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Stick shifter vibration

 
Old 02-20-2016, 11:04 PM
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RG70
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Default Stick shifter vibration

I have a 1970 L46 4 speed manual tran Corvette. When I run through the gears and at 3000 to 3500 rpm's I am experiencing vibration in the stick shifter. The vibration is also noticeable when cruising at around 65 to 70 mph. I would appreciate any information you could provide me on what is causing this issue and how to fix it. Thanks
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Old 02-20-2016, 11:07 PM
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Nowhere Man
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Is the vibration there if you push the clutch pedal in? Is it speed related or RPM related with no diffreance as to what gear your in?
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Old 02-21-2016, 08:59 AM
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C3 4ME
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Does it have the stock or an aftermarket shifter?
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Old 02-21-2016, 12:13 PM
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Could be the pilot bearing. Did you have new U joints installed on the drive shaft? I had a 72 LT1 that developed a vibration after I changed the U joints. Upon investigation, I discovered that the joint to the rear end I had installed with the grease fitting facing the pinion. This allowed the casing hump to touch the pinion shaft every revolution. Just lucked out finding that issue.
Good luck.
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Old 02-24-2016, 03:15 PM
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RG70
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Originally Posted by Nowhere Man View Post
Is the vibration there if you push the clutch pedal in? Is it speed related or RPM related with no diffreance as to what gear your in?
Thanks, when I take it out winter storage I will check this out
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Old 02-24-2016, 03:25 PM
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65GGvert
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Are you talking a rattle, or an actual vibration?
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Old 02-24-2016, 08:06 PM
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My 70 had a small buzz/rattle at about 3000 RPM's and above

I bought a shifter rebuild kit, which cost about $50. The link below is the instructions for installing the complete kit.

1964-1981 Corvette 4-Speed Shifter Rebuild
http://www.corvettemagazine.com/tech...ifter-rebuild/

I actually only installed the new T-handle and spring and it cured 90% of the problem. I'll finish the project when I get more time and I'm guessing it will fix the remaining buzz problem.

There is also a cheat/bubba fix you can use for the time being which is simple, cheap, takes about 2 minutes to install and works surprisingly well.

Unscrew the shift ball and pull off the spring and T-handle. Then get a small O-ring that fits snugly on the "step" on the lever below the T-handle seating area, then re-install the T-handle, spring, and ball. The O-ring will stop much of the vertical buzz between the bottom of the T-handle barrel and the "step" on the lever. It's well worth the 15 cent O-ring.

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Old 02-25-2016, 11:55 AM
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Hi guys. While you are pondering this vibration issue, I would like to jump in with my problem also.

I have a newly acquired 1970 L46 convertible, that is having vibration issues at the mid range revs (3,000 - 3,500) and on up. It does not matter if you are stopped in neutral or rolling at 60 -70. Push on the gas, and you get vibration through the seat, and up through the stick..

I got past a timing challenge at idle, but still not sure if it is missing later as the revs go up.

Thoughts are welcomed.

Bill
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Old 02-09-2019, 03:34 PM
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domenic tallarita
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Forgot to say how I knew it was at the flywheel or clutch. I ran the engine up to around 4K while the car was not moving and the shifter vibrated.

Dom
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Old 02-10-2019, 06:22 PM
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JoeMinnesota
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I had this issue in the past with a 67 Camaro also a Muncie. The car was run at the strip a few times and vibration as you describe. Ended up being a sprin/tweaked input yoke on the rearend. The problem could be virtually anywhere in the drivetrain. Replaced the front yoke and problem solved. Obviously it did not vibrate at a standstill.
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Old 02-11-2019, 04:25 PM
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69Vett
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original 4 speed corvette shifter mounts to the frame, not the transmission, this should eliminate most driveline vibration.
(aftermarket / Hurst) mount to the transmission, much more prone to transmitting drive-line vibration.
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Old 02-11-2019, 05:07 PM
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domenic tallarita
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Originally Posted by 69Vett View Post
original 4 speed corvette shifter mounts to the frame, not the transmission, this should eliminate most driveline vibration.
(aftermarket / Hurst) mount to the transmission, much more prone to transmitting drive-line vibration.
Very good point but the shifting rods attached to the trans go to the shifter.

Dom
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