — |
| 2006 | Ford | Explorer | Front Upper | — |
| 2006 | Mercury | Mountaineer | Front Upper | — |
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