Hey guys! So, you're diving into the world of the 2G Turbo Eclipse AWD transmission, huh? Awesome choice! This is a seriously robust piece of engineering, but like any high-performance component, it needs the right care and knowledge to keep it running strong. Let's break down everything you need to know about these transmissions, from the basics to some pro tips.

Understanding the 2G Turbo Eclipse AWD Transmission

When we talk about the 2G Turbo Eclipse AWD transmission, we're generally referring to the Mitsubishi Eclipse produced in the second generation (1995-1999) that came equipped with a turbocharged engine and all-wheel-drive system. These models are particularly popular among car enthusiasts due to their performance capabilities and tuning potential. The transmission in these cars is designed to handle a significant amount of power, but its longevity and performance depend heavily on proper maintenance and understanding its characteristics.

What Makes It Special?

The 2G Eclipse AWD transmission stands out because it's built to handle the extra stress from both the turbocharger and the all-wheel-drive system. Unlike front-wheel-drive transmissions, the AWD version distributes power to all four wheels, providing superior traction and handling, especially in challenging conditions. This makes it a favorite for those looking to build a reliable and fast street or track car. However, this also means there are more components that can wear out or fail if not properly cared for. The design includes robust gears, a strong case, and a sophisticated transfer case to manage the power split between the front and rear axles. These transmissions are not just about brute strength; they also incorporate features that enhance the driving experience, such as smooth shifting and responsive feedback.

Key Components

To really get to grips with this transmission, it's essential to know its main parts:

• Gearbox: This is where the magic happens with different gear ratios to optimize power and speed.
• Transfer Case: Splits the power between the front and rear axles, crucial for the AWD system.
• Differentials: Allow wheels to spin at different speeds, vital for cornering.
• Clutch (for manual transmissions): Connects and disconnects the engine from the transmission.
• Torque Converter (for automatic transmissions): Acts as a fluid coupling to transfer engine power.

Understanding how these components work together can help you diagnose issues and perform maintenance more effectively. For example, a worn-out clutch can cause slipping and poor acceleration, while a failing transfer case can lead to uneven power distribution and unusual noises. Knowing the symptoms of these issues can save you time and money in the long run. Also, remember that each component has its own service intervals and specific maintenance needs. Regular inspections and timely replacements of worn parts are key to keeping your transmission in top condition.

Identifying Your Transmission Type

Before you start any work, make sure you know exactly what transmission you have. 2G Eclipse AWDs came with both manual and automatic options. The manual transmissions are generally considered stronger and more desirable for performance builds, but the automatics can also be built to handle significant power. Check your car's VIN or look for a transmission code on the transmission case to confirm the exact model. This is crucial because parts and service procedures can vary significantly between different types.

Common Issues and How to Spot Them

Alright, let's talk about the trouble spots. Knowing what to look for can save you a ton of headaches down the road. The 2G Turbo Eclipse AWD transmission is generally tough, but it's not invincible.

Grinding Gears

If you're hearing a grinding noise when shifting gears, especially between specific gears, it's a red flag. This often indicates worn synchronizers. Synchronizers are responsible for matching the speed of the gears before they engage, and when they wear out, they can't do their job properly. Ignoring this issue can lead to further damage to the gears themselves, requiring a more extensive and expensive repair. Sometimes, simply changing the transmission fluid can alleviate the problem, but more often than not, a rebuild is necessary to replace the worn synchronizers.

Slipping Gears

Slipping gears—where the transmission pops out of gear or hesitates—is another common problem. This can be caused by worn gears, damaged shift forks, or low transmission fluid. In automatic transmissions, slipping can also be a sign of worn clutch packs or a malfunctioning torque converter. Addressing this issue promptly is crucial because it can quickly lead to complete transmission failure. Regular fluid checks and changes can help prevent this, but if the problem persists, it's best to consult with a transmission specialist.

Noises

Unusual noises like whining, clunking, or humming can indicate various problems within the transmission. Whining noises often point to worn bearings, while clunking can be a sign of loose or broken components. Humming might indicate issues with the differential or transfer case. Pay attention to when the noises occur—whether it's during acceleration, deceleration, or while idling—as this can help pinpoint the source of the problem. Don't ignore these noises, as they're usually a sign of an underlying issue that needs attention.

Difficulty Shifting

If you're finding it hard to shift gears, especially into certain gears, it could be due to a number of issues. Problems with the shift linkage, a worn clutch (in manual transmissions), or internal transmission damage can all cause shifting difficulties. In some cases, adjusting the shift linkage or replacing the clutch cable can resolve the issue. However, if the problem lies within the transmission itself, a rebuild may be necessary. Ignoring hard shifting can lead to further damage and eventually make the car undrivable.

Fluid Leaks

Transmission fluid leaks are a common issue and should be addressed promptly. Leaks can occur from various seals and gaskets, and low fluid levels can lead to overheating and transmission damage. Regularly check for puddles under your car and inspect the transmission case for any signs of leakage. The color of the fluid can also provide clues about the condition of the transmission. Clean, red fluid is a good sign, while dark or burnt-smelling fluid indicates that it's time for a change. Addressing leaks early can prevent more serious problems and extend the life of your transmission.

Maintenance Tips for Longevity

Okay, so how do we keep these transmissions happy and healthy? Regular maintenance is key to extending the life of your 2G Turbo Eclipse AWD transmission.

Regular Fluid Changes

This is the single most important thing you can do. Use a high-quality synthetic transmission fluid that meets or exceeds the manufacturer's specifications. For manual transmissions, changing the fluid every 30,000 to 60,000 miles is a good rule of thumb. For automatics, aim for every 25,000 to 50,000 miles, or more frequently if you're doing a lot of hard driving or track days. Always check your car's service manual for the recommended intervals and fluid types.

Inspect Seals and Gaskets

Regularly inspect the transmission seals and gaskets for leaks. Catching a leak early can prevent major problems down the road. Replace any worn or damaged seals to maintain proper fluid levels and prevent contamination. Pay special attention to the areas around the input and output shafts, as these are common locations for leaks.

Check and Adjust Shift Linkage

For manual transmissions, make sure the shift linkage is properly adjusted. A misaligned linkage can cause difficulty shifting and accelerate wear on the synchronizers. Consult your car's service manual for the correct adjustment procedure. If you're not comfortable doing it yourself, a professional mechanic can easily handle this task.

Monitor Transmission Temperature

If you're doing a lot of performance driving, consider installing a transmission temperature gauge. Excessive heat is a major killer of transmissions, so monitoring the temperature can help you avoid damage. If you notice the temperature rising too high, take it easy and let the transmission cool down. Adding an external transmission cooler can also help keep temperatures in check.

Avoid Hard Launches and Abusive Driving

While the 2G Eclipse AWD is a performance car, it's not indestructible. Avoid hard launches, excessive wheelspin, and other abusive driving habits that can put undue stress on the transmission. Smooth, controlled driving will help extend the life of your transmission and other drivetrain components.

Upgrades and Modifications

For those looking to push the limits, there are plenty of upgrades available for the 2G Turbo Eclipse AWD transmission.

Performance Clutches

If you have a manual transmission and you're increasing the engine's power output, a performance clutch is a must. A stronger clutch can handle the extra torque and prevent slipping, ensuring that all that power gets to the wheels. There are many different types of performance clutches available, so choose one that's appropriate for your power level and driving style.

Upgraded Gears

For serious performance builds, consider upgrading the gears in the transmission. Stronger gears can withstand higher power levels and more aggressive driving. Look for gears made from high-quality materials like billet steel for maximum strength and durability. Gear upgrades can significantly improve the reliability and performance of your transmission.

Limited Slip Differentials (LSDs)

Installing an LSD can greatly improve traction and handling, especially in high-performance applications. An LSD helps distribute power more evenly between the wheels, reducing wheelspin and improving acceleration. There are different types of LSDs available, so research which one is best suited for your needs.

Transmission Coolers

As mentioned earlier, keeping the transmission cool is crucial for longevity. Adding an external transmission cooler can significantly lower operating temperatures, especially in high-performance or towing applications. Choose a cooler that's appropriately sized for your vehicle and driving conditions. A transmission cooler is a relatively inexpensive upgrade that can provide significant benefits.

Valve Body Upgrades (for automatics)

For automatic transmissions, upgrading the valve body can improve shift performance and responsiveness. A modified valve body can provide firmer, quicker shifts, enhancing the overall driving experience. This is a popular upgrade for those looking to get the most out of their automatic transmission.

Conclusion

The 2G Turbo Eclipse AWD transmission is a robust and capable unit, but it requires proper care and maintenance to ensure its longevity and performance. By understanding its components, recognizing common issues, and following a regular maintenance schedule, you can keep your transmission running strong for years to come. And for those looking to push the limits, there are plenty of upgrades available to enhance its performance and durability. Happy driving, and stay turbo'd!