Universal Joint Replacement Guide for the 1987-1991 GMC R3500
Keep your heavy-duty GMC on the road by understanding, identifying, and replacing worn universal joints.
- A clunking noise when shifting or a vibration at speed are serious symptoms that should not be ignored.
- For maximum reliability on a heavy-duty truck, choose a premium non-greaseable U-joint from a brand like Dana/Spicer.
- Complete U-joint failure can cause the driveshaft to detach, leading to a loss of control and expensive damage.
- Always measure your old U-joints or verify part numbers before ordering, as several sizes were used on these trucks.
Is Your R3500's U-Joint Failing?
A failing U-joint is more than just an annoyance; it's a serious safety risk. If a U-joint breaks completely, the driveshaft can separate from the truck, leading to a loss of control and significant damage. Listen to your truck—it will give you warning signs before a complete failure.
Key Warning Signs:
- Clunking Noises: A loud "clunk" or "bang" when you shift from park into drive or reverse is a classic sign of excessive play in the U-joint.
- Vibrations at Speed: If you feel a vibration throughout the truck that gets worse at highway speeds, it could be a U-joint that has thrown the driveshaft out of balance. This is often confused for a tire issue, but if balancing the wheels doesn't fix it, the U-joints are a likely suspect.
- Squeaking or Clicking: A rhythmic squeaking noise that starts when you begin to move and changes with speed often points to a dry U-joint that has lost its grease.
- Visible Rust or Leaks: Look under your truck at the driveshaft. If you see rust-colored dust or grease splattered around the U-joint caps, it's a clear sign the seals have failed and the joint is wearing out.
Warning: Do Not Ignore These Symptoms
Driving with a bad U-joint is dangerous. A complete failure can cause the driveshaft to drop, potentially digging into the pavement and causing you to lose control, or damaging other underbody components. At the first sign of trouble, get your truck inspected.
Choosing the Right Aftermarket U-Joint
For a vehicle from this era, aftermarket parts are the most common and accessible option. Original equipment (OEM) parts may be difficult to find. Fortunately, several aftermarket brands offer quality that meets or exceeds original specifications. The main choice you'll face is between premium, heavy-duty brands and standard replacements, as well as greaseable vs. non-greaseable designs.
Brand Tiers for Your R3500:
- Premium (OEM Quality or Better): Dana/Spicer is often the original equipment manufacturer for many trucks and is widely considered the gold standard for durability and strength. Moog is also a well-known brand, though some users report their quality can be inconsistent depending on the product line and where it was made. SKF is another trusted brand known for quality bearings and driveline components.
- Mid-Grade/Standard: GMB is a Japanese manufacturer known for producing good quality, reliable U-joints that often meet OEM specifications. They use strong materials like chrome-molybdenum steel.
- Performance/Heavy-Duty: Yukon Gear & Axle is known for high-strength drivetrain components, particularly for off-road and racing applications. Their U-joints are built for extreme durability and can be a great choice if you frequently tow heavy loads or use your truck in demanding conditions.
Pro-Tip: Greaseable vs. Non-Greaseable U-Joints
You'll find both greaseable (with a zerk fitting for adding grease) and non-greaseable (sealed) U-joints. Non-greaseable joints, like many from Spicer, are often stronger because the cross is solid steel. However, greaseable joints can have a longer life if you are diligent about regular maintenance (greasing them with every oil change). For a heavy-duty truck like the R3500, a high-quality non-greaseable joint from a brand like Spicer is often the most reliable, install-and-forget option.
What to Expect for Replacement Costs
The cost to replace U-joints can vary based on the parts you choose and whether you do the work yourself. Your R3500 has at least two U-joints on the main driveshaft, and potentially more if it's a long-wheelbase model with a two-piece driveshaft.
| Part/Service | Estimated Cost |
|---|---|
| Aftermarket U-Joint (per joint) | $20 - $75 |
| Shop Labor (per driveshaft) | $150 - $350 |
| Total Professional Replacement (2 joints) | $200 - $450+ |
Frequently Asked Questions
How many U-joints does my 1987-1991 R3500 have?
A standard configuration has two U-joints on the rear driveshaft—one at the transmission end and one at the differential. Long-wheelbase models may have a two-piece driveshaft with a center support bearing and three or four U-joints in total. It is best to inspect your specific truck to confirm.
Can I replace a U-joint myself?
Yes, this is a DIY-feasible job if you have the right tools and some mechanical experience. You will need a way to safely lift the vehicle, basic hand tools, and either a bench vise with large sockets or a dedicated U-joint press to remove 🎬 Learn how to replace U-joints using common household tools. the old joint and install the new one. Some original GM U-joints were installed with injected plastic retainers that must be melted out with a torch 🎬 Watch this guide for replacing U-joints without any special equipment. before pressing.
Do I need to get my driveshaft balanced after replacing the U-joints?
If the replacement is done carefully without damaging or bending the yokes on the driveshaft, balancing is not usually required. However, if you had significant vibrations before the repair or if the vibration continues after, having the driveshaft professionally balanced is a good idea.
What are the most common U-joint sizes for this truck?
One-ton trucks like the R3500 typically use heavy-duty U-joints like the 1350 or 1410 series. However, various combinations were used over the years. It is critical to measure your existing U-joint caps and width or find the correct part number to ensure you order the right replacement.
Helpful Videos
Technical Specifications
Common U-joint series for this application include 1350 and 1410 series. Measurement of the existing U-joint (cap diameter and overall width) is the most reliable way to ensure the correct replacement part is ordered.
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.
- GMC R3500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your R3500's U-Joint Failing?
- Key Warning Signs:
- Warning: Do Not Ignore These Symptoms
- Choosing the Right Aftermarket U-Joint
- Brand Tiers for Your R3500:
- Pro-Tip: Greaseable vs. Non-Greaseable U-Joints
- What to Expect for Replacement Costs
- Frequently Asked Questions
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