Suspension Control Arm Bushing Replacement for the 1973-1977 Chrysler 300
Eliminate suspension clunks and restore the smooth ride your classic C-Body was known for.
- Verify your exact model year before ordering; 1973 and 1974-1977 C-Body cars use different bushings.
- Choose between standard rubber bushings for original ride comfort or polyurethane for increased performance and durability.
- Replacement is labor-intensive and requires a shop press, making it a difficult job for most DIY mechanics.
- A professional wheel alignment is mandatory after replacing control arm bushings to ensure safety and prevent tire damage.
Is Your Chrysler 300 Making Noise Over Bumps?
Worn control arm bushings are a common problem on any older vehicle, and the 1973-1977 Chrysler 300 is no exception. After decades of use, the original rubber bushings dry out, crack, and lose their ability to hold the control arms securely. This leads to a variety of issues that can make your car feel loose and unsafe.
Symptoms of Bad Control Arm Bushings
- Clunking or Rattling Sounds: The most common sign is noise from the front suspension when driving over bumps or uneven roads. This is caused by metal-on-metal contact as the worn bushing allows for excessive movement.
- Steering Wander: You may feel the steering wheel pull to one side, or the car may feel like it's wandering on the highway. Worn bushings allow the wheel alignment to shift during driving.
- Uneven Tire Wear: Incorrect alignment caused by bad bushings can lead to accelerated and uneven wear on the inner or outer edges of your front tires.
- Poor Handling: The car may feel less responsive and unstable, especially during turns.
Critical Fitment Information: Check Your Year!
The control arm bushings for this generation of Chrysler 300 are not all the same. There is a split between model years:
- 1973 models use a different set of bushings than later years.
- 1974-1977 models share bushings with other C-Body cars from that specific period.
Always verify the part fits your exact model year before ordering. Searching for parts for a "Chrysler C-Body" will yield more results than searching for a "Chrysler 300" alone.
Choosing the Right Aftermarket Bushings
New Original Equipment (OEM) bushings from Chrysler are no longer available for this vehicle. All replacements are from the aftermarket. You have two main choices: rubber or polyurethane.
Standard Rubber Bushings
These are designed to be just like the original factory parts. They provide a comfortable, quiet ride by effectively absorbing vibrations. For owners seeking to maintain the car's original feel, rubber is the best choice. Brands like Moog and various restoration-focused suppliers offer quality rubber replacement bushings.
Polyurethane (Poly) Bushings
Polyurethane is a type of plastic that is much firmer and more durable than rubber. Brands like Energy Suspension specialize in these.
- Pros: Poly bushings don't deflect as much as rubber, which can sharpen steering response and improve handling. They are also resistant to oil and chemicals and last much longer.
- Cons: The stiffness that improves performance can also lead to a harsher ride. More noise and vibration from the road may be felt inside the car. They can also be prone to squeaking if not lubricated properly during installation.
Pro Tip: For a street-driven classic, most owners will be happiest with the ride quality of standard rubber bushings. Polyurethane is a great upgrade for vehicles that will see more performance-oriented driving.
Estimated Costs for Replacement
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Bushings (Rubber or Poly) | $50 - $200 (for a complete front set) |
| Shop Labor | $500 - $900 |
| Wheel Alignment (Required) | $100 - $200 |
Frequently Asked Questions (FAQ)
Do I have to replace the whole control arm?
No. Unlike many modern cars, you can typically buy and replace just the bushings for your 1973-1977 300. However, if the control arm itself is bent, heavily rusted, or damaged, it should be replaced.
Is this a good DIY job?
This is an advanced DIY job. Removing and installing control arm bushings requires special tools, including a heavy-duty ball joint separator, a torsion bar unloading tool, and a hydraulic shop press to push the old bushings out and the new ones in. Without a press, the job is extremely difficult. For most owners, having a professional shop perform the replacement is the best option.
Do I need a wheel alignment after replacing the bushings?
Yes, absolutely. Replacing the control arm bushings will change your car's suspension geometry. A full four-wheel alignment is required to ensure proper handling, prevent tire wear, and make the car safe to drive.
Should I replace upper and lower bushings at the same time?
It is highly recommended. If the lower bushings are worn out, the uppers are likely in similar condition. Replacing all of them at once saves you from having to do the job twice and ensures your suspension is completely refreshed. It also ensures the new alignment will be accurate and hold for a long time.
Technical Specifications
Fitment is specific to the Chrysler C-Body platform. Aftermarket parts are available in both OEM-style rubber and performance polyurethane. Notable part numbers include Moog K7070B (1974-78 Uppers) and CPP FB290 (1965-77 Lower Rubber). Always confirm part numbers with the vendor for your specific year.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.