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The C3 Corvette, produced from 1968 to 1982, is a beloved classic known for its sleek design and performance. Many enthusiasts seek ways to enhance its power and efficiency. One effective modification is the installation of a 3.73 rear gear and a 700R4 transmission. This article will guide you through the benefits and steps of this upgrade.
Understanding the Components
Before diving into the installation process, it’s essential to understand the components involved:
- 3.73 Rear Gear: This gear ratio improves acceleration and responsiveness.
- 700R4 Transmission: A four-speed automatic transmission that enhances performance and fuel efficiency.
Benefits of Upgrading to a 3.73 Rear Gear
Upgrading to a 3.73 rear gear offers several advantages:
- Improved Acceleration: The lower gear ratio allows for quicker starts and better throttle response.
- Enhanced Performance: This gear ratio is ideal for those who enjoy spirited driving and track days.
- Better Torque Delivery: The 3.73 ratio helps in delivering torque more efficiently to the wheels.
Benefits of Installing a 700R4 Transmission
The 700R4 transmission is a popular choice for C3 Corvette upgrades due to its numerous benefits:
- Overdrive Gear: The fourth gear allows for lower RPMs at highway speeds, improving fuel efficiency.
- Improved Shifting: The 700R4 features smoother shifts, enhancing the overall driving experience.
- Increased Durability: Designed to handle higher power outputs, making it suitable for performance applications.
Preparation for Installation
Before starting the installation, gather the necessary tools and parts:
- Tools Needed:
- Jack and jack stands
- Socket set
- Wrenches
- Torque wrench
- Transmission jack
- Parts Required:
- 3.73 rear gear set
- 700R4 transmission
- New transmission mount
- Fluid for the transmission and rear end
- Gasket and sealant
Installation Steps
Follow these steps to successfully install the 3.73 rear gear and 700R4 transmission:
- Step 1: Lift the Vehicle: Use a jack to lift the Corvette and secure it with jack stands.
- Step 2: Remove the Old Transmission: Disconnect the driveshaft, unbolt the transmission, and carefully lower it.
- Step 3: Install the New 700R4 Transmission: Position the new transmission using the transmission jack and secure it in place.
- Step 4: Connect the Driveshaft: Reattach the driveshaft to the new transmission.
- Step 5: Remove the Rear Differential Cover: Drain the fluid and take off the cover to access the gears.
- Step 6: Replace the Rear Gear: Remove the old gear and install the 3.73 gear set, ensuring proper alignment.
- Step 7: Reassemble the Differential: Reattach the differential cover and refill with new fluid.
- Step 8: Lower the Vehicle: Carefully remove the jack stands and lower the Corvette.
- Step 9: Test Drive: Take the car for a test drive to ensure everything is functioning correctly.
Final Considerations
After the installation, monitor the performance of your C3 Corvette. Pay attention to any unusual sounds or behaviors, and ensure the fluid levels are adequate. Regular maintenance will help keep your upgraded components in top condition.
Conclusion
Upgrading to a 3.73 rear gear and a 700R4 transmission can significantly enhance the performance of your C3 Corvette. With improved acceleration, better fuel efficiency, and a smoother driving experience, this modification is a worthwhile investment for any Corvette enthusiast.