Complete Guide to Converting a FWD to RWD

Converting a front-wheel drive (FWD) vehicle to a rear-wheel drive (RWD) can drastically alter the performance and handling of your vehicle. This process is highly complex and requires a good understanding of vehicle mechanics. In this comprehensive guide, we will walk you through the main steps involved in this conversion, ensuring you are well-prepared to take on this challenging project.

Planning and Research

Select a Suitable Vehicle

Not all FWD cars are created equal. Some models have a strong aftermarket support base, making them more favorable for RWD modifications. Conduct thorough research to find vehicles that are commonly converted to RWD. Join forums and browse guides specific to your vehicle model to understand the unique challenges and requirements you might face.

Gather Information

Exhaustive research is key to a successful RWD conversion. Look for detailed guides, videos, and forum discussions that pertain to your specific vehicle. Understanding the intricacies of the conversion will help you make informed decisions and avoid potential pitfalls.

Gather Necessary Parts

RWD Drivetrain Components

To convert your vehicle, you will need several critical parts. A compatible rear axle, a driveshaft, a transmission, and possibly new engine mounts are essential. Ensure that these components are both compatible and of high quality to ensure a smooth conversion process.

Suspension Components

RWD setups often require a significant change in suspension geometry. You may need to acquire new control arms, shocks, and springs. These components are crucial for maintaining the vehicle's stability and handling.

Miscellaneous Parts

Miscellaneous components such as a custom exhaust, fuel lines, and different brake components may also be necessary. This step requires careful planning and sourcing to ensure all parts fit and function correctly.

Remove Existing FWD Components

Engine and Transmission

The first step in the conversion process is to remove the FWD engine and transmission. Disconnecting wiring, hoses, and exhaust systems will simplify this step. Ensure all connections are properly disconnected and secured to prevent damage.

Front Suspension and Axles

The front suspension and axles must also be removed. These components will be replaced with RWD-specific parts, so taking accurate measurements and careful notes will be crucial.

Modify the Chassis

Reinforce the Chassis

RWD setups often involve a change in weight distribution, which can place additional stress on your vehicle's chassis. Reinforcement may be necessary to ensure the chassis can handle this transition. Research and implement any necessary modifications to your chassis.

Create Mounting Points

Mounting points for the new RWD components need to be fabricated or modified. This step can be complex, so detailed planning and precise measurements are essential. Ensure that all new components are securely mounted to the chassis.

Install RWD Drivetrain

Install Rear Differential

The rear differential must be mounted in the correct position on the rear of the chassis. This step requires precise alignment and secure installation to ensure the drivetrain functions correctly.

Install Driveshaft

Connect a driveshaft from the transmission to the rear differential. Ensure that the driveshaft is properly aligned and secured to prevent any issues down the road.

Install New Transmission

If a new transmission is necessary, install one that is RWD-compatible. Pay careful attention to the fit and function of the new transmission to prevent any problems with the drivetrain configuration.

Rear Suspension Installation

Install RWD Suspension

Fit the new rear suspension components that are designed for a RWD setup. This step is critical for maintaining the vehicle's stability and handling. Ensure that all components are properly installed and securely fastened.

Align the Suspension

Proper alignment is essential to ensure the vehicle handles correctly. Take the time to align the rear suspension components to optimize the vehicle's performance.

Wiring and Electronics

Electrical Modifications

Modify or replace wiring harnesses to accommodate any new sensors, ECU, and components specific to the RWD setup. Ensure that all electrical connections are secure and functioning correctly.

Install New Fuel System

If the fuel delivery system needs upgrading, install new fuel lines, pump, and tank as necessary. This step ensures that the vehicle's fuel system is compatible with the new drivetrain configuration.

Testing and Tuning

Initial Testing

Once all components are installed, conduct initial tests to ensure that the vehicle operates correctly. This step is crucial to identify any issues and make necessary adjustments.

Tuning

You may need to tune the engine and transmission to work optimally with the new drivetrain configuration. This step ensures that the vehicle performs at its best without any issues.

Legal and Safety Considerations

Ensure that your conversion complies with local vehicle regulations and safety standards. It is also essential to have the vehicle inspected by a professional to ensure it is safe to drive. Compliance with these standards can prevent potential legal and safety issues.

Conclusion

This conversion is not for the faint of heart and typically requires advanced mechanical skills, access to tools, and possibly professional assistance. Consulting with or hiring professionals who have experience with such conversions is highly recommended to ensure the best outcome. With careful planning, attention to detail, and the right resources, you can successfully convert your FWD vehicle to RWD.