It feels worse! The whole steering colum is moving. At 120mph I slung off a wheel weight while test driving, I heard a big BANG and thought my car was exploding! Needless to say I slowed down after that. I will be ordering new rotors (crossdrilled&slotted), maybe thats the vibration? Can the front end be misaligned to cause this vibration, when I let go of the wheel it goes straight? Any ideas?

Run a few cnrs hard?
Check for cracked rims.
Check every ball joint, bearing, mounting bolt

Obviously you have a major problem with the frame or suspension and should not be driving the car until you isolate the problem. I doubt it has anything to do with the Brake drums. Jack up the car, put some jackstands underneath the car and inspect the suspension by shaking the front end parts....tie rods, wheels, etc. Check the torque on all the bolts and make sure everything is tight. Check your steering linkage thoroughly.

One other thing that is really hard to check for is that you just MAY have a front tire that is starting to separate!

My neighbor had one on his F-150 P/U and it took him quite a while to figure out it was happening to the pass side tire AND it looked like a VERY good tire!!

pdq67

One thing about this post I feel is incorrect is that you think turning the drums will fix an out-of-balance problem, but it won't. Unless the brakes are 'pulsing' when you are applying them, then the turning will not fix anything. When a rotor or drum is turned, the metal is removed pretty uniformly from all around the difference so it should not make any difference. You need to have the drums and rotors put on a balanca machine and checked that way. The turning lathe will only check for out of round, not balance.

Beyond that, is the vibration constant over any speed or only at certain speeds? Have you had the driveshaft/u-joints balanced? How about the tires? Have you rotated the tires recently?

What about rims... are they good or cheaper ones? Have a buddy that had a rim that caused him very similiar problems until he finally got new rims, then suddenly his vibration was gone.

Anyway, until you get it figured out, I'd recommend keeping the 120MPH blasts to a minumum!

Good luck,
BC

BC is right
incorrect is that you think turning the drums will fix an out-of-balance problem,

One thing about this post I feel is incorrect is that you think turning the drums will fix an out-of-balance problem, but it won't. Unless the brakes are 'pulsing' when you are applying them, then the turning will not fix anything. When a rotor or drum is turned, the metal is removed pretty uniformly from all around the difference so it should not make any difference. You need to have the drums and rotors put on a balanca machine and checked that way. The turning lathe will only check for out of round, not balance.

Beyond that, is the vibration constant over any speed or only at certain speeds? Have you had the driveshaft/u-joints balanced? How about the tires? Have you rotated the tires recently?

What about rims... are they good or cheaper ones? Have a buddy that had a rim that caused him very similiar problems until he finally got new rims, then suddenly his vibration was gone.

Anyway, until you get it figured out, I'd recommend keeping the 120MPH blasts to a minumum!

Good luck,
BC
Tires and rims are new, nitto/ budnik, driveshaft new I watched the guy balance it. As for balancing the drums, no one around can do it. I will take to an alignment shop and have them check the whole front end.
The vibration comes in at 80mph, and is still there the faster I go? I hope I get it right before I run out of $$$.

Take into consideration your life first.....property damage second. You can not put a dollar amount on that. :thumbsup:

Tires and rims are new,
Means nothing...espec tyres
A tyre can be separated without any noticable visual symtoms...they show up later as a buldge. It will balance fine. Its when the weight of the car is on it, as it turns the side collaspes at 1 piont causing a vibration.
Rims can balance, but at aparticular speed get a harmonic effect.
1/Do u have sloted holes in the rims?
if so center the rims with tappered nuts tightening each slowly so the are 'knicked up' then remove each 1 by one replacing with the correct nuts.
2/Do u have paint on the drums where the rim touches them?
Scrape these areas clean.
3/Are the rims touching the drum balancing weights?
Removing a couple 1/1000" off one cnr of the weight will not effect balance, to clear the rim
I had ALL of these on my new Cragars last Nov. Fortunatly I have a young son who works in a GOOD tyre/wheel alignment shop...even they didnt know these...it was a manager from another branch (also a 70 camaro owner) who stepped in pionted these out....This would not have happened if my Son did not know who or where to go for advanced advice.

Take into consideration your life first.....property damage second. You can not put a dollar amount on that
Unfortunately this is something ppl realise, but untill they have been personally effected dont realy put in place fully until its too late.
I smashed my spine yrs ago because someone didnt take Daves concept seriously as they should...ended up with no legs...have them back now, but still with limitting factors...
PS dont think "limitting" means "cant do" that BS its can do just do it diff or takes longer. I dont have much time for many 'disabled' ppl..full of excuses.

what you are describing is a probable wheel balance issue. Warped rotors/out of round drums will shake under braking only in most cases. driveline issues will generally shake at slower speeds and on decels or accel. Wheel aligment issues will not give you a shake, a pull yes, but not a shake, and a front end part would have to be very very bad to cause a shake.... check for a bad tire or wheel balance and go from there. Any other problems should show up long before 80 mph.

Check your ball joints, A- arm bushings, and the bolts where the A-arms connect to the frame. (Mostly the A-arm bushings)

Jack

Here's a PDF file document that's dedicated to finding annoying Camaro vibrations. This may help. It has lots of good ideas and places to look.

http://www.csgbenefits.org/camarovibration.pdf

But certainly do as stated above. Check all front end parts VERY carefully, and keep checking until you find/fix it.

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