The ABS tone ring, also called the reluctor ring or ABS counter, is a critical component of your Ford E250's anti-lock braking system. When it fails, your ABS light may come on, and the system may not function properly. Finding the correct part number for your specific model year is essential for a successful replacement. This guide covers everything you need to know about the rear ABS tone ring part number for the Ford E250, including common numbers by year, identification tips, and where to buy.
Understanding the ABS Counter (Tone Ring) for Ford E250 Rear Suspension
What is a Tone Ring?
The tone ring is a toothed wheel that rotates with the axle or wheel hub. The ABS sensor reads the teeth to determine wheel speed. On the Ford E250, the rear tone ring is typically pressed onto the axle shaft inside the differential or on the wheel hub. The "counter" refers to the number of teeth on the ring; the E250 usually uses a 50-tooth or 60-tooth ring depending on the year and axle type.
Signs of a Faulty Rear ABS Tone Ring
Common symptoms include an illuminated ABS light, erratic ABS activation, or no ABS function. You may also hear a grating noise from the rear differential if the ring is cracked or loose. If the tone ring is damaged, the ABS sensor cannot read wheel speed correctly, triggering a diagnostic trouble code (DTC) such as C1100 or C1234.
Ford E250 Rear ABS Tone Ring Part Numbers by Year
The part number varies by model year and rear axle type (semi-floating or full-floating). Below are common OEM part numbers for the rear tone ring. Always verify with your VIN.
1997-2003 Ford E250 Rear Tone Ring Part Number
- Part number: F75Z-2C270-AA (50-tooth ring for semi-floating axle)
- Alternate: F75Z-2C270-BA (for some 2003 models)
- Note: These are for 8.8-inch rear axles. If your E250 has a Dana 60 axle, use part number F75Z-2C270-AB.
2004-2007 Ford E250 Rear Tone Ring Part Number
- Part number: 4C3Z-2C270-AA (60-tooth ring for 9.75-inch rear axle)
- Alternate: 4C3Z-2C270-BA (for some 2004-2005 models)
- Tip: Check the number of teeth on your old ring; 60-tooth is most common for these years.
2008-2014 Ford E250 Rear Tone Ring Part Number
- Part number: 8C3Z-2C270-A (60-tooth ring for both semi- and full-floating axles)
- Note: Some 2012-2014 models use a magnetic encoder ring integrated into the wheel bearing assembly. In that case, the tone ring is not a separate serviceable part; you must replace the entire hub/bearing.
How to Identify the Correct Part Number for Your E250
Check Your Vehicle's VIN and Build Date
Ford's parts catalog uses the VIN to determine the exact components. Your VIN's 10th digit indicates the model year. Contact a Ford dealership parts department with your VIN; they can provide the correct part number and often the price. Alternatively, use an online Ford parts catalog (like FordParts.com) to look up by VIN.
Inspect the Existing Tone Ring
If you have access to the old tone ring, look for stamped part numbers or count the teeth. The number of teeth is crucial: 50 or 60. Also note the inner diameter and thickness. Take clear photos of the ring and the axle flange where it mounts. This helps cross-reference with aftermarket options.
Use Ford Parts Diagrams
Online parts diagrams (not from marketplaces) can help you locate the correct part. Search for "Ford E250 rear axle parts diagram" and find the tone ring in the differential section. The diagram will list the OEM part number. Be sure to select the correct axle code from your vehicle's door sticker.
Where to Buy the Rear ABS Tone Ring for Ford E250
OEM Ford Dealerships
Buying from a Ford dealer guarantees the correct fit. Part numbers listed above are OEM. Prices range from $20 to $50. Call your local dealer's parts counter and provide your VIN. They can often have the part next day.
Reputable Aftermarket Suppliers
Brands like Dorman, ACDelco, or WVE offer aftermarket tone rings. For example, Dorman part 904-509 fits many Ford vans. Aftermarket rings are typically cheaper ($10-$30) but may not have the same durability. Ensure the tooth count and dimensions match OEM. Check reviews on automotive forums for fitment. Avoid generic unbranded parts.
Installation Considerations
Tools Needed
- Jack and jack stands
- Axle nut socket (typically 36mm)
- Torque wrench
- Brake cleaner and new lubricant
- Possibly a press to remove and install the ring
Professional vs DIY
Replacing a tone ring requires removing the axle shaft and pressing off the old ring and on the new one. If you lack a press or experience, take the job to a mechanic. The cost is usually an hour of labor ($100-$150) plus parts. DIY can save money but requires careful handling to avoid damaging the new ring or sensor.
Final Recommendation
To order the correct rear ABS tone ring for your Ford E250, use your VIN to look up the part from a Ford dealer. The most common part numbers are F75Z-2C270-AA for 1997-2003 models, 4C3Z-2C270-AA for 2004-2007, and 8C3Z-2C270-A for 2008-2014. If you are replacing the ring yourself, match the tooth count and dimensions exactly. If you are uncertain, have a professional mechanic confirm the part number before ordering.