Ford Bronco II Locking Hub Guide (1984-1990)
Everything you need to know about replacing the locking hubs on your 1984-1990 Ford Bronco II.
- Replacing factory automatic hubs with aftermarket manual hubs is a highly recommended reliability upgrade for the Bronco II.
- Failure to engage 4WD and grinding noises from the front wheels are the most common symptoms of a bad locking hub.
- Aftermarket brands like Mile Marker and Dorman offer durable, all-metal options that are superior to the original parts.
- When replacing hubs, it's best to do them in pairs to ensure even performance and reliability.
Is it time to replace your Bronco II's locking hubs?
The locking hubs on your 1984-1990 Ford Bronco II are essential for the 4WD system to work. Over time, these parts can wear out or fail, especially the original automatic hubs which were known to have issues. Many owners choose to replace them with more reliable manual hubs. If your 4x4 isn't engaging or you hear strange noises from the front wheels, your locking hubs could be the problem.
Symptoms of Failing Locking Hubs
- 4WD Fails to Engage: The most common symptom is when you shift into 4-wheel drive, but the front wheels don't receive power. 🎬 Check out this walkthrough for fixing 4x4 engagement with manual hubs. This often happens when you need it most.
- Grinding or Clicking Noises: You might hear grinding, clicking, or whirring sounds from the front wheel area, especially when shifting into or out of 4WD. This can indicate that the hub is only partially engaging or has internal damage.
- Difficulty Turning the Hub Dial: For manual hubs, if the dial is very hard to turn or feels loose and doesn't click into place, the hub is likely failing.
- Vehicle Pulls to One Side: If one hub engages and the other doesn't, you might feel the vehicle pull as power is sent unevenly to the front wheels.
Choosing Your Aftermarket Replacement
For a vehicle like the 1984-1990 Bronco II, finding new OEM (Original Equipment Manufacturer) parts is nearly impossible. Aftermarket parts are the go-to solution. The factory automatic hubs were convenient but are a known weak point and prone to failure. Most owners agree that converting to a quality set of aftermarket manual hubs is a significant upgrade in reliability. Manual hubs are simpler, stronger, and give you positive confirmation that your 4WD is engaged.
Aftermarket Brand Tiers
| Brand | Typical Quality & Price | Best For |
|---|---|---|
| Mile Marker | Good / Mid-Range | A popular and reliable choice for daily driving and moderate off-road use. Often made with all-metal construction, they are 🎬 Watch this Mile Marker manual hub conversion on an '88 Bronco II. considered a durable upgrade over factory hubs. |
| Dorman | Good / Mid-Range | A well-known aftermarket brand that produces direct-fit replacement parts. Dorman hubs are a solid option for restoring original function. |
| Replacement | Standard / Economy | These are often the most budget-friendly option. They are designed to meet basic fit and function requirements, suitable for drivers who need a functional repair at a lower cost. |
Frequently Asked Questions
Should I replace my automatic hubs with manual hubs?
Yes, this is highly recommended. Factory automatic hubs on the Bronco II are a common failure point. Aftermarket manual hubs are more durable, reliable, and give you direct control over engagement, ensuring your 4WD works when you need it. Many owners consider this a necessary upgrade.
Do I need a special tool to replace my locking hubs?
You will likely need snap ring pliers and possibly a specific hub nut socket, depending on what's currently on your vehicle. If you are converting from the original automatic hubs to manual hubs, you may also need a spindle nut conversion kit.
🎬 See how to install manual hubs on an auto hub setup.Can I replace just one locking hub?
While you can replace just the one that failed, it is highly recommended to replace them in pairs. This ensures even wear and predictable 4WD performance. Since they are sold in pairs and are relatively inexpensive, replacing both at the same time is the best practice.
Were there any recalls for Bronco II locking hubs?
No specific recalls were found for the locking hubs on the 1984-1990 Ford Bronco II. Searches on the NHTSA database did not show any recalls related to this component for this vehicle range.
Helpful Videos
Technical Specifications
Fitment for Dana 28 (most common) or Dana 35 TTB front axle. Hubs are typically 5-bolt with a 23-spline count.
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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.
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