Vibration
Thread Starter
Cruising
Joined: Apr 2020
Posts: 11
Likes: 2
Vibration
I have a 64 convertible corvette. When driving about 60 mph, at times I feel a vibration. I replaced all 4 tires, rebalanced the tires and the rims are fine. Does anyone have some thoughts as to what this might be or what to check next? Thank you!
Race Director
Joined: Jan 2003
Posts: 17,723
Likes: 3,708
From: Central Arkansas
There's always the good old worn transmission tail housing bushing or worn transmission yoke (or both). If you can get under the car grab the driveshaft just behind the forward yoke at the tail end of the transmission and see if it has side to side and up and down play in it. If so, that is quite often a source of driveline vibration.
Worn shocks (completely shot - no resistance to movement) are also a possibility if you are unsure of their condition. Probably unlikely if you recently had tires replaced as they might have noticed.
Worn shocks (completely shot - no resistance to movement) are also a possibility if you are unsure of their condition. Probably unlikely if you recently had tires replaced as they might have noticed.
Thread Starter
Cruising
Joined: Apr 2020
Posts: 11
Likes: 2
Thank you for the responses they are very helpful...I suspected the U-joints as I noticed this after they were replaced. Also, I have drum brakes, I had them checked the other day because the car is pulling hard to the left when I hit the brakes. We found that the right front brake is not engaging at all I was told I have a bad master cylinder which may be the cause of brake fluid not getting to the right front wheel. Does this make sense or help with the vibration problem. After reading one of the links just sent, it indicates a bad brake drum could cause vibration.
Drifting
Joined: Apr 2006
Posts: 1,301
Likes: 342
From: New Hampshire
Your driveshaft could have thrown a weight. If you have a driveshaft shop close, take them the driveshaft with the slip yoke attached and have it balanced. Should be about $30.00. If the U joint is bad or if the slip yoke is worn they should find that.
I just read Frank's documents. Spot on. I needed 1.3 ounces added to my driveshaft.
I just read Frank's documents. Spot on. I needed 1.3 ounces added to my driveshaft.
Last edited by 63driver; Apr 12, 2020 at 09:25 AM.
Melting Slicks
Joined: Jun 2017
Posts: 2,271
Likes: 1,770
From: Central Michigan
2023 C1 of the Year Finalist - Modified
Thank you for the responses they are very helpful...I suspected the U-joints as I noticed this after they were replaced. Also, I have drum brakes, I had them checked the other day because the car is pulling hard to the left when I hit the brakes. We found that the right front brake is not engaging at all I was told I have a bad master cylinder which may be the cause of brake fluid not getting to the right front wheel. Does this make sense or help with the vibration problem. After reading one of the links just sent, it indicates a bad brake drum could cause vibration.
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Michael S. Palmer
Team Owner
Joined: Apr 2008
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From: Middle TN by way of KY, OH, VA, IL, CA, FL, NY, SC, HI
Thank you for the responses they are very helpful...I suspected the U-joints as I noticed this after they were replaced. Also, I have drum brakes, I had them checked the other day because the car is pulling hard to the left when I hit the brakes. We found that the right front brake is not engaging at all I was told I have a bad master cylinder which may be the cause of brake fluid not getting to the right front wheel. Does this make sense or help with the vibration problem. After reading one of the links just sent, it indicates a bad brake drum could cause vibration.
Who "checked" your brakes and determined "right front not engaging" and "brake fluid not getting to right front?" If the brakes are known to be off, and this is the level of problem finding and resolution (and you drove anywhere since), it smells like the understanding of brake functionality is insufficient to make any conclusions (which affect safety).
Seriously, do not stop, do not pass go, do not collect $200, IMO.
Fix vibration next.
Thread Starter
Cruising
Joined: Apr 2020
Posts: 11
Likes: 2
It was suggested as a problem by a tech who stated the master cylinder is leaking, But I can tell you when we have the front end raised on an alignment lift, when I hit the brake, the right front brakes did not engage at all and the wheel kept spinning. You are correct about the safety issue, I am not driving the car.
Thread Starter
Cruising
Joined: Apr 2020
Posts: 11
Likes: 2
The vibration is felt in the shifter, not the steering wheel. I suspect the u joint job was not done properly. I have a place close by Fisher Transmission and Driveline Service of NJ who are experts in these matters.
Team Owner
Joined: Aug 2007
Posts: 58,061
Likes: 7,146
Army
If you have original drum brakes hard pulling in one direction is nearly always, bad adjustment, rubber hose "hour glassing" internally or a leaky wheel cylinder oozing fluid. On rare occasions its a defective or greasy shoe/drum. Always on the side OPPOSITE of the pulling.
