1. Sourcing Parts:
* Coil Springs: You'll need to find coil springs compatible with your Town Car's chassis. This isn't a straightforward task; you can't just grab springs from any car. You'll likely need to research aftermarket suppliers specializing in classic car parts or potentially source them from a donor car (another Town Car, perhaps a non-air ride model from a similar year). The spring rate (stiffness) will affect the ride quality; you'll want something that provides a reasonable balance between comfort and handling.
* Shocks/Struts: You'll also need shocks or struts designed to work with coil springs. Again, compatibility is crucial; improper selection can lead to poor handling, premature wear, and even damage.
* Mounting Hardware: The air ride system uses specific brackets and mounting points. You'll likely need to fabricate new brackets to properly mount the coil springs and shocks to the chassis. This requires welding and fabrication skills.
* Upper and Lower Control Arms (Possibly): Depending on the specific design of the air suspension, the control arms might need modification or replacement to accommodate the coil springs.
2. Removal of Air Ride Components:
* This involves removing air bags, air lines, compressors, tanks, valves, and all associated hardware. Be prepared for some tedious work disconnecting and removing these components carefully. You'll need to document everything as you go.
3. Fabrication and Installation:
* This is the most challenging part: You'll likely need to fabricate custom mounting brackets to securely attach the new coil springs and shocks. This typically requires welding skills and access to a welder. You might also need to modify or replace existing chassis components.
* Install new coil springs and shocks. Follow the proper installation sequence to ensure everything aligns correctly.
* Inspect and Replace: Inspect all suspension components such as bushings, ball joints, and tie rod ends while you're working. Replace any worn or damaged parts.
4. Alignment:
* After installing the coil springs and shocks, a wheel alignment is absolutely essential. The geometry of your suspension will have been significantly altered. A proper alignment ensures safe and proper handling.
5. Testing:
* After everything is installed, thoroughly test the vehicle. Pay close attention to handling, ride quality, and the absence of any unusual noises or vibrations.
Important Considerations:
* Safety: This is a significant modification. Improperly installing the coil springs can severely impact the handling and safety of your vehicle. If you lack experience in automotive mechanics and fabrication, this project is best left to a professional.
* Cost: The cost of parts, labor (if you're paying someone), and potential unforeseen issues can add up quickly.
* Ride Quality: The ride quality might be different from the air ride system. Coil springs will typically offer a firmer ride.
In short: Converting your Town Car's air ride to coil springs is a complex project that requires significant mechanical and fabrication skills. Unless you're experienced with automotive repair and fabrication, it's strongly advised to seek the services of a qualified mechanic specializing in classic car restoration. Trying this without the necessary experience could result in a poorly functioning and unsafe vehicle.
