Drivetrain Vibration
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,883
Likes: 124
From: Lubbock TX
Drivetrain Vibration
I have a friend that just bought a '79 and has had new brakes put on it along with suspension bushings, etc. He didn't get to drive it at any kind of speed before he bought it due to a carb issue. When he drives it now, he gets vibration thru the car that starts around 55mph and it rattles his teeth by 75. I'm guessing he has a driveshaft out of balance, but where would you guys start - main shaft or halfshafts. Anything else (other than a waaay out of balance engine) that would cause this?
Thanks in advance for all your help!
Thanks in advance for all your help!
Safety Car
Joined: Nov 2004
Posts: 4,359
Likes: 57
From: Mundelein Illinois
Before you start looking at drive shaft. I would get a front & rear end alignment. Make sure it is tracking proberly. With the alignment not set a vibration like your talking about is common.
If the stock trans is in the car I doubt it's the driveshaft.
If the stock trans is in the car I doubt it's the driveshaft.
Melting Slicks
Joined: May 2006
Posts: 2,369
Likes: 103
From: Centerville Louisiana
I have a friend that just bought a '79 and has had new brakes put on it along with suspension bushings, etc. He didn't get to drive it at any kind of speed before he bought it due to a carb issue. When he drives it now, he gets vibration thru the car that starts around 55mph and it rattles his teeth by 75. I'm guessing he has a driveshaft out of balance, but where would you guys start - main shaft or halfshafts. Anything else (other than a waaay out of balance engine) that would cause this?
Thanks in advance for all your help!
Thanks in advance for all your help!
Le Mans Master
Joined: Jun 2007
Posts: 7,801
Likes: 0
From: Crush your enemies, see them driven before you, and hear the lamentations of the women TX
I have a friend that just bought a '79 and has had new brakes put on it along with suspension bushings, etc. He didn't get to drive it at any kind of speed before he bought it due to a carb issue. When he drives it now, he gets vibration thru the car that starts around 55mph and it rattles his teeth by 75. I'm guessing he has a driveshaft out of balance, but where would you guys start - main shaft or halfshafts. Anything else (other than a waaay out of balance engine) that would cause this?
Thanks in advance for all your help!
Thanks in advance for all your help!
What RPMs are we talking here? If he pushes it in a slightly lower gear, to the same RPM level is it still vibrating at the same level as in a higher gear?
Too vague. If it starts vibrating at say, 2000 RPM in 4th gear at 55 MPH, does it also start vibrating if it hits 2000 RPM in 3rd gear?
Racer
Joined: Apr 2005
Posts: 494
Likes: 2
From: rockwall tx
instead of thinking drive shaft i would think U-joints. think about how old it is and lack of grease would still be in them. plus they are cheap to change and not that hard to do yourself. cheap and easy just like wheel balancing and alignment.
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