Benefits of Converting from Automatic to Manual Transmission in the Infiniti G35
Converting from automatic to manual transmission in the Infiniti G35 enhances driving engagement, improves fuel efficiency, and provides better control over vehicle performance, making it a rewarding upgrade.
1.1. Enhanced Driving Experience
Converting the Infiniti G35 to a manual transmission significantly enhances the driving experience by offering greater driver engagement. Manual shifting allows for better control over gear changes, creating a more immersive and rewarding connection to the vehicle. The tactile feedback of the clutch and shifter makes every drive feel more dynamic and enjoyable. This upgrade transforms the G35 into a car that feels more responsive and connected to the driver’s inputs.
1.2. Improved Fuel Efficiency
Converting the Infiniti G35 from automatic to manual transmission can lead to improved fuel efficiency. Manual transmissions typically reduce fuel consumption by eliminating the parasitic losses associated with torque converters. Drivers can optimize gear shifts for better MPG, especially in city driving. This swap not only enhances performance but also lowers fuel costs, making it a practical upgrade for those seeking to maximize efficiency without compromising on driving enjoyment.
1.3. Increased Control Over Vehicle Performance
Switching to a manual transmission in the Infiniti G35 grants drivers more direct control over acceleration and deceleration. With a clutch pedal and manual gear shifts, the driver can precisely manage torque delivery and engine speed. This allows for better modulation of power, especially during cornering or braking, enhancing overall vehicle responsiveness. The ability to control gears manually also improves traction and stability, making the driving experience more dynamic and engaging compared to an automatic setup.
Essential Parts and Tools Required for the Swap
A clutch kit, flywheel, and manual transmission are necessary. Additional components include a clutch pedal assembly, hydraulic system, and specialized tools for precise installation and alignment.
2.1. Clutch Kit and Flywheel
A high-quality clutch kit and flywheel are essential for the swap. The FX Stage 2 HD clutch kit and ProLite flywheel are popular choices, offering improved grip and durability. These components ensure smooth engagement and disengagement of the clutch, critical for manual transmission functionality. They are designed to fit the Infiniti G35 and Nissan 350Z, providing reliable performance and longevity. Proper installation of these parts is vital for optimal operation.
2.2. Manual Transmission and Related Components
The manual transmission is a critical component of the swap, often sourced from compatible models like the 370Z or 350Z. A six-speed transmission, such as the T56, is commonly used for its durability and smooth shifting. Ensure the transmission is inspected and tested before installation. Related components include the clutch fork, slave cylinder, and gear linkage, all of which must be compatible with the G35’s engine and chassis for proper fitment.
2.3. Clutch Pedal Assembly and Hydraulic System
The clutch pedal assembly and hydraulic system are essential for smooth manual transmission operation. A hydraulic conversion kit, including a clutch pedal, master cylinder, and slave cylinder, must be installed. Hydraulic lines must be routed and connected properly to ensure consistent clutch engagement. Compatibility with the G35’s existing systems is crucial for reliable performance.
2.4. Transmission Cross-Member Modification
Modifying the transmission cross-member is necessary for accommodating the manual transmission. If using the automatic transmission cross-member, it must be cut and reinforced to fit the manual transmission properly. This ensures structural integrity and proper alignment of the transmission. The modification is critical for a seamless swap and to prevent potential issues with transmission mounting and stability.
2.5. Specialized Tools for the Procedure
Specialized tools are essential for a successful manual transmission swap. A transmission jack is necessary for safe handling and installation. A socket set, including metric sizes, is required for bolts and connections. A clutch alignment tool ensures proper clutch installation. Additionally, a hydraulic bleeding kit is needed for the clutch system. Proper tools are crucial to avoid damage and ensure a precise, professional-grade installation.
Technical Considerations and Preparations
Converting from automatic to manual requires ECU reprogramming for compatibility. Wiring modifications for the clutch safety switch and pedal configuration are essential. Proper hydraulic system installation ensures smooth operation.
3.1. ECU Reprogramming for Manual Transmission Compatibility
Reprogramming the ECU is crucial for manual transmission compatibility. The automatic transmission ECU must be reflashed to recognize manual inputs. Custom tuning ensures proper engine and transmission synchronization. This step resolves compatibility issues and ensures smooth operation. Improper reprogramming can lead to reduced performance or engine issues. Specialized software and tools are required, making it essential to consult a qualified technician or tuner for accurate configuration.
3.2. Wiring Modifications for Clutch Safety Switch
Wiring modifications are necessary to integrate the clutch safety switch, ensuring the vehicle starts only when the clutch is pressed. This involves installing a clutch switch harness and connecting it to the ECU. Proper wiring ensures safety and prevents accidental starts. The process may require custom wiring or adapters, depending on the transmission and vehicle model. Professional installation is recommended to avoid electrical issues.
3.3. Brake and Clutch Pedal Configuration
Configuring the brake and clutch pedals ensures proper functionality and driver comfort. The clutch pedal assembly, including the master cylinder and hydraulic line, must be installed and aligned correctly. The brake pedal may require modification to accommodate the new clutch pedal. Proper adjustment ensures smooth operation and prevents interference. This step is critical for safe and precise control of the vehicle during driving. Professional installation is highly recommended.
3.4. Hydraulic Line and Slave Cylinder Installation
Installing the hydraulic line and slave cylinder is crucial for proper clutch operation. The hydraulic line must be routed correctly to avoid damage and interference. The slave cylinder is mounted on the transmission, ensuring precise actuation of the clutch. Air must be bled from the system to eliminate bubbles and ensure smooth engagement. Proper installation requires attention to detail and precise alignment to maintain consistent clutch performance.
Installation Process and Tips
The process involves precise alignment of components, ensuring secure connections, and thorough testing. Tips include checking transmission alignment, verifying hydraulic system integrity, and testing clutch engagement;
4.1. Transmission Removal and Preparation
Transmission removal requires disconnecting electrical connectors and hydraulic lines, then lifting the unit out carefully. Prepare the area by cleaning and inspecting for damage. Modify the cross-member if necessary to accommodate the manual transmission. Ensure the engine is supported and components like the driveshaft are secured. Proper alignment and preparation are critical for a smooth swap. Reference a repair manual for precise steps.
4.2. Flywheel and Clutch Installation
Install the flywheel, ensuring it is properly aligned and secured to the crankshaft. Inspect for damage or wear and clean the surface. Mount the clutch kit, including the pressure plate and disc, aligning it with the flywheel. Tighten the bolts gradually in a star pattern to avoid warping. Install the pilot bearing and ensure all components are seated correctly. Follow manufacturer instructions for torque specifications.
4.3. Manual Transmission Installation and Alignment
Carefully lift the manual transmission and align it with the engine’s bellhousing, ensuring proper fitment. Secure the transmission using the provided bolts, tightening gradually in a star pattern. Verify the transmission is properly seated and aligned with the pilot bearing. Modify the transmission cross-member if necessary to accommodate the manual unit. Bolt the cross-member into place and ensure all connections are secure. Shift through gears to confirm proper alignment and engagement.
4.4. Hydraulic System Bleeding and Testing
After installing the hydraulic components, use a pressure bleeder to purge air from the clutch master and slave cylinders. Ensure all connections are secure and free from leaks. Test the clutch pedal for proper engagement and disengagement. Bleed the system repeatedly until fluid flows consistently without air bubbles. Verify smooth operation by shifting through gears and checking for any spongy or inconsistent pedal feel.
Post-Swap Adjustments and Tuning
After the manual transmission swap, fine-tune the suspension for improved handling and consider upgrades like a limited-slip differential for better performance. Test the clutch and transmission thoroughly to ensure smooth operation and optimal performance.
5.1. Suspension and Chassis Adjustments for Better Handling
Post-swap, adjusting the suspension and chassis is crucial for optimal handling. Fine-tune suspension settings to accommodate the manual transmission’s weight distribution. Consider upgrading to stiffer coilovers or sway bars for improved stability. Chassis reinforcements or alignment adjustments may also be necessary to enhance cornering precision and overall drivability. These modifications ensure the Infiniti G35 handles more responsively, delivering a refined driving experience.
5.2. Optional Upgrades (Limited-Slip Differential, etc.)
After the swap, consider optional upgrades like a limited-slip differential to enhance traction and stability, especially during aggressive driving. Other upgrades may include lightweight components or engine modifications to maximize performance. These additions can further refine the driving experience, making the Infiniti G35 more responsive and enjoyable. Such upgrades complement the manual transmission, offering a more dynamic and capable vehicle overall.
5.3. Final Testing and Tuning of the Clutch and Transmission
After completing the swap, thorough testing of the clutch and transmission is essential. Check the clutch pedal feel, ensure smooth gear engagement, and verify hydraulic system functionality. Test drive the vehicle under various conditions to confirm proper operation. Fine-tune the clutch adjustment and transmission alignment if necessary. Ensure all components are functioning seamlessly before finalizing the setup. Proper testing ensures reliability and optimal performance of the manual transmission system.
Cost Considerations and Budgeting
Budgeting for a G35 auto-to-manual swap involves estimating parts like the clutch kit, transmission, and hydraulic components, as well as labor costs for installation.
6.1; Estimating Total Costs for Parts and Labor
The total cost for a G35 auto-to-manual swap includes parts like a clutch kit ($1,200), manual transmission ($1,500), and hydraulic components ($400). Labor costs for installation can range from $1,500 to $2,000, depending on the mechanic’s expertise. Additional tools and modifications, such as a clutch pedal assembly ($300) and specialized tools ($50), should also be budgeted. Overall, the total investment can range from $4,000 to $5,450.
6.2. Finding Cost-Effective Solutions and Used Parts
To save money, consider sourcing used parts like a T56 transmission or 350Z components, which are often compatible with the G35. Online forums and marketplaces like eBay or Facebook Marketplace frequently list these items at reduced prices. Additionally, local salvage yards may carry affordable options. Ensure all used parts are inspected and verified for functionality before purchase to avoid hidden costs.
6.3. Budgeting for Potential Additional Repairs or Upgrades
When budgeting for a manual swap, consider potential additional repairs, such as replacing the flywheel or hydraulic systems. Upgrades like a limited-slip differential or engine modifications may also be desired. Allocate extra funds for unforeseen issues, such as worn-out bearings or electrical faults. Additionally, budget for specialized tools or labor costs if DIY installation isn’t feasible. Plan for 10-20% extra to cover unexpected expenses during the swap.