[C2] Still have a slight shimmy in steering wheel ???
Thread Starter
Instructor
Joined: Jan 2025
Posts: 219
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Still have a slight shimmy in steering wheel ???
I have new Diamond Back tires and CA 1965-1966 Corvette Direct Bolt-On Knock-Off Wheels fully balanced on my 66 coupe.
I still have a slight shimmy when I am cruising at 55-65 but when I push the clutch in the shimmy goes away. I do feel it in the steering wheel and the car. Could this be my driveshaft U joints?
What else should I check? Should I get a front and rear wheel alignment?
I still have a slight shimmy when I am cruising at 55-65 but when I push the clutch in the shimmy goes away. I do feel it in the steering wheel and the car. Could this be my driveshaft U joints?
What else should I check? Should I get a front and rear wheel alignment?
Le Mans Master
Joined: Feb 2014
Posts: 8,871
Likes: 5,410
From: Richardson Texas
While it's unlikely to be a wheel/tire issue if the vibration disappears when you push in the clutch, there is a slight possibility it could be a bent wheel. More likely, there is an issue with the drivetrain.
To confirm if it's the engine or the drivetrain, try this: While at highway speeds and experiencing the vibration, push the clutch in and briefly rev the engine to the RPM you were just driving at. If the vibration returns while coasting but revving, it’s an engine/flywheel issue. If it stays gone, it’s likely your U-joints on, either, the driveshaft or the half shafts.
To confirm if it's the engine or the drivetrain, try this: While at highway speeds and experiencing the vibration, push the clutch in and briefly rev the engine to the RPM you were just driving at. If the vibration returns while coasting but revving, it’s an engine/flywheel issue. If it stays gone, it’s likely your U-joints on, either, the driveshaft or the half shafts.
Race Director
Joined: Jan 2003
Posts: 17,652
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From: Central Arkansas
You might check your rear transmission bushing and yoke for wear. Grab the u-joint of the yoke and try to move it up and down. If there is play in it, it can cause a vibration at speed that might feel like a shimmy in the suspension. There are tools for pulling and installing a new bushing without having to disassemble the transmission.
Thread Starter
Instructor
Joined: Jan 2025
Posts: 219
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Le Mans Master
Joined: Feb 2014
Posts: 8,871
Likes: 5,410
From: Richardson Texas
Thread Starter
Instructor
Joined: Jan 2025
Posts: 219
Likes: 16
I live in a congested area in NJ. Not to many places to bring it to that speed. As I was on the highway today I forgot to push it in and try that.I will next week and report back.
