Ford Aerostar Universal Joint Replacement Guide (1986-1997)
Clunks and vibrations in your Aerostar could mean a bad U-joint; here's how to choose the right replacement.
- Symptoms of a bad U-joint include clunking when shifting, squeaking at low speeds, and vibrations at highway speeds.
- It is highly recommended to replace all U-joints on a driveshaft at the same time, even if only one is showing symptoms.
- Dana/Spicer is considered the top-tier brand for this part, while SKF and GMB are reliable standard replacements.
- Confirm if your Aerostar is RWD or AWD to know how many U-joints you need, and measure the old parts before ordering to ensure a perfect fit.
Is Your Aerostar's U-Joint Failing?
A U-joint is a wear-and-tear item. After years of use, the grease inside can dry up or get contaminated, and the small needle bearings inside the caps wear out. This wear causes looseness in the driveline, leading to noises and vibrations you can feel while driving. Ignoring a bad U-joint is dangerous, as a complete failure can cause the driveshaft to separate from the vehicle, leading to a loss of control or major damage.
Choosing the Right Aftermarket U-Joint
For a vehicle like the 1986-1997 Aerostar, aftermarket U-joints offer excellent quality, often meeting or exceeding original specifications. The main choice you'll make is between top-tier, heavy-duty brands and reliable, standard-replacement options. You will also need to decide between greasable and non-greasable joints.
Pro Tip: Greasable vs. Non-Greasable U-Joints
Non-Greasable (Sealed): These are often considered stronger because the internal cross is solid steel. They are filled with grease at the factory and require no maintenance. Many high-quality OEM and aftermarket joints (like Spicer) are non-greasable. They are a great "fit and forget" option.
Greasable: These have a small fitting (a zerk) that allows you to add fresh grease periodically. This can flush out contaminants and extend the life of the joint if done regularly (e.g., at every oil change). However, the channel drilled for the grease can create a slight weak point compared to a solid-body joint.
Aftermarket Brand Tiers for Your Aerostar
- Top Tier (OEM Quality or Better): Dana Spicer Chassis is widely considered the benchmark for U-joints and was likely the original equipment for your Aerostar. They are known for being strong and durable. If you want the best, most reliable part, choose Spicer. Yukon Gear is a high-performance brand built for heavy-duty use, which is also an excellent, though possibly more expensive, choice.
- Trusted Aftermarket: Moog has a long history, but recent forum discussions show mixed reviews on their U-joint quality, with some users experiencing issues. SKF and GMB are generally seen as reliable, standard replacement brands that offer good value for a daily-driven Aerostar.
Common Ordering Mistake: Ford sometimes used U-joints with two different bearing cap sizes on the same joint (often called a "big cap" joint). It is a good idea to remove and measure your old U-joints with calipers before ordering to ensure you get an exact match.
Estimated Costs for Ford Aerostar U-Joint Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket U-Joint | $18.53 - $107.89 (per joint) |
| Shop Labor | $150 - $350 |
| Total Professional Replacement | $200 - $450+ |
Frequently Asked Questions
How many U-joints does my Ford Aerostar have?
A standard rear-wheel drive (RWD) Aerostar has two U-joints on its rear driveshaft. All-wheel drive (AWD) models have an additional driveshaft for the front wheels, which also has U-joints. Some driveshafts may also feature a double-cardan joint, which contains two U-joints close together, so it's important to inspect your specific vehicle.
If one U-joint is bad, should I replace all of them?
Yes, it is highly recommended. The U-joints on a driveshaft wear at a similar rate. When one fails, it puts extra stress on the others, meaning they are likely not far from failing too. Replacing them all at once saves you from doing the same job again in the near future.
Can I replace a U-joint myself?
Yes, if you have the right tools and some mechanical experience. The job requires safely lifting the vehicle, removing the driveshaft, and using a large bench vise or a special U-joint/ball joint press to force the old joints out and press the new ones in. It can be difficult to remove old, rusted joints.
Were there any recalls for Aerostar U-joints?
No, searches of the National Highway Traffic Safety Administration (NHTSA) database and other records did not find any recalls or specific Technical Service Bulletins (TSBs) for universal joints on the 1986-1997 Ford Aerostar.
Technical Specifications
OEM Part Numbers: E3TZ-4635-B F1TZ-4635-C
Varies by RWD/AWD configuration and specific driveshaft. RWD models typically use two U-joints on the rear driveshaft. AWD models use additional joints. Measurement of old parts is recommended.
We Have This Part in Stock
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 Aerostar: