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Installing a limited-slip differential (LSD) on your AE86 can significantly enhance its cornering capabilities, providing better traction and control during spirited drives or competitive racing. This DIY guide will walk you through the necessary steps to install an LSD, ensuring you get the most out of your vehicle’s performance.
What is a Limited-Slip Differential?
A limited-slip differential is a type of differential that allows for some degree of wheel slip while still transferring power to both wheels. This feature is particularly beneficial in performance driving, where maintaining grip during turns is crucial. Unlike an open differential, which can cause one wheel to spin freely, an LSD helps to distribute power more evenly between the wheels, improving cornering stability.
Tools and Materials Needed
- Socket set
- Torque wrench
- Jack and jack stands
- Limited-slip differential kit
- Gear oil
- Sealant
- Shop manual for AE86
Preparation
Before starting the installation, ensure that you have all necessary tools and materials at hand. It’s also advisable to work in a well-ventilated area, preferably on a flat surface. Begin by lifting the rear of the car using a jack and secure it with jack stands to ensure safety during the process.
Step-by-Step Installation Process
1. Remove the Rear Wheels
Start by removing the rear wheels to gain access to the differential. Use a socket set to loosen the lug nuts and take off the wheels. Set them aside in a safe location.
2. Drain the Differential Fluid
Locate the differential drain plug and use a socket to remove it. Allow the old fluid to drain completely into a suitable container. This step is essential to prevent contamination during the installation of the new LSD.
3. Remove the Differential Cover
Next, remove the bolts securing the differential cover. Carefully pry the cover off, taking care not to damage the mating surface. Clean the surface thoroughly to prepare for the new LSD installation.
4. Take Out the Old Differential
Once the cover is off, you can access the old differential. Remove the retaining bolts and carefully pull the differential out of the housing. Make sure to keep track of any shims or spacers that may be present.
5. Install the New Limited-Slip Differential
Now it’s time to install the new limited-slip differential. Carefully place it into the housing, ensuring that it sits properly. Reinstall any shims or spacers that were removed earlier. Secure the differential with the retaining bolts, tightening them to the manufacturer’s specifications using a torque wrench.
6. Reattach the Differential Cover
Apply a suitable sealant to the mating surface of the differential cover and carefully position it back onto the differential. Reinstall the bolts and tighten them evenly to ensure a proper seal.
7. Fill with New Differential Fluid
Locate the fill plug on the differential and remove it. Using a funnel, pour the new gear oil into the differential until it reaches the appropriate level. Replace the fill plug once done.
8. Reinstall the Rear Wheels
With the installation complete, it’s time to put the rear wheels back on. Align the wheels with the hub and hand-tighten the lug nuts. Once all wheels are back in place, lower the car and use a torque wrench to tighten the lug nuts to the specified torque.
Testing Your New Limited-Slip Differential
After completing the installation, it’s crucial to test the vehicle to ensure the LSD is functioning correctly. Start by driving at low speeds in a safe area. Gradually increase speed and make turns to feel the difference in traction and cornering ability.
Conclusion
Installing a limited-slip differential on your AE86 can greatly enhance its performance, particularly in cornering situations. By following this DIY guide, you can successfully complete the installation and enjoy the improved handling characteristics of your vehicle. Always remember to adhere to safety practices while working on your car and consult a professional if you encounter any difficulties.