Subaru Forester CV Axle Shaft Guide: 1998-2002 Models
Diagnosing and choosing the right replacement CV axle for your first-generation Forester.
- A clicking noise when turning is the most common symptom of a bad outer CV joint.
- Be cautious with aftermarket axles; many are known to cause vibrations in Subarus that OEM axles do not.
- The front axles on these models are secured with a roll pin that must be punched out for removal.
- Regularly inspecting the rubber boots for tears can help you save a good OEM axle before it fails from grease loss.
Is My Forester's CV Axle Failing?
The CV axles on the first-generation Forester are common wear items. Failure usually begins when the protective rubber boot tears. This allows the special grease inside the joint to escape while letting in dirt and water, which quickly ruins the joint. Here are the main symptoms to watch for:
- Clicking or Popping When Turning: This is the most common sign of a failing outer CV joint. The noise is most obvious during sharp, low-speed turns, like in a parking lot.
- Vibration When Accelerating: A shudder or vibration that you feel through the car when you accelerate can point to a worn inner CV joint. This symptom is particularly important when diagnosing aftermarket axle issues.
- Visible Grease: If you see dark, heavy grease splattered on the inside of your wheel, on the brake components, or in the wheel well, it's a sure sign of a torn CV boot.
Choosing the Right Aftermarket Axle: A Warning for Forester Owners
When it comes to CV axles on Subarus, the choice between OEM and aftermarket is a serious topic. Subaru's AWD system is sensitive to the balance and design of the axles.
The Aftermarket Vibration Problem
Many 1998-2002 Forester owners report experiencing vibrations immediately after installing new, non-OEM CV axles. This is often due to slight differences in balance and internal construction compared to the original parts. While a cheap aftermarket axle might save money upfront, it can lead to a frustrating vibration that is difficult to diagnose. Some owners replace axles multiple times before realizing the part itself is the issue.
OEM Axles: Original Subaru axles are widely considered the best option for fitment and vibration-free performance. However, for a 1998-2002 model, new OEM axles can be extremely expensive or may no longer be available. A remanufactured OEM axle or a good used one can be a reliable alternative.
Aftermarket Axles: Aftermarket axles, like those from Surtrak, offer a significant cost saving. While some have no issues, the risk of vibration is real. If you choose an aftermarket axle, be aware of this possibility. Some premium aftermarket brands claim better quality control, but owner experiences vary. If a new aftermarket axle causes a vibration that wasn't there before, the axle is the most likely cause.
Cost of Replacing a CV Axle Shaft (1998-2002 Forester)
| Part / Service | Estimated Cost |
|---|---|
| New Aftermarket Axle (e.g., Surtrak) | $85.95 - $218.90 |
| New OEM Axle | $400 - $550+ (if available) |
| Shop Labor (per side) | $150 - $300 |
| Total Professional Replacement (Aftermarket Part) | $235 - $520 |
Note: Costs are estimates and will vary based on your location, the specific part chosen, and your mechanic's labor rates.
Frequently Asked Questions
Why is the front axle on my Forester held in with a pin?
The front CV axles on many 1998-2002 Foresters use a roll pin (or spring pin) to secure the inner joint to the transmission's stub shaft. This pin must be driven out with a punch to remove the axle and a new one installed with the new axle. Later models use a simpler snap-ring design. It is a critical step in the replacement process for these specific model years.
Can I just replace the torn boot?
Yes, if you catch a torn boot very early before the joint starts making noise, you can replace just the boot and repack it with grease. This is a messy job and requires removing the axle, but it allows you to keep your high-quality OEM axle if it's still in good condition. If the joint is already clicking, it's too late and the entire axle should be replaced.
Is the left axle the same as the right? Is the front the same as the rear?
No. Front, rear, left, and right axles are often different lengths and have different part numbers. It is crucial to order the correct axle for the specific position on your vehicle. Additionally, axles can differ between manual and automatic transmission models. Always verify the part fits your exact vehicle configuration.
Do I need an alignment after replacing a CV axle?
It is highly recommended. The replacement process often involves separating suspension components like the ball joint or strut bolts. Getting a wheel alignment afterward ensures your tire angles are correct, preventing uneven tire wear and ensuring proper handling.
Technical Specifications
The front axles on 1998-2002 models are typically secured to the transmission stub shafts with a roll pin. The axle nut size is 32mm. Axle shafts are specific to location (front/rear, left/right) and transmission type (automatic/manual).
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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.
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