Suspension Control Arm Bushing Guide for the 1983-1987 Chrysler 300
Having trouble finding control arm bushings for your G-Body 300? Here's what you need to know.
- Do not search for parts for a '1983 Chrysler 300'; instead, search for control arm bushings for a '1983-1989 Dodge Diplomat' or 'Chrysler Fifth Avenue' to find compatible parts.
- Choose between standard rubber bushings for a factory ride or upgrade to polyurethane for improved performance and durability.
- A bushing press tool is required for this job; it can often be rented from auto parts stores.
- Thoroughly inspect the control arm mounting points for rust before starting the repair, as this can complicate the process.
Why Can't I Find Bushings For My 1983-1987 Chrysler 300?
If you've been searching for suspension control arm bushings specifically listed for your 1983-1987 Chrysler 300, you've likely found that parts are either unavailable or incorrectly listed for the newer 2005+ models. This is because the '83-87 300 was a limited-production model based on Chrysler's G-body platform. However, this platform shares its core suspension design with the much more common Chrysler M-body cars, such as the 1977-1989 Dodge Diplomat, Plymouth Gran Fury, and Chrysler Fifth Avenue. Therefore, to find the correct parts, you must search for control arm bushings for these M-body vehicles.
Symptoms of Failing Control Arm Bushings
Worn bushings can make your classic Chrysler feel sloppy and unsafe. Watch for these common signs:
- Clunking or Popping Noises: A metallic clunking sound, especially when going over bumps or making sharp turns, is a primary indicator. This is the sound of the control arm moving excessively and hitting the frame.
- Poor Steering Response: You may notice a delay or vagueness in the steering. The steering wheel might not return to center easily after a turn.
- Uneven Tire Wear: Bad bushings prevent the wheels from staying properly aligned. This often results in accelerated wear on the inner or outer edges of your front tires.
- Visible Cracks or Damage: A visual inspection can reveal dried, cracked, or crumbling rubber on the bushings. You might also see the center metal sleeve has shifted out of position.
A Note on Rust
Vehicles from this era are prone to rust, especially around the suspension mounting points. A simple bushing replacement can become a much larger job if the mounting brackets or frame sections are heavily corroded. Always inspect the area thoroughly before beginning work.
Choosing the Right Aftermarket Bushings
Since new OEM Mopar parts are no longer available, your choice is between two types of aftermarket bushings. Your decision depends on your driving style and goals for the car.
Standard Replacement (Rubber)
These are designed to mimic the original factory parts. They provide a comfortable ride by effectively absorbing vibrations. Brands like MOOG are a common choice for OEM-style rubber replacements and are widely available for the compatible M-body platform.
- Pros: Quiet operation, comfortable ride, lower cost.
- Cons: Less precise handling, shorter lifespan than polyurethane.
Performance Upgrade (Polyurethane)
Polyurethane is a much stiffer material than rubber. This reduces suspension flex, resulting in sharper steering response and improved handling. Brands like Energy Suspension and Prothane offer polyurethane kits for compatible M-body cars.
- Pros: Improved handling and performance, very durable.
- Cons: Can make the ride feel firmer or harsher, may squeak if not lubricated properly during installation.
Pro Tip: Replace in Pairs
Always replace control arm bushings in pairs (both left and right sides) to ensure even handling and suspension performance. It's also wise to consider replacing both upper and lower control arm bushings at the same time if your budget allows.
Cost of Replacing Control Arm Bushings
| Part Type | Estimated Cost (Parts Only) |
|---|---|
| New OEM (Mopar) | Not Available |
| New Aftermarket (Rubber - e.g., MOOG) | $25 - $75 per control arm |
| New Aftermarket (Polyurethane - e.g., Energy Suspension) | $50 - $100 for a complete front kit |
| Shop Labor | $250 - $500 |
Note: Costs are estimates based on parts for the cross-compatible Dodge Diplomat and may vary based on brand, location, and vehicle condition.
Frequently Asked Questions
Are control arm bushings from a Dodge Diplomat a guaranteed fit?
Yes, the 1983-1987 Chrysler 300 is based on the G-body, which shares its suspension architecture with the M-body platform (Dodge Diplomat, Plymouth Gran Fury). Parts like control arm bushings are interchangeable. Always double-check the listed model years (e.g., 1977-1989) when ordering.
Should I choose rubber or polyurethane bushings?
Choose rubber if you want to maintain the original, comfortable ride quality of the car. Choose polyurethane if you are seeking improved handling, a more connected road feel, and longer-lasting parts, and you don't mind a slightly firmer ride.
Do I need a special tool to replace the bushings?
Yes, replacing pressed-in bushings requires a special tool. A ball joint press or a dedicated bushing press tool is necessary to safely remove the old bushings and install the new ones without damaging the control arm. Many auto parts stores offer these tools for rent.
Will new bushings fix my car's alignment problem?
Replacing worn control arm bushings is often a necessary first step to fixing alignment issues, but it is not the final step. After the new bushings are installed, you MUST have a professional wheel alignment performed to adjust the camber, caster, and toe to the correct specifications.
Were there any recalls for the 1983-1987 300 suspension?
No, searches of the NHTSA database show no specific recalls or technical service bulletins (TSBs) related to the suspension control arm bushings for this vehicle.
Technical Specifications
Compatibility with Chrysler M-Body platform (1977-1989). Available in OEM-style rubber or performance polyurethane. Requires press-fit installation.
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.
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