Chrysler Imperial Universal Joint Replacement Guide (1975-1984)
Addressing the clunks, vibrations, and shudders common to a failing U-joint in your Imperial.
- Your Imperial likely has a two-piece driveshaft with three U-joints and a center bearing; inspect all components.
- A clunk when shifting or a vibration at speed are the most common signs of a bad U-joint.
- Ignoring symptoms can lead to a dangerous and damaging driveshaft separation.
- For reliability, choose a premium brand like Spicer and replace all U-joints at the same time.
Is Your Imperial Clunking or Vibrating? It Could Be the U-Joints.
A worn-out universal joint is a common problem on older, rear-wheel-drive cars like your Chrysler Imperial. Because this part is under constant stress, it naturally wears out over decades of use. The most frequent cause of failure is the loss of grease from the bearing caps, which allows moisture and dirt to enter, destroying the small needle bearings inside. Ignoring the symptoms can be dangerous, as a complete failure can cause the driveshaft to detach from the vehicle.
Symptoms of a Bad Universal Joint
- Loud Clunking Noise: The most common sign is a distinct "clunk" or "bang" when you shift the transmission into Drive or Reverse. This is caused by excessive play in the worn-out joint.
- Vibrations While Driving: You may feel a vibration throughout the car that gets worse as you increase speed. This is often mistaken for an unbalanced tire, but if a tire balance doesn't fix it, the U-joints are a likely suspect.
- Squeaking or Chirping: A rhythmic squeak that matches your speed (but not tire rotation speed) often points to a U-joint that has run out of lubrication.
- Visible Rust or Grease: If you look under the car at the driveshaft, you might see rust-colored dust or fresh grease slung around the U-joint caps. This is a clear sign the seals have failed.
Warning: Do Not Ignore a Failing U-Joint
A complete U-joint failure will cause the driveshaft to disconnect, leading to a loss of power. The loose driveshaft can then cause severe damage to your transmission, exhaust, and the underbody of your car as it spins and hits things. This is a critical safety issue.
Choosing the Right Aftermarket U-Joint
Original OEM U-joints for a 1975-1984 Imperial are essentially unavailable. Fortunately, the aftermarket offers a range of quality options. For a classic car, investing in a good quality part is wise to ensure reliability and a smooth ride.
| Brand Tier | Brands | Quality & Notes |
|---|---|---|
| Premium / Heavy-Duty | Dana Spicer, Yukon Gear | Spicer is widely considered the original equipment manufacturer for many classic cars and is known for its durability and strength. Their non-greaseable joints are often preferred for maximum strength. Yukon Gear specializes in heavy-duty drivetrain parts and is also an excellent, robust choice. |
| Quality Aftermarket | Moog, SKF | Moog is a well-known brand that often features grease fittings (zerks) for periodic maintenance. SKF is a top-tier bearing manufacturer, and their U-joints are also a high-quality, reliable option. |
| Standard / Economy | GMB | GMB provides a reliable and affordable option for a standard replacement. It meets original specifications and is a good choice for stock, daily-driven vehicles. |
Pro Tip: Greaseable vs. Non-Greaseable
Non-greaseable (sealed) U-joints, like many from Spicer, are forged from solid steel and are considered stronger. Greaseable joints have channels drilled through them for grease to flow, which technically makes them slightly weaker but allows you to extend their life with regular maintenance. For a stock Imperial, either type is suitable, but a high-quality sealed joint offers a strong, maintenance-free solution.
Frequently Asked Questions
How many U-joints does my 1975-1984 Imperial have?
Most Imperials of this generation use a two-piece driveshaft, which has a total of three U-joints and a center support bearing. It's crucial to inspect all three joints and the center bearing when you suspect a problem.
Should I replace all the U-joints at once?
Yes. If one U-joint has failed due to age and mileage, the others are likely not far behind. Replacing all of them at the same time is highly recommended to ensure reliability and save on future labor costs.
Were there any recalls for the Imperial's U-joints?
No, there have been no recalls issued by the NHTSA for universal joints or the driveshaft on the 1975-1984 Chrysler Imperial.
What is a center support bearing?
On vehicles with a two-piece driveshaft, the center support bearing is a rubber-mounted bearing that holds the two halves of the shaft in place. If this bearing fails, it can also cause vibrations. It should be inspected and likely replaced at the same time as the U-joints.
Technical Specifications
The 1975-1984 Chrysler Imperial typically uses a two-piece driveshaft assembly with three universal joints and one center support bearing. U-joint sizes can vary, so measuring your existing joints (cap diameter and width) before ordering is recommended. Common Chrysler joints of the era include the 7260 and 7290 series, but verification is necessary.
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.