Choosing the Right Universal Joint for Your 1981-1983 Plymouth PB150
Don't let a bad U-joint leave your classic Plymouth van stranded—here's what you need to know.
- Symptoms like clunking, vibrations, and squeaking should be addressed immediately to avoid a dangerous driveshaft failure.
- For maximum durability, especially if you haul heavy loads, Dana Spicer is the highest quality choice.
- Moog offers a reliable, good-quality alternative, often with the benefit of being greaseable for extended life.
- It is always best practice to replace both driveshaft U-joints at the same time.
Is Your PB150's U-Joint Failing?
A 40-year-old work van has seen a lot of miles, and its U-joints have been under constant stress. Because failure can be catastrophic, it's important to recognize the warning signs. Ignoring these symptoms can lead to more expensive repairs or a dangerous breakdown.
- Clunking Noise When Shifting: A loud "clunk" or "bang" when you shift from park into drive or reverse is the most common sign. This sound is caused by excessive slack in a worn-out U-joint.
- Vibration While Driving: A vibration that you can feel throughout the van, which gets worse at higher speeds, points to a failing U-joint. This happens because the worn part has thrown the driveshaft out of balance.
- Squeaking or Chirping: A rhythmic squeaking noise that matches the rotation of the driveshaft (often faster than your wheels) usually means the U-joint has lost its grease and is grinding itself down.
- Visible Rust or Leaks: If you look under the van, you might see rust-colored dust around the U-joint caps. This is a sign that the needle bearings inside are failing.
Choosing the Right Aftermarket U-Joint
For a vehicle like the 1981-1983 PB150, new original equipment (OEM) parts from Mopar are generally no longer available. Aftermarket parts are your only realistic option. The good news is that several reputable brands offer quality replacements. Your choice depends on your budget and how you use your van.
Brand Quality Tiers
Top Tier: Dana Spicer
Dana is the original manufacturer for many vehicle components, and their Spicer brand U-joints are widely considered the best you can get. They are known for their durability and are often seen as an upgrade over the original parts. If you use your PB150 for heavy hauling or want the longest-lasting part, Spicer is the top choice. One parts catalog lists Spicer part number 5-789X for the 1981-83 PB150.
Reliable Aftermarket: Moog
Moog is a well-respected aftermarket brand known for quality and often for improving on original designs. Many Moog U-joints are "greaseable," meaning they have a zerk fitting that allows you to add fresh grease, which can extend their life if maintained properly. While some users have noted concerns about shifting manufacturing locations, Moog remains a very popular and reliable choice for most repairs.
Economy Tier: GMB
GMB is a budget-friendly brand. While some users report that their U-joints fit and work without issue, others have experienced problems with quality and roughness right out of the box. If your budget is the primary concern, GMB is an option, but be aware that the quality may not match that of Spicer or Moog.
Aftermarket U-Joint Cost
| Part | Price Range |
|---|---|
| New Aftermarket U-Joint | $17.14 - $57.10 |
| Shop Labor for Replacement (1-2 joints) | $120 - $250 |
Frequently Asked Questions
How many U-joints does my PB150 have?
Most standard wheelbase PB150 vans have a one-piece driveshaft with two U-joints: one at the transmission and one at the rear axle. Some long-wheelbase models may have a two-piece driveshaft with three U-joints and a center support bearing.
Should I get a greaseable or a sealed U-joint?
Greaseable U-joints, like many offered by Moog, can last longer if you regularly add fresh grease. Sealed U-joints, like many from Spicer, are maintenance-free but must be replaced when they wear out. For a classic vehicle that may not be a daily driver, a high-quality sealed joint is often the simpler, more reliable choice.
Can I replace just the one bad U-joint?
Yes, but it is highly recommended to replace them in pairs. If the rear U-joint has failed, the front one has been subjected to the same age and stress and is likely not far behind. Replacing both at the same time saves you from having to do the job again soon.
Is replacing a U-joint a DIY job?
For a mechanically inclined person, yes. It requires basic hand tools, a heavy hammer, and sockets, or a bench vise or ball joint press. However, it can be a difficult and frustrating job if the old parts are rusted in place. If you are not comfortable working under your vehicle or using significant force on parts, it is best left to a professional mechanic.
Technical Specifications
The 1981-1983 Plymouth PB150 is a Dodge B-series van, which uses externally-clipped U-joints. A common replacement part number from a top-tier brand is Spicer 5-789X. Always confirm the exact fitment with the parts supplier before purchasing.
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.
- Plymouth PB150: