OEM Axle Shaft for 2020-2025 Buick & Chevrolet • Encore GX, Trailblazer - Rear, Right (Passenger)

Before you buy a replacement rear axle shaft, here's what to consider:

• Check the Side: This axle shaft is for the right (passenger) side. Make sure you need the right side and not the left.
• Inspect the Splines: Look closely at the splines (the grooves that connect to the differential). Make sure they are in good condition and not worn or damaged.
• Check for Straightness: The axle shaft should be straight and not bent. A bent axle shaft will cause vibrations and other problems.
• Look for Cracks or Damage: Carefully inspect the entire axle shaft for any cracks, dents, or other signs of damage.

Quality indicators to look for:

• Material: High-quality steel is important for strength and durability.
• Manufacturing Process: Look for axle shafts that are precision-machined and heat-treated.
• Surface Finish: A smooth surface finish helps to reduce friction and wear.
• Warranty: A good warranty indicates that the manufacturer stands behind their product.

What's usually included with the part?

• The axle shaft itself.
• Sometimes, a new axle seal may be included. Check the product description.
• Usually, you'll need to reuse your existing wheel hub and bearings.

Replacing a rear axle shaft can range from moderate to difficult, depending on your experience.

• Difficulty Level: Intermediate
• Estimated Time: 2-4 hours

Special tools you might need:

• Jack and jack stands
• Wheel chocks
• Socket set
• Wrench set
• Torque wrench
• Slide hammer (for removing the old axle shaft)
• Axle seal installer (optional, but recommended)
• Gear oil

Critical steps and tips:

1. Safety First: Always use jack stands to support the vehicle. Never work under a vehicle supported only by a jack.
2. Disconnect the Brake Line: Be very careful when disconnecting the brake line. Avoid damaging it.
3. Remove the Wheel Hub: You may need a special tool to remove the wheel hub from the axle shaft.
4. Install the New Seal: If you're replacing the axle seal, use an axle seal installer to avoid damaging it.
5. Torque to Spec: Use a torque wrench to tighten all bolts to the manufacturer's specifications.
6. Refill Gear Oil: Make sure to refill the differential with the correct type and amount of gear oil.

DIY or Professional Installation?

• If you're comfortable working on cars and have the necessary tools, you can probably do it yourself.
• However, if you're not experienced or don't have the tools, it's best to have a professional install it. Improper installation can lead to serious problems.

Let's look at the different options for buying a rear axle shaft:

• Used OEM: These are original parts taken from vehicles. They are tested to make sure they are working properly. This is often the most affordable option.
• Refurbished OEM: These are original parts that have been repaired and restored to like-new condition. They often include new components.
• New Aftermarket: These are brand new parts made by companies other than the original manufacturer. They are designed to meet the original specifications.

All three options can be good choices, depending on your budget and needs.

When replacing a rear axle shaft, consider these related parts:

• Axle Seals: These seals prevent gear oil from leaking out. It's a good idea to replace them when you replace the axle shaft.
• Wheel Bearings: Worn wheel bearings can cause noise and vibration. If they are worn, replace them at the same time.
• Differential Fluid: Old or contaminated differential fluid can damage the axle shaft and other components. Change the fluid when you replace the axle shaft.

Replacing these parts at the same time can prevent repeat failures and save you time and money in the long run.

A rear axle shaft can last a long time, but its lifespan depends on several factors.

• Normal Lifespan: 75,000 - 150,000 miles or more.

Factors that affect longevity:

• Driving Habits: Aggressive driving, such as hard acceleration and braking, can shorten the lifespan.
• Maintenance: Regular maintenance, such as changing the differential fluid, can extend the lifespan.
• Road Conditions: Driving on rough roads or in areas with potholes can damage the axle shaft.
• Load: Regularly carrying heavy loads can put extra stress on the axle shaft.
• Corrosion: Exposure to salt and other corrosive elements can weaken the axle shaft.

Here's a general idea of what you can expect to pay for a rear axle shaft and installation:

• Used OEM: $50 - $150
• Refurbished OEM: $100 - $250
• New Aftermarket: $150 - $300

Labor costs can vary depending on the shop and your location. Expect to pay:

• Labor: $200 - $400

Total job cost estimates:

• Used OEM: $250 - $550
• Refurbished OEM: $300 - $650
• New Aftermarket: $350 - $700

The Buick Encore GX and Chevy Trailblazer are generally reliable vehicles, but there are a few things to keep in mind regarding the rear axle:

• Rear Differential Issues: Some owners have reported issues with the rear differential, which can affect the axle shafts.
• Proper Lubrication: It's important to use the correct type of gear oil in the rear differential to prevent damage to the axle shafts.
• Regular Inspections: Have the rear axle and differential inspected regularly for any signs of wear or damage.

Check for any Technical Service Bulletins (TSBs) related to the rear axle on these vehicles. A TSB is a notice from the manufacturer about a known problem and how to fix it.

After installing the new rear axle shaft, it's important to verify that it's working correctly.

• Test Drive: Take the vehicle for a test drive and listen for any unusual noises.
• Check for Vibrations: Pay attention to any vibrations, especially at higher speeds.
• Inspect for Leaks: Check for any gear oil leaks around the axle shaft and wheel area.
• Listen for Clicking: Make some tight turns and listen for clicking sounds.

If you notice any problems, take the vehicle back to the mechanic for further inspection.

Q: How do I know if my rear axle shaft is bent?
A: A bent axle shaft will usually cause vibrations, especially at higher speeds. You may also notice a wobble in the rear wheel.

Q: Can I drive with a bad rear axle shaft?
A: It's not recommended. A bad rear axle shaft can be dangerous and can cause further damage to your vehicle.

Q: How often should I change my differential fluid?
A: Check your owner's manual for the recommended interval. Generally, it's every 30,000 to 60,000 miles.

Q: What kind of gear oil do I need for my Buick Encore GX or Chevy Trailblazer?
A: Consult your owner's manual or a trusted mechanic for the correct type of gear oil. Using the wrong type can damage the differential.

Q: Is it okay to buy a used axle shaft?
A: Yes, a used OEM axle shaft can be a good option, especially if you're on a budget. Just make sure it's been inspected and tested to ensure it's in good working condition.

OEM Part Numbers:

• GM: 42481416, 60005021, 60006453, 60008637, 60009519

Fits Years: 2020 2021 2022 2023 2024 2025