Had my driveshaft balanced, some new U joints installed and had the bushing in the tailshaft housing replaced as well. Just got it all back in the car and also put my lowering blocks back in because it was sitting a little high in back for my liking since I installed the new leafs. Didn't get a chance to take her out for a spin yet. Will do it tomorrow. Hopefully I have eradicated the gremlins that were causing my vibration issues. If not, a new set of axles and bearings will be the next purchase. I tried to find my original thread about it but I never can figure out the search function on here.
Definitely need a report back to hear about the improvements and if you could get us some new pics of the car it would be nice. Were you getting vibrations at high speeds? I am getting vibrations over 70mph and my mechanic told me to get the drive shaft balanced. Said it would be $100 for the balance and that I should get new u-joints at the same time. To the best of my knowledge mine is still all factory.
Yeah I was getting a vibration starting at 80 and getting worse the faster I went. Started getting real scary about 100. After that things inside the car really began to become a blur. This was a driveshaft that I had bought out of a wrecking yard back in the 80s when the other one actually got so bad it broke a U joint and flew out of the car. So I've been living with this for a long time. It was fine most of the time. I don't normally get it over 80 mph anyway but the trap speed was 101 before the winter work so probably abit more now. I'm hoping this will take care of it. We'll see tomorrow. A quick blast on a lonely road should tell me what I want to know.
Update---The driveshaft balance seems to have done the trick. YAY!!!! I drove it down to work on our club project on Sunday. I got a little heavy on the go pedal and ran it up to 102(according to my GPS ap) and it was smooth.Not even the hint of a vibe. Balance was only about $60. New Ujoints and a new bushing in the tailshaft and also had to replace the Yoke because it was all knurled up. All totaled it was about $200. Money well spent. I'm may be ready for a track run.
I have the same problem with the front vibration at around 60-80 mph. Replaced all bushings, balljoints and shock absorbers in front suspension. Vibration decreased around 70% but is still there at the same speed. I was wondering if maybe, the shaft is my culprit. So I took it to the freeway and ran it to about 85 mph then put the gear to neutral, vibration is still there at the same speed. So, I can conclude that the shaft is not causing the vibration, correct? Would the accell cause the car to vibrate when the vibration seems to be on the front? More follow up info: front vibrates but steering wheel is smooth (does not shake). Please assit. Thanks.
Balance is one thing but a slightly bent or out of round rim will cause that as well. It will still balance but might hop at speed. I had one rim that apparently was out of round and it bounced around at around 65-75mph. Even something like a bad wheel bearing will give a weird feel in the steering.
brake drums poorly made or out of balance will also cause vibration. Jack the car up and spin each wheel to make sure that it is running true. this will also show bent axel flanges. So Firebob, is the fresh engine all you had hoped?
Well...I can't say that it is as of yet. But then I have about 500 miles on it, all street time, and have really tried to strech it out yet so I guess I should reserve opinion until I get to. I will say it ran fantastic before and it runs well now. The changes I made should effectively move the power band higher in the RPM range( an area that I don't normally get into on the street). I like the difference between the headers and the LBs. It may take a track day for me to realize the difference. I still have to take it back to the dyno and that will give me some hint as well. It's funny but I didn't think I would miss the low end torq as much. At least I'll save on tires.
I have had a what I thought was an driveshaft vibration...... But it may be something else. Being a 67 it has the 2 traction bars and was wondering if it could be a driveline angle issue? Because with the car on the ground, the pinion angle doesn't look right. As far as driveshaft and axle appear to be factory to the car.
I was also starting to think about pinion angles not being right because my car has been dumped pretty good but i think they would have to be quite a ways off to cause a real vibration issue. I would bet that's not your issue. I never did get around checking the angles because you would almost have to have it sitting on the wheels on a lift to do it.
