here's my problem, I have bad vibration when I get the car up to 70mph at a steady. when speed is reduced to about 50 or so vibration reduces. I just changed out my harmonic balancer which I thought was the problem but vibration is still continuing. What else might be causing the vibration?:confused:
Could be a wheel out of balance /bent, drive shaft out of balance/bent, U joints, various steering components, various suspension components. First thing I would do is jack up the front end and look and feel for any play in the front end. I highly doubt your car has a Boss 302 engine.
Your proable right about it not being boss 302 but that's what it says on the side of the car and my father-in-law that left us the car when he died didn't tell us or leave us any papers saying what it truly is. So I go off what is on the car else there is a way you can tell by looking at the engine( I'm not very good at that). Thanks for suggestion.
I would jack the car up and put the rear on jack stands. Then run the car up to highway speeds and see if the vibration is still there. If it is, then you have eliminated a bunch of things that it could have been. Mainly, the front end. Next run it up again and kick the engine in neutral. If the vibration dissapears, then its in the motor. If not, its still in the drivetrain. Next remove the rear tires and and put the lug nuts back on to keep the drums in place. Run it up again. If it is still there, most likely it would be the drive shaft or an axle. It is pretty easy to check them for straightness but balance is something you will have to pay to find out.
also, try finding where in the car the vibration is more noticeable. if it is more in the dash or steering wheel, if it is more in the back seats, if it is more down on the floor inbetween the front seats or near the back seat. little details can help us help you greatly.
If you do the "jack up the rear and run it" be VERY careful. Not just because of the danger of the rotating tires, but if you stomp on the brakes when the wheels are spinning that fast, it will shear off the lug nuts and the wheel(s) will take off without you. There is an argument on here about this, but here goes....It is likely the transmission mount at the rear, but you might lose the vibration if you disconnect the driveshaft, spin it 180 degrees, or roll the wheels so the yoke spins half way around, and bolt it back on. For some reason (I won't say the word "phase", 'cause it reignites the argument ) this makes the vibration go away. This is quick and easier/cheaper than the transmission mounts, and figured you should do the cheap things first...
You already said that!!! (See, an argument is already started ) But seriously, most of our old cars have worn tranny mounts, but just for experimentation, see if the rotation of the shaft works. Then, when you find that 80% of the vibration is gone, swap out the mount.
The rubber mount is a $10.00 part, it's in bad shape, change it,.chezzz!, come on now just do it, and be done with it!
$10??? Really? Why haven't I changed mine, then? I keep messing around and not changing it, because I thought it would be $50-60! Is that an O'Reilly/AutoZone part, or Ford Dealer? Still, this is a good opportunity for a quasi-scientific experiment on the (phase) shaft issue.
$19.99 at Auto Zone $8.88 at Advance Auto, although I wonder what they mean by "solid"? $7.99 at O'Reilly
Jaime: Thanks for the input, I was real close on the price. The rubber mount is a $10.00 part, it's in bad shape, change it,.chezzz!, come on now just do it, and be done with it! __________________ "Clone or Die"
