Got the "Shakes"
Thread Starter
Heel & Toe
Joined: Dec 2005
Posts: 17
Likes: 0
From: Island Lake Illinois
Got the "Shakes"
Never had this happen before, a very noticible shake occures in the front end between 50 and 65mph, and then again when slowing down from 70. smooth and straight before and after.
It's a 68 BB roadster, all new joints , bushings, steering box, front end alignment, new TA radials balanced 3 times so far. I've even put the rear tires on the front and it's not half as bad, but still noticeable.
235/70R15 rear 225/70R15 front. This shaking did not happen before the front end was overhauled. Thanks ahead of time for any help.
Gluntly
It's a 68 BB roadster, all new joints , bushings, steering box, front end alignment, new TA radials balanced 3 times so far. I've even put the rear tires on the front and it's not half as bad, but still noticeable.
235/70R15 rear 225/70R15 front. This shaking did not happen before the front end was overhauled. Thanks ahead of time for any help.
Gluntly
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Something isn't right (obviously) I would get under there and go over everything with a torque wrench. My initial reaction was wheels/tires and it still may be your problem. Depending on where you got them ballanced they may not have the capability to correctly hi speed balance them. I can't remember what the name of the machine that was recommended in here a couple months ago for this. Someone will chime in. Also do a search on wheel ballancing. But my first step would be check torque on all the suspension components to make sure.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by SIXFOOTER
Something isn't right (obviously) I would get under there and go over everything with a torque wrench. My initial reaction was wheels/tires and it still may be your problem. Depending on where you got them ballanced they may not have the capability to correctly hi speed balance them. I can't remember what the name of the machine that was recommended in here a couple months ago for this. Someone will chime in. Also do a search on wheel ballancing. But my first step would be check torque on all the suspension components to make sure.
But also you said when you switch frt to back the problem changed-"follow that"-if you have a good spare swap with one of the tires that was on the frt when it shook the worst-then do the other one until you isolate the bad tire.-----Hey SIXFOOTER hows that parts installation coming along?
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Almost ready to get on it. Still need to hook up compressor so I can run the new sandblast cabinet. First step is get all the cabinet projects out of the garage, thats happening this week. By Sat I expect to roll the vette in and start removing the front clip. Then roll it back in the driveway for a serious de-greasing and then pull it apart. Lots of pics will follow. I have about 300 lbs of parts all piled up on the bench and laid in a supply of Corona, ready to get on it.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by bobs77vet
why don't you think its a wheel bearing?
Instructor
Joined: May 2006
Posts: 202
Likes: 16
Originally Posted by mdonohue@altergroup.
Never had this happen before, a very noticible shake occures in the front end between 50 and 65mph, and then again when slowing down from 70. smooth and straight before and after.
It's a 68 BB roadster, all new joints , bushings, steering box, front end alignment, new TA radials balanced 3 times so far. I've even put the rear tires on the front and it's not half as bad, but still noticeable.
235/70R15 rear 225/70R15 front. This shaking did not happen before the front end was overhauled. Thanks ahead of time for any help.
Gluntly
It's a 68 BB roadster, all new joints , bushings, steering box, front end alignment, new TA radials balanced 3 times so far. I've even put the rear tires on the front and it's not half as bad, but still noticeable.
235/70R15 rear 225/70R15 front. This shaking did not happen before the front end was overhauled. Thanks ahead of time for any help.
Gluntly
Either a balance or bad tire problem. Most likely a balance in that it is speed sensative.
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Instructor
Joined: Jan 2003
Posts: 237
Likes: 0
From: TAMPA FL
I also have TA radials and have a lot of trouble. 2 out of the 4 original tires I had balanced 3 times. It ended up 2 of the 4 were out of round and no amount of balancing will fiix this. After fighting with the seller for 2 weeks I got replacement tires. The set I have now I have balanced 2-3 times, they are not to bad now but I am still getting vibration between 75-80. I am not happy with these tires and will not buy again.
Dennis
Dennis
Racer
Joined: Apr 2005
Posts: 494
Likes: 0
From: Virginia
My first thought was bent wheel, had a similar problem with a wheel that was bent so slightly it wasn't visible. We just put Traction T/A's on my wife's Volvo, there is a vibration above 80 MPH that wasn't there before. Haven't gotten them rebalanced yet. Good luck.
Le Mans Master
Joined: Oct 2005
Posts: 9,429
Likes: 44
From: Macon, GA
Originally Posted by SIXFOOTER
I can't remember what the name of the machine that was recommended in here a couple months ago for this. Someone will chime in.
It puts a load up to 1400 pounds on the tire to simulate driving conditions. Works very well.
Intermediate
Joined: Apr 2006
Posts: 26
Likes: 0
From: Stamford CT
I was running Goodyears on my '73 and had a vibration that started about 55mph through 70mph. I had the car aligned, replaced the shocks, bought new Firestone tires, had rims trued, and replaced the idler arm. Everything helped a little, the problem went away altogether when I started playing with the tire pressure. I found that if I ran the tires a little below the usual 32 psi (but within manufacturers limits, I called Firestone to be sure) that the car handled better and did not vibrate at all. I'm running 29 psi in rear and 27 psi in front. I kept changing pressures and then test driving the car over the same fast lane of I-95. If your roads are like mine, don't do the test in the lanes the trucks use, even my family car has problems with the pavement there. Good luck, Bill
Racer
Joined: Jul 2004
Posts: 400
Likes: 1
From: California
Originally Posted by bobs77vet
why don't you think its a wheel bearing?
i bet its a wheel bearing, i have the same problem in my 72 super beetle, i didnt seat the race in the drum all the way and it shook the steearing wheel and all.
Thread Starter
Heel & Toe
Joined: Dec 2005
Posts: 17
Likes: 0
From: Island Lake Illinois
Got the shakes
Was the darn wheels guys, I picked up a set of mags on e-bay real cheap
on a whim (amazing) and had my TA's put on them, and smooth as glass.
Go figure, thanks again for all the info, I know I'll use some of it again sometime!!
on a whim (amazing) and had my TA's put on them, and smooth as glass.
Go figure, thanks again for all the info, I know I'll use some of it again sometime!!
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by mdonohue@altergroup.
Was the darn wheels guys, I picked up a set of mags on e-bay real cheap
on a whim (amazing) and had my TA's put on them, and smooth as glass.
Go figure, thanks again for all the info, I know I'll use some of it again sometime!!
on a whim (amazing) and had my TA's put on them, and smooth as glass.
Go figure, thanks again for all the info, I know I'll use some of it again sometime!!
