Driveshaft Balance???
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
I guess I should have said engine rpm related. If it does it at the same rpm no matter which gear then I would think it is engine related.You said earlier when pushing in on the clutch it went away...the transmission,drive shaft,rear end and etc. is still going the same speed including the clutch disc when coasting.
Burning Brakes
Joined: Feb 2006
Posts: 1,223
Likes: 4
From: Regina Saskatchewan
Did you have the tires balanced on a GSP9700 road force balancer? If not, you could have a harmonic vibration in the tire itself. www.gsp9700.com has a shop locater.
This is what you have to look for especially for higher speeds. A buddy of mine has a C5 and likes to fly. He had a vibration at higher speeds and had his tires balanced repeatedly
Finally had it road force balanced and it took care of it.
Little more money but worth it.
Intermediate
Joined: Apr 2006
Posts: 26
Likes: 0
From: Stamford CT
For what's worth, here's what I did with a slower speed vibration (60 to 70 mph) with my '74:
1. Balanced tires;
2. Had an alignment;
3. Replaced Goodyear tires with Firestone;
4. Snugged up steering box;
5. Replaced two drive line U-joints;
6. Replaced worn idler arm;
6. Turned drive shaft around, there is a front and back but who knows
if it makes a difference;
7. Had rims tured and;
8. Experimented with tire pressure (I checked with Firestone Tech
and obtained speed/pressure range).
Everything seemed to help a little, the rim truing and tire pressure really made a difference. It seems high tire pressure on I-95 at 70 mph was part of problem. The trucks really do a number on the road and Corvette suspension, at least mine which is not stock (composite rear spring and 255/60R15 tires) seems to wonder and bounce a little.
If you want to have the rims trued you will have to look around, seems today the shops only want to work on alloy rims. Hope this helps. Bill
1. Balanced tires;
2. Had an alignment;
3. Replaced Goodyear tires with Firestone;
4. Snugged up steering box;
5. Replaced two drive line U-joints;
6. Replaced worn idler arm;
6. Turned drive shaft around, there is a front and back but who knows
if it makes a difference;
7. Had rims tured and;
8. Experimented with tire pressure (I checked with Firestone Tech
and obtained speed/pressure range).
Everything seemed to help a little, the rim truing and tire pressure really made a difference. It seems high tire pressure on I-95 at 70 mph was part of problem. The trucks really do a number on the road and Corvette suspension, at least mine which is not stock (composite rear spring and 255/60R15 tires) seems to wonder and bounce a little.
If you want to have the rims trued you will have to look around, seems today the shops only want to work on alloy rims. Hope this helps. Bill
Thread Starter
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
I GOT IT!!! BUT it looks like crap
I went to my BMW dealer after standing on my head and spitting wooden nickels he balanced my tires for a cash only deal.
The only problem was one wheel that will not balance without putting a weight on the front of the rim and it looks like crap but it works. I have one more trick I can use and that is break the bead, rotate the tire 180 degrees and rebalance. WELL thats my report. I want to thank everyone who helped me and I hope this thread helps anyone else who has this problem
I went to my BMW dealer after standing on my head and spitting wooden nickels he balanced my tires for a cash only deal. The only problem was one wheel that will not balance without putting a weight on the front of the rim and it looks like crap but it works. I have one more trick I can use and that is break the bead, rotate the tire 180 degrees and rebalance. WELL thats my report. I want to thank everyone who helped me and I hope this thread helps anyone else who has this problem
