1976 Driveshaft
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
1976 Driveshaft
I have been trying to figure out what is causing a thumping problem in my 1976 L48 Automatic. It is most noticeable at city speeds and thumps faster as you speed up. Although, sometimes it is fine and there is no noise at all.
I was under the car today (I really need to buy a lift) and I noticed a weight attached to the driveshaft using a zip tie. Needless to say it moves which probably explains by the noise is there sometimes and sometimes not.
Anyway, it seems that I should check the balance on it. Do shops do this on the car or should I take it off and deliver it? Any other recommendations.
Thanks,
Bill
I was under the car today (I really need to buy a lift) and I noticed a weight attached to the driveshaft using a zip tie. Needless to say it moves which probably explains by the noise is there sometimes and sometimes not.
Anyway, it seems that I should check the balance on it. Do shops do this on the car or should I take it off and deliver it? Any other recommendations.
Thanks,
Bill
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
you have the drive shaft and yoke balanced at the same time off of the car at a drive line shop.....you need to take them both.....a weight held on by a zip tie is not the way to do it.
Race Director
Joined: Sep 2002
Posts: 10,362
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From: San Diego - Deep Within The State of CONFUSION!
While I agree with that statement, I doubt that is the source of his thumping. The very first thing I would check is for a tire that is out of round or separated.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
Tires seem fine. I am wondering if the out of balance driveshaft has wrecked one of my u-joints. I noticed that I will have to replace the transmission seal so when I have it out I will check everything.
I am going to call tomorrow to see what this will cost. I wonder if it will be cheaper to buy a new one.
I am going to call tomorrow to see what this will cost. I wonder if it will be cheaper to buy a new one.
