2019-2023 Ford Transit Connect Rear Hub Failure: Diagnosing Noise & Replacement Guide
This definitive guide covers the common symptoms, part numbers, and replacement costs for the rear wheel hub assembly on the 2019-2023 Ford Transit Connect.
- The most common symptom of failure is a humming or grinding noise from the rear that gets louder with speed and may change when turning.
- The four hub mounting bolts are single-use, torque-to-yield fasteners and MUST be replaced with new ones during installation for safety.
- The correct torque specifications for the hub bolts and axle nut are critical and must be obtained from an official Ford service manual.
- This guide covers the REAR hub assembly (Part No. KV6Z-1109-A / HUB-414); the front hub is a different part.
Symptoms of a Failing Rear Hub
A failing rear wheel hub on a Ford Transit Connect typically gives clear audible warnings. Because these are sealed units, you won't find leaking fluid. Instead, listen for these sounds and pay attention to how the vehicle feels.
1. Humming, Grinding, or Roaring Noise
The most common symptom is a noise coming from the rear of the vehicle that changes with speed. It often starts as a faint hum and progresses to a louder grinding, roaring, or rumbling sound as the bearing wears out. This noise is present whether you are accelerating, braking, or coasting, and its pitch and volume will increase as you drive faster.
2. Noise Changes While Turning
A good way to diagnose a bad wheel bearing is to notice how the sound changes when you turn. When turning, the vehicle's weight shifts, putting more load on the outside wheel. For example, if you are turning left and the noise gets louder, it often points to a failing bearing on the right side of the vehicle. If the noise gets quieter when turning, the failing bearing is likely on the inside wheel of the turn.
3. ABS or Traction Control Warning Light
The rear hub assembly contains the ABS wheel speed sensor. If this sensor fails or the magnetic ring it reads from inside the hub is damaged, it will trigger the ABS and/or traction control warning lights on your dashboard. This indicates that these safety systems are disabled.
4. Vibration or Looseness
In advanced stages of failure, you might feel a vibration through the floor or seat of the van. You may also notice a feeling of looseness in the rear of the vehicle, or a tendency for the van to pull to one side. To check for this, you can safely jack up the rear of the vehicle and try to wiggle the tire from side-to-side and top-to-bottom. Any noticeable play or movement indicates a severely worn bearing.
Pro Tip: Wheel bearing noise can sometimes be confused with tire noise, especially from tires with uneven wear. However, tire noise typically doesn't change when turning, while bearing noise often does.
Known Issues, TSBs, and Recalls
As of mid-2024, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from Ford for premature failure of the rear wheel hubs on the 2019-2023 Transit Connect. While recalls exist for other components on these vehicles, such as shifter cable bushings and PCM software, the hub assemblies have not been identified as a recall-level safety defect. Failure is generally considered a result of normal wear and tear.
Buying a Used Rear Hub: What to Look For
A low-mileage used OEM hub can be a reliable and cost-effective alternative to a new part. Since these are sealed units, the most important factor is the mileage of the donor vehicle. Sealed bearings can often last 100,000 miles or more, so aim for a part from a vehicle with well under 80,000 miles.
When inspecting a used hub, check for the following:
- Spin the Hub: Hold the hub and spin it by hand. It should rotate smoothly and silently. If you feel any roughness, grinding, or catching, the bearing is bad.
- Check for Play: Try to wiggle the inner and outer parts of the hub against each other. There should be absolutely no play or looseness.
- Inspect the ABS Sensor: Check that the ABS sensor connector is intact, with no broken plastic or bent pins. The wiring leading to it should not be cut or damaged.
- Look for Damage: Inspect the metal housing for any cracks, heavy corrosion, or signs of impact damage. Check that the wheel studs are straight and the threads are in good condition.
Choosing a used OEM hub over a cheap, new aftermarket part often provides better long-term reliability. The quality of the bearing steel and the precision of the integrated ABS sensor in an original Ford or Motorcraft part are typically superior to budget-level aftermarket options.
Replacement Guide and Special Procedures
Replacing the rear hub assembly on a 2019-2023 Transit Connect is a bolt-on procedure, making it feasible for an experienced DIY mechanic. The difficulty is moderate, primarily due to the need for correct torque specs and dealing with potentially rusted bolts.
Safety Warning: The four bolts that secure the hub assembly to the vehicle and the main axle nut are typically single-use, torque-to-yield fasteners. They are designed to stretch when tightened and MUST be replaced with new bolts for a safe installation. Reusing these bolts can lead to them loosening or breaking, which could cause the wheel to detach from the vehicle.
Key Torque Specifications
Proper torque is critical for the safety and function of the wheel hub. An over-tightened axle nut can destroy a new bearing quickly, while loose bolts can lead to catastrophic failure.
| Component | Torque Specification | Notes |
|---|---|---|
| Wheel Lug Nuts | 111 ft-lbs (150 Nm) | Tighten in a star pattern. |
| Brake Caliper Bracket Bolts | 81 ft-lbs | For the two bolts holding the caliper bracket to the knuckle. |
| Hub Assembly Mounting Bolts | Consult Official Manual | CRITICAL: These are single-use bolts. The exact torque spec from the Ford workshop manual is required. |
| Rear Axle Nut | Consult Official Manual | CRITICAL: This nut sets the bearing preload. The exact torque spec and procedure from the Ford workshop manual is required. |
Note: Extensive research did not yield a publicly available, reliable source for the hub mounting bolt or axle nut torque specifications for this specific vehicle. These values are essential for a safe repair. It is strongly recommended to obtain these specifications from the official Ford service manual or consult a professional technician.
Related Parts
When replacing a rear hub, it's wise to replace the following parts at the same time:
- Hub Mounting Bolts: As mentioned, these are single-use and must be replaced.
- Axle Nut: This is also often a single-use part and should be replaced with a new one.
- Brake Rotor and Pads: Since you will be removing the brake components to access the hub, it is the perfect time to inspect and, if necessary, replace the rear brake pads and rotors.
Cost Comparison
The cost to replace a rear hub assembly can vary significantly based on the parts you choose and whether you do the work yourself.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Ford/Motorcraft) | $155 - $264 |
| New Aftermarket | $55 - $115 |
| Used OEM (Low Mileage) | $50 - $120 |
| Shop Labor | $106 - $155 per side |
Frequently Asked Questions (FAQ)
Is the front hub the same as the rear hub?
No, the front and rear hub assemblies are different parts with different part numbers. The primary OEM part number for the rear hub is KV6Z-1109-A (Motorcraft HUB-414). The front hub has a different design to accommodate the steering knuckle and driveshaft.
Can I replace just the bearing instead of the whole hub assembly?
No. On the 2019-2023 Transit Connect, the rear wheel bearing is part of a sealed, integrated hub assembly. It is not designed to be pressed out or serviced separately. The entire unit must be replaced.
Do I need a wheel alignment after replacing a rear hub?
Generally, a wheel alignment is not required after replacing only the rear hub assembly, as it does not typically affect the vehicle's alignment angles. However, if other suspension components were loosened or replaced during the job, an alignment is recommended.
Why is it so important to replace the hub bolts?
The hub bolts are torque-to-yield (TTY) fasteners. This means they are designed to be tightened to a specific torque and then stretched a certain amount to achieve their final clamping force. This stretching permanently deforms the bolt, so it cannot provide the correct clamping force if reused. Reusing them creates a serious risk of the bolts failing and the wheel assembly coming loose.
Technical Specifications
OEM Part Numbers: KV6C-2C299-A1A KV6C-2C299-A1B KV6C-2C299-A1C KV6Z-1109-A KV6Z1109A HUB-414 HUB414
Position: Rear Left or Right. Includes: Integrated sealed bearing and ABS sensor. Bolt Pattern: 5 Lug. Flange Bolt Holes: 4.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford Transit Connect:
- Symptoms of a Failing Rear Hub
- 1. Humming, Grinding, or Roaring Noise
- 2. Noise Changes While Turning
- 3. ABS or Traction Control Warning Light
- 4. Vibration or Looseness
- Known Issues, TSBs, and Recalls
- Buying a Used Rear Hub: What to Look For
- Replacement Guide and Special Procedures
- Key Torque Specifications
- Related Parts
- Cost Comparison
- Frequently Asked Questions (FAQ)
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