G37 Manual Swap⁚ A Comprehensive Guide
This comprehensive guide explores the intricate process of performing a manual transmission swap on an Infiniti G37. It’s a popular modification for enthusiasts seeking enhanced driving engagement. Manual G37 sedans are a rarity, and this guide will help you!
The Infiniti G37, known for its blend of luxury and performance, originally came with both automatic and manual transmission options, specifically a 6-speed manual. However, the automatic variant was far more common. For G37 owners desiring a more connected driving experience, a manual transmission swap presents an appealing, albeit complex, solution. This conversion involves replacing the factory-installed automatic transmission with a manual one, typically sourced from a Nissan 370Z due to its compatibility with the G37’s VQ37VHR engine.
The swap is not a straightforward bolt-on affair; it necessitates careful planning, a comprehensive understanding of automotive mechanics, and access to the right tools and parts. Wiring modifications, ECU adjustments, and potential compatibility issues must be addressed. Despite the challenges, a successful G37 manual swap can significantly enhance driver engagement and overall driving pleasure. This guide provides a detailed overview of the process, covering everything from identifying suitable G37 models to sourcing parts, performing the swap, and troubleshooting potential issues.
Identifying G37 Models Suitable for Manual Conversion
The Infiniti G37, produced from 2008 to 2013, offers a range of models that can be considered for a manual transmission swap. While the G37 came in sedan, coupe, and convertible body styles, the suitability for conversion largely depends on factors beyond just the body configuration. Primarily, any G37 originally equipped with the VQ37VHR engine is a viable candidate. This engine was available across all body styles, meaning a sedan, coupe, or convertible can be converted.
However, the rear-wheel-drive (RWD) models are generally preferred for ease of conversion compared to the all-wheel-drive (AWD) G37x. The AWD system adds complexity to the swap, requiring additional modifications and potentially limiting transmission options. Although AWD manual swaps are possible, they involve more extensive work. Also, consider the car’s existing condition and mileage. A well-maintained G37 with lower mileage will generally be a better starting point. Inspect for any existing mechanical issues or signs of significant wear and tear. This will help you avoid compounding problems during the swap.
Required Parts for a G37 Manual Transmission Swap
Embarking on a G37 manual transmission swap necessitates gathering a comprehensive list of parts to ensure a successful conversion. At the heart of the swap is the transmission itself. The CD009 transmission, known for its robustness, is a popular choice, although other options exist. Accompanying the transmission is the clutch assembly, including the clutch disc, pressure plate, and throw-out bearing. A new flywheel, specifically designed for the G37’s VQ37VHR engine, is also essential. The transmission swap also needs a clutch master cylinder and slave cylinder.
Also, don’t forget about the clutch lines. The pedal assembly, encompassing the clutch, brake, and accelerator pedals, needs to be replaced with a manual-specific unit. The driveshaft, connecting the transmission to the differential, may need modification or replacement to match the manual transmission’s length. Interior trim pieces, such as the center console and shift boot, will need to be sourced from a manual G37 or aftermarket options. Finally, the ECU, or engine control unit, will require reprogramming to accommodate the manual transmission, or possibly an aftermarket ECU.
Sourcing a CD009 Transmission
The CD009 transmission is a highly sought-after component for G37 manual swaps due to its reputation for strength and reliability. Finding a suitable CD009 requires careful consideration of several factors to ensure compatibility and optimal performance. Used parts marketplaces are a prime source for locating CD009 transmissions, and online forums dedicated to Infiniti and Nissan vehicles often have classifieds sections where members list parts for sale. Local salvage yards can be another avenue for finding a CD009, although the transmission’s condition may vary;
When evaluating potential CD009 transmissions, thoroughly inspect them for any signs of damage or wear. Check the transmission casing for cracks or leaks, and rotate the input shaft to assess the smoothness of the gears. Inquire about the transmission’s history, including its mileage and any previous repairs or maintenance. Consider purchasing a CD009 from a reputable source that offers a warranty or guarantee to protect against unforeseen issues. Be prepared to pay a premium for a well-maintained CD009, as its value reflects its desirability and proven performance in manual swap applications.
DIY Guide for a G37 Manual Swap
Undertaking a G37 manual swap is a significant project best suited for experienced mechanics. The project requires a comprehensive understanding of automotive systems, and access to specialized tools. It’s essential to consult detailed guides and resources. Start by gathering all necessary parts, including the transmission, clutch, flywheel, and related hardware. Disconnect the battery and safely lift the vehicle, securing it on jack stands;
Remove the automatic transmission, carefully disconnecting all wiring and hoses. Install the manual transmission, ensuring proper alignment and torque specifications. Install the clutch, flywheel, and associated components, following the manufacturer’s instructions. Modify or replace the transmission tunnel as needed to accommodate the manual shifter. Connect the manual transmission wiring harness, addressing any necessary modifications. Install the clutch pedal assembly and master cylinder. Bleed the clutch system to ensure proper operation. Finally, lower the vehicle and test the manual transmission thoroughly, addressing any issues that arise.
This process requires precision and attention to detail to ensure a successful and reliable manual swap.
Wiring and ECU Considerations
Successfully completing a G37 manual swap hinges on addressing the intricate wiring and ECU (Engine Control Unit) requirements. The automatic transmission ECU must be bypassed or reprogrammed to avoid error codes and ensure proper engine function. Identifying and adapting the wiring harness for the manual transmission is crucial. This involves connecting the appropriate wires for the reverse lights, neutral safety switch, and potentially the vehicle speed sensor. In some cases, a standalone ECU might be necessary for optimal performance.
Consulting wiring diagrams and seeking expert advice is highly recommended. The ECU may need to be flashed or tuned to accommodate the manual transmission, optimizing fuel delivery and ignition timing. Incorrect wiring or ECU configuration can lead to various issues, including engine misfires, limp mode, or a complete inability to start the vehicle.
Careful planning and execution are essential to ensure seamless integration of the manual transmission with the G37’s electrical system. Thoroughly research the wiring differences between the automatic and manual models to avoid complications.
AWD G37x Manual Conversion
Embarking on an AWD G37x manual conversion presents a unique set of challenges compared to converting a RWD model. Finding a compatible AWD manual transmission is the primary hurdle. Nissan did not offer a manual transmission option for the AWD G37x. Therefore, sourcing a transmission from another vehicle, such as a Nissan Skyline, might be necessary, requiring significant modifications for proper fitment and function.
Ensuring compatibility with the G37x’s transfer case and front differential is crucial. Custom driveshafts may be needed to accommodate the different transmission length. The electronic systems, including the Vehicle Dynamic Control (VDC) and traction control, must be carefully considered and potentially recalibrated to work seamlessly with the manual transmission.
Despite the challenges, an AWD manual G37x can be a rewarding project for experienced mechanics. Thorough research, meticulous planning, and potentially custom fabrication are essential for success. The end result is a unique and highly desirable vehicle that combines the performance of a manual transmission with the all-weather capability of AWD.
Consider it a unique and desirable vehicle if correctly done!
Cost Analysis of a G37 Manual Swap
Undertaking a manual transmission swap on a G37 involves significant financial investment. The cost can vary widely depending on several factors, including parts sourcing, labor expenses, and the complexity of the conversion.
The primary cost component is the transmission itself. A used CD009 transmission, a popular choice for swaps, can range from $1,500 to $3,000, depending on its condition and mileage. Other essential parts include a clutch kit, flywheel, master cylinder, slave cylinder, and associated hardware, which can add another $1,000 to $2,000.
Labor costs can be substantial, especially if you’re not performing the swap yourself. Expect to pay a professional mechanic anywhere from $2,000 to $5,000 for the installation, depending on their hourly rate and the estimated time required. Additional costs may arise from unforeseen issues or modifications needed during the swap.
Wiring and ECU modifications can also contribute to the overall expense. A standalone ECU or a professional tuning service to remap the existing ECU can cost several hundred dollars. Considering all these factors, a G37 manual swap can easily range from $5,000 to $10,000 or more. Careful budgeting and research are crucial before starting this project.
Potential Issues and Troubleshooting
A G37 manual swap, while rewarding, can present various challenges. One common issue is driveline vibrations, often caused by an incorrect driveshaft length or improper installation. Addressing this may require custom driveshaft modifications or balancing.
Another potential problem lies within the clutch engagement. Issues like a soft pedal, difficulty shifting, or clutch slippage could stem from a faulty master or slave cylinder, air in the hydraulic lines, or an improperly adjusted clutch pedal.
Electrical gremlins are also common, especially concerning reverse lights, neutral safety switch, and ECU integration. Thoroughly checking wiring connections, consulting wiring diagrams, and potentially seeking professional tuning services are crucial for resolving these issues.
Furthermore, speedometer calibration can be inaccurate after the swap. This might necessitate adjustments to the ECU or the installation of a speedo correction device.
Difficulty finding compatible parts, especially for AWD models, can also stall the project. Thorough research, patience, and potentially fabricating custom parts might be necessary.
Finally, be prepared for unforeseen mechanical issues. A comprehensive understanding of the G37’s mechanics, access to diagnostic tools, and a willingness to troubleshoot are essential for a successful manual swap.
Performance Upgrades After the Swap
Once the manual swap is complete, a new realm of performance enhancements opens up for your G37. Given the improved driver engagement and control, many enthusiasts opt for further modifications to maximize the car’s potential.
One popular upgrade is a lightweight flywheel and performance clutch. This combination reduces rotational mass, resulting in quicker engine response and faster acceleration. However, it’s crucial to choose a clutch that matches your power goals and driving style.
Short shifter kits are another common upgrade, providing shorter throws and a more precise shifting experience. These kits enhance the feeling of connection with the car and can improve shift times.
ECU tuning is essential to optimize the engine’s performance with the manual transmission. A professional tune can refine the air-fuel ratio, ignition timing, and other parameters, resulting in increased horsepower and torque.
Upgrading the exhaust system can also improve performance and sound. A cat-back exhaust or full exhaust system reduces backpressure, allowing the engine to breathe more freely.
Finally, consider upgrading the suspension and brakes to handle the increased performance. Stiffer springs, adjustable dampers, and performance brake pads will improve handling and stopping power, ensuring a well-rounded driving experience.
Finding Manual G37 Sedans
Locating a G37 sedan equipped with a manual transmission can be a challenging endeavor, as they were produced in limited numbers. However, with patience and the right resources, it is possible to find one.
Online marketplaces, such as Autotrader and CarGurus, are excellent starting points for your search. Utilize specific keywords like “G37 manual sedan” or “G37S manual sedan” to narrow down the results. Be sure to check listings frequently, as new cars are added daily.
Infiniti forums and enthusiast communities can also be valuable resources. Members often post listings for cars they are selling, and you may find someone willing to part with their manual G37 sedan. Additionally, these communities can provide valuable insights into the car’s history and potential issues.
Consider expanding your search radius beyond your local area. You may need to travel or arrange for transportation to acquire the car, but it can significantly increase your chances of finding a manual G37 sedan.
Be prepared to act quickly when you find a promising listing. Manual G37 sedans are in high demand, and they tend to sell quickly. Have your financing in order and be ready to make an offer.
Finally, be thorough in your inspection of the car before making a purchase. Check for any signs of damage or wear, and have a mechanic inspect the car for any potential mechanical issues.
Alternative to Full Manual Swap⁚ Sport Brake Pedal Conversion
While a full manual transmission swap offers the ultimate driving experience, it’s a complex and costly undertaking. For those seeking a more subtle enhancement, a sport brake pedal conversion presents a viable alternative.
This modification involves replacing the factory brake pedal with a sportier version, often featuring a brushed metal finish and rubber grips. While it doesn’t alter the car’s transmission, it can improve the aesthetics and feel of the driving experience.
Sport brake pedal conversion kits are readily available online and from aftermarket parts retailers. These kits typically include the brake pedal and installation hardware. Some kits may also include a matching accelerator pedal for a more cohesive look.
The installation process is relatively straightforward and can be completed with basic tools. However, it’s essential to follow the instructions carefully to ensure proper installation and avoid any safety issues.
A sport brake pedal conversion offers a cost-effective way to personalize your G37’s interior and add a touch of sporty flair. It’s a simple modification that can make a noticeable difference in the overall driving experience.
Before undertaking any modification, research thoroughly and ensure the parts are compatible with your G37 model. Consider consulting with a qualified mechanic for guidance and assistance, especially if you’re unfamiliar with automotive modifications.