Mitsubishi Eclipse Clutch Slave Cylinder Guide (2000-2006)
Is your clutch pedal acting strange? Here’s what 3G Eclipse owners need to know about a failing clutch slave cylinder.
- Symptoms like a spongy pedal or difficulty shifting are the most common indicators of failure.
- This is a DIY-friendly repair for the 2000-2006 Eclipse as the cylinder is external.
- It is strongly recommended to replace the clutch master cylinder at the same time as the slave cylinder.
- Brands like Exedy, Sachs, and LuK offer OEM-quality replacements for a fraction of the dealer price.
Is Your Clutch Pedal Spongy or Stuck to the Floor?
A failing clutch slave cylinder is a common problem on manual transmission cars as they age. For the 2000-2006 Mitsubishi Eclipse, this part can wear out, causing shifting problems that can leave you stranded. Understanding the symptoms and knowing which replacement part to choose is essential for getting your Eclipse back on the road.
Symptoms of a Bad Clutch Slave Cylinder
Watch for these common signs of failure. If you experience one or more, you should inspect your clutch system soon.
- Spongy or Soft Clutch Pedal: The pedal feels mushy and doesn't have its normal resistance. This is often the first sign that air has entered the hydraulic system through a failing seal.
- Difficulty Shifting Gears: You might find it hard to get into gear, especially from a stop. Grinding when trying to select first or reverse is a classic symptom. This happens because the slave cylinder isn't pushing far enough to fully disengage the clutch.
- Clutch Pedal Stays on the Floor: After you press it, the pedal doesn't come back up. This indicates a major loss of hydraulic pressure.
- Visible Fluid Leaks: You may see brake fluid (which is used as clutch fluid) on the ground below the transmission area. The slave cylinder is located on the front of the transmission housing; check it for wetness or dark stains.
- Low or Dirty Clutch Fluid: The clutch shares fluid with the brake master cylinder reservoir on many cars, but on the Eclipse, it has its own small reservoir. If the fluid is low, you likely have a leak. If it's dark or black, the seals inside the cylinder are breaking down and contaminating the fluid.
Pro Tip: Check the Master Cylinder Too
The clutch slave cylinder works with the clutch master cylinder. They often wear out around the same time. If you find yourself replacing the slave cylinder, it is highly recommended to replace the master cylinder as well to prevent having to do a similar job twice. Bleeding the system with fresh DOT 3 brake fluid is required after replacement.
Choosing the Right Aftermarket Slave Cylinder
You don't need to buy an expensive OEM part from a dealership. Several reputable aftermarket brands offer quality replacements. Here’s a breakdown of common choices.
Tier 1: OE Quality & Performance Brands
These brands are known for making original equipment for many car manufacturers or have a strong reputation for high-quality engineering. They are excellent choices for a reliable, long-lasting repair.
- Exedy: Often an OEM supplier for Japanese vehicles, Exedy parts are trusted for their fit and durability. Many consider them a direct, high-quality replacement for the original part.
- Sachs: A well-respected German brand that is also an OEM supplier for many European cars. They are known for quality hydraulics and clutch components.
- LuK: Another top-tier OEM supplier known for excellent clutch and hydraulic components.
Tier 2: Reliable Aftermarket Brands
These brands provide a good balance of quality and price. They are a solid choice for daily drivers.
- Beck Arnley: This brand sources parts from various manufacturers, often from the same ones that supply the original parts. They focus on matching the OE form, fit, and function.
- PERFECTION: A long-standing name in the aftermarket clutch industry, offering dependable replacement parts.
Tier 3: Economy Brands
These brands offer the most budget-friendly options. While functional, they may not have the same long-term durability or material quality as higher-tiered brands.
- Dorman: Dorman produces a wide range of aftermarket parts and is known for creating solutions to common failures. Their parts are widely available and offer a functional, budget-conscious repair.
Cost of Replacing a Clutch Slave Cylinder
The cost can vary based on your location and whether you do the work yourself. The slave cylinder on the 2000-2006 Eclipse is externally mounted, making it a straightforward job for a DIYer with the right tools.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $17 - $56 |
| New OEM Part | $95 - $145 |
| Shop Labor | $75 - $140 |
| Total Professional Repair | $92 - $200+ |
Common Ordering Mistake
The 2000-2006 Eclipse was available with a 2.4L 4-cylinder engine or a 3.0L V6 engine. While some parts are interchangeable, the clutch slave cylinders often have different part numbers. Always verify the part fits your specific engine before ordering. The V6 OEM part number is MD748617, and the 4-cylinder is MR470217.
Frequently Asked Questions
Can I drive with a bad clutch slave cylinder?
It is not recommended. A failing slave cylinder can make shifting gears difficult or impossible. If the cylinder fails completely, you will lose all clutch control and be unable to disengage the clutch, leaving you stranded.
Is replacing the slave cylinder hard to do myself?
For the 3G Eclipse, the slave cylinder is mounted on the outside of the transmission with two bolts, making it accessible. The main challenges are properly bleeding the air out of the hydraulic line after installation and potentially dealing with a rusted flare nut on the fluid line. It is a manageable DIY job for someone with basic tools and experience.
What tools do I need to replace it?
You will need a basic socket set, a flare nut wrench (to avoid stripping the fluid line fitting), a container to catch fluid, and a friend to help you bleed the system. A vacuum bleeder or pressure bleeder can make the job easier.
Do I need to get a new clutch if I replace the slave cylinder?
Not necessarily. The slave cylinder is part of the hydraulic system that operates the clutch. If your clutch itself is not slipping and is in good condition, you only need to replace the hydraulic components. However, if a mechanic has the transmission out for any reason, it's wise to replace the clutch, pressure plate, and slave cylinder at the same time.
Technical Specifications
OEM Part Numbers: MR470217 (2.4L 4-Cylinder) MD748617 (3.0L V6)
The clutch slave cylinder for the 2000-2006 Mitsubishi Eclipse is an external slave cylinder that uses DOT 3 brake fluid for its hydraulic operation. It is typically made of cast iron.
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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.
- Mitsubishi Eclipse:
- 🛍️ Shop This Part
- Is Your Clutch Pedal Spongy or Stuck to the Floor?
- Symptoms of a Bad Clutch Slave Cylinder
- Pro Tip: Check the Master Cylinder Too
- Choosing the Right Aftermarket Slave Cylinder
- Cost of Replacing a Clutch Slave Cylinder
- Common Ordering Mistake
- Frequently Asked Questions
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