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The BMW E39 M5 is renowned for its performance and handling. One way to enhance these attributes is by installing a 3.38 limited-slip differential (LSD). This modification can significantly improve traction, especially during aggressive driving and cornering. In this guide, we’ll explore the steps and benefits of installing a 3.38 LSD on your E39 M5.
Understanding the Benefits of a 3.38 LSD
A limited-slip differential allows for better power distribution to the wheels, improving traction and stability. The 3.38 ratio strikes a balance between acceleration and top speed, making it an ideal choice for enthusiasts. Here are some benefits:
- Improved Traction: Enhanced grip during acceleration and cornering.
- Better Handling: More predictable behavior in tight turns.
- Increased Performance: Optimized power delivery to the wheels.
Tools and Materials Needed
Before starting the installation, ensure you have the following tools and materials:
- Socket set
- Torque wrench
- Jack and jack stands
- 3.38 LSD unit
- Differential oil
- Sealant
- Safety goggles and gloves
Step-by-Step Installation Process
1. Prepare Your Workspace
Ensure you have a clean and safe workspace. Park your E39 M5 on a level surface and engage the parking brake. Gather all your tools and materials before starting.
2. Lift the Vehicle
Using a jack, lift the rear of the vehicle and secure it with jack stands. Make sure the vehicle is stable before proceeding.
3. Remove the Rear Differential
Begin by removing the driveshaft. Unbolt it from the differential and slide it out. Next, detach the differential by removing the mounting bolts. Carefully lower the differential from the vehicle.
4. Install the 3.38 LSD
Once the old differential is removed, place the 3.38 LSD into position. Align it with the mounting points and secure it with the bolts. Make sure to torque the bolts to the manufacturer’s specifications.
5. Reattach the Driveshaft
Reconnect the driveshaft to the new differential. Ensure that all bolts are tightened properly to avoid any issues during operation.
6. Fill with Differential Oil
Fill the differential with the appropriate type and amount of oil. Consult your owner’s manual for specifications. Ensure the fill plug is securely closed after filling.
7. Lower the Vehicle
Carefully remove the jack stands and lower the vehicle back to the ground. Double-check all connections and bolts before taking the car for a test drive.
Testing and Adjustments
After installation, it’s important to test the vehicle. Take it for a drive in a safe area to evaluate the performance of the new LSD. Pay attention to how the car handles during acceleration and cornering.
Common Issues and Troubleshooting
During or after installation, you might encounter some common issues:
- Noise: If you hear unusual noises, check the installation for loose bolts.
- Oil Leaks: Inspect for leaks around the seals and fill plug.
- Handling Issues: If handling feels off, reassess the alignment and differential settings.
Conclusion
Installing a 3.38 LSD on your E39 M5 can greatly enhance traction and overall performance. With the right tools and careful installation, you can enjoy improved handling and driving dynamics. Always remember to test the vehicle after installation and make any necessary adjustments for optimal performance.