67 GTX

If the drums become out of round, would that throw the tire slightly out of balance?

If they are out of round, then isn't their weight unevenly divided out over the entire drum?

John Van

wow 67,you must be really bored! But since you asked,I doubt if you would ever notice,since the drum being only 10-11 inch in diameter is so close to the center of rotation, would have little effect over the entire wheel balance. Just my .02 worth!

TVLynn

the only time you would notice would be when you step on the brakes

67 GTX

Well then, what would be responsible for a slight slight wobble in the tires? The rims and tires were all balanced from Summit.

The only reason I think that the drum being out of round would cause this is because, if not, then that means that my rear axles are slightly bent and the race around the front hub is also wornout on both sides. Both seem very unlikely to me, since both always seemed to have more than moderate lubrication.

The rear axle berings are new, so that rules them out. And the front wheel berings were in good shape.

Silverick

Last October, I bought a complete new set of white wall tires (Cooper) for my Fury from Big O and I could feel a little wobble, at times. A few months later, I bought a set of Magnum 500s and had these new tires installed on the new/old wheels. I took it on the freeway and the car wouldn't stay on the road!! Wobbled, bounced, wandered, etc.... So, I took it back to Big O and told them that I wanted each one of these tires rebalanced.... and I wanted to watch each tire as it spun on the machine. I'm glad that I did as all four tires were out of round! One of them was pretty good but, I drove out of there with a brand new, full set, of Hankook whitewall tires. Now the car drives like a dream!

67 GTX

I hope it is not the tires.

Well then, what about this:

Before I re-did the front suspension, the front tires pointed in. All the bushings were worn out. Now, that gave the old tires (they have since been removed) an un-even wear pattern. Now when I spun them, you could definetly see they did not spin straight.

Would un-even wear on a tire cause the tire to wobble?

440roadrunner

1. Just because someone "balanced" your tires and wheels does not mean that they are true, or balanced

2. Balanced does not mean true, and true does not mean balanced

I would find someone with a spin balancer and PAY them if need be to "go a little extra" to check true and balanced

Don't assume that your rear axles are bent until you have exhausted the above possibilities

I've literally turned thousands of drums and rotors (I spent 15 years in parts) and LOTS of drums / rotors are untrue castings. The best you can hope is that they were balanced properly to start with. You would DEFINATELY know an out -of- round drum, your pedal would pulsate up/ down badly.

67 GTX

It doesn't seem to do that. I will have the drums cut when I get the chance; if anything, it can't hurt to have a fresh new surface to work with.

I hope that solves the issue. I want to take the car to a track in a few weeks, so I am hoping that I can solve this issue before then.

If not, it is not the worst thing in the world. Thousands of miles have been put on the car in this condition.

scotts74birds

Would un-even wear on a tire cause the tire to wobble?

Duh, YES!

67 GTX

That's what I thought.
But since the tires and rims have been replaced, that removes them from the equation.

440roadrunner

'S what I tried to tell you earlier. Do NOT make assumptions. New tires can have problems (tread separation, etc) and just because someone SAYS they are balanced don't assume so, AND

Don't assume that new wheels are true, either.

67 GTX

Gotcha. I think that this will also have to be done. I never liked the idea of buying something balanced in the first place.
Thanks for responding.