Reminds me of my first car, a $700 Valiant. Did a 650 mile trip to a coal mine for work experience as a student. Couldn't drive it at 60 mph because of the shake in the front end but could cruise at 55 or 65mph. Did have the idler and pitman arm replaced by that stage. Problem was worn upper ball joint. My theory was because it is lightly loaded compared to bottom ball joint, slack would allow it to vibrate at a certain frequency. Easy to check with car on the ground by pulling sideways back and forth on the top of the tyre. Any movement means replace.
Can't remember the places I got my 300C parts from and was quite a while ago. But I recommend two things. Use polyurethane for strut rod bushes. Original rubber collapses, steering the car to go into the next lane when you slam on the brakes, and doesn't last very long. Also get a roller bearing kit to replace the rubber bush in the idler. Another thing that wears out fast and lets your steering go wonky. Try Google and Ebay.
I have done both mods to my 300C because my current daily driver Valiant wagon has had them for over 20 years and still as good as new. As a bonus, you will notice how precise your steering feels compared to new stock parts.
Henry
-----Original Message-----
From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of Gary Gettleman
Sent: Sunday, 9 November 2025 9:50 AM
To: Club International Chrysler <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} 1957 300 C
Sent from my iPaid
Looking for made in the USA source that will have all or most off the rubber parts as well as the metal parts required to rebuild front suspension on the C.
Had shop rebuild suspension in 2000-2001, but still having issues with clunks and vibration around 55 mph.
Thank
Sent from my iPad
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