Vibration help - moved from Hurst thread
Thread Starter
Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
Vibration help - moved from Hurst thread
I have the same problem with a vibration?? I too have had all shafts balanced as well as rear end new brgs evrywhere whls and tires balanced. To no avail. When you lean on car. she will shudder from the rear. I have no idea where it comes from. Tulsa driveline specialist has checked it and rechecked it. You can put car on stands in the rear and unload suspension. Vibration is not there but the angle of car does not change as when you have car on ground under load??
The angles I referred to are at either end of the driveshaft, which means the angles don't change depending on the incline of the car, since the trans and the dif are bolted to the frame.
Has the shop checked for matching driveshaft angles in the 1° to 3° range? Have they checked for cracked engine mounts? At what rpm does the vibration occur? In what gear? At what speed?
Racer
Joined: Mar 2007
Posts: 474
Likes: 0
From: Tulsa OKlahoma
whls hanging
First I did have stands under car to support both rear axles.
The axles were not hanging as you say. I m not saying what I did was good idea. NO they did not check the angles of driveshaft and rear in the one to three range. Yes mounts are good. If you throttle it in any gear when the nose comes up on car.You can feel it in the car.
The car has a 4.10 it will run down the highway wo a problem other than rpm. But from dead stop when you move out and under hard throttle. You can feel it in any gear.I wish I could explain it better.
The axles were not hanging as you say. I m not saying what I did was good idea. NO they did not check the angles of driveshaft and rear in the one to three range. Yes mounts are good. If you throttle it in any gear when the nose comes up on car.You can feel it in the car.
The car has a 4.10 it will run down the highway wo a problem other than rpm. But from dead stop when you move out and under hard throttle. You can feel it in any gear.I wish I could explain it better.
Racer
Joined: Mar 2007
Posts: 474
Likes: 0
From: Tulsa OKlahoma
vibration
The car will run down the road fine at most any rpm
When you stand on it is when you feel it
In any gear, I am at a loss Most of the problems I describe
With my car?? No one else has or does not care to answer
I think I may be the only one with such problems.
Thread Starter
Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
IMO vibration under acceleration is normally electrical (ignition) malfunction - bad wire, plug, cap, timing, coil - check in that order.
PS Lots of people have had the problem.
PS Lots of people have had the problem.
Last edited by magicv8; May 21, 2007 at 11:28 PM. Reason: ps
Le Mans Master
Joined: Feb 2006
Posts: 6,048
Likes: 5
From: "cutesy" TN
Drag racers used to put weaker springs in to get the car to transfer weight.
If your car tries to lift the wheels when you stomp it, you have weak springs. Have you tried to lift the car by hand?
If your car tries to lift the wheels when you stomp it, you have weak springs. Have you tried to lift the car by hand?
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Racer
Joined: Mar 2007
Posts: 474
Likes: 0
From: Tulsa OKlahoma
biscuit
I have replaced the for want of a better term the biscuit between the nose of rear and frame upper and lower. I bought mine from Mid America
My old one had chatter marks on the steel sleeve where it had been working I was elated . But that did not fix it. The one I bought was the black one. I dont remember anything special about it though. As of late I replaced the bolt making sure the diameter fit sleeve. No help. The problem seems to be in the rear of car motor does not skip a beat or misfire. She runs well. I always thought the transfer of weight had more to do with car having 4.10 gears than weak springs?? Suspension is fresh.
My old one had chatter marks on the steel sleeve where it had been working I was elated . But that did not fix it. The one I bought was the black one. I dont remember anything special about it though. As of late I replaced the bolt making sure the diameter fit sleeve. No help. The problem seems to be in the rear of car motor does not skip a beat or misfire. She runs well. I always thought the transfer of weight had more to do with car having 4.10 gears than weak springs?? Suspension is fresh.