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Shaking Excursion....but the tires are balanced?

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Shaking Excursion....but the tires are balanced?

Old 04-11-2007, 07:40 AM
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Default Shaking Excursion....but the tires are balanced?

I recently detected what I thought were out of balanced tires on my Ex. I had the tires balanced and the shaking continues. It isn't noticeable at low speeds but at highway speeds it becomes very irritating. What are the likely culprits? Bearings? The truck has 84,000 miles on it.
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Old 04-11-2007, 07:51 AM
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Default Re: Shaking Excursion....but the tires are balanced?

4 or 2 wheel drive?
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Old 04-11-2007, 07:56 AM
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Default Re: Shaking Excursion....but the tires are balanced?

What year? 2 or 4 whl drive. Ever replace the shocks? Did an 18 yr old at a Tire Kingdom do the dynamic/static wheel balance? Doubtful it is the bearings. Any bearing worn out enough to cause a problem will be audible, and quite dangerous. Likely cause is either the shocks, knuckle or steering linkage. Heavy trucks put suspension and steering components to the test...most heavy trucks require front end rebuilds near 100k. Average cost 3k.
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Old 04-11-2007, 08:03 AM
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Default Re: Shaking Excursion....but the tires are balanced?

I've had to put one of these on all F350/250 I've owned. Brings em back to driving like new.

http://www.autoanything.com/suspensi...tabilizer.aspx

You can get one cheaper than those and will do the same job.
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Old 04-11-2007, 08:04 AM
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Default Re: Shaking Excursion....but the tires are balanced?

Ludicrous - 4/11/2007 7:56 AM

What year? 2 or 4 whl drive. Ever replace the shocks? Did an 18 yr old at a Tire Kingdom do the dynamic/static wheel balance? Doubtful it is the bearings. Any bearing worn out enough to cause a problem will be audible, and quite dangerous. Likely cause is either the shocks, knuckle or steering linkage. Heavy trucks put suspension and steering components to the test...most heavy trucks require front end rebuilds near 100k. Average cost 3k.
2 wheel drive. The tire guy did both a static and dynamic balancing....he even indexed one of the tires due to the large amount of weigh the first spin indicated. I have only towed my 23 ft boat once with this truck and most of the mileage has come from highway travel. The ride is still just as stiff as the day I bought it. Ford suggested having the tires balanced while still attached to the truck. Is that the next step to try to isolate the problem?
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Old 04-11-2007, 08:12 AM
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Default Re: Shaking Excursion....but the tires are balanced?

This will sound a little odd but check the disk brake rotors for being warped. If you had the tires rotated and some ham fisted monkey didn't use a torque stick when he re-mounted the tires he'll warp a rotor in a heartbeat...... And yes, you can ask how I know...
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Old 04-11-2007, 08:18 AM
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Default RE: Shaking Excursion....but the tires are balanced?

Bug....I will look into those shocks. I have the standard 15 inch wheels that came with the 2002 model.

Bailey....I had the front rotors and brakes replaced last week .... the shaking was happening before they made that repair.
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Old 04-11-2007, 08:20 AM
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Default Re: Shaking Excursion....but the tires are balanced?

We had a 2000 and it was a pain in the arse to get balanced. I guess cause it weighs 4 tons
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Old 04-11-2007, 08:24 AM
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Default Re: Shaking Excursion....but the tires are balanced?

Tireless, it's a steering stabilizer, not a shock. It will stop the vibration. Been there, done that.
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Old 04-11-2007, 08:30 AM
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Default Re: Shaking Excursion....but the tires are balanced?

Bugbuster - 4/11/2007 8:24 AM

Tireless, it's a steering stabilizer, not a shock. It will stop the vibration. Been there, done that.

Hey, they look like friggin shocks to me.
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Old 04-11-2007, 08:33 AM
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Default Re: Shaking Excursion....but the tires are balanced?

Yeah, I keep forgettin your a city slicker.
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Old 04-11-2007, 08:41 AM
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Default Re: Shaking Excursion....but the tires are balanced?

trapit - 4/11/2007 8:20 AM

We had a 2000 and it was a pain in the arse to get balanced. I guess cause it weighs 4 tons
The thing is the ride has been fine until now....something must be "all worn out".....that is a technical city slicker observation for the benefit of bug.
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Old 04-11-2007, 09:05 AM
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Default Re: Shaking Excursion....but the tires are balanced?

how old are the tires?

Maybe a broken belt within the tire(s)?
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Old 04-11-2007, 09:12 AM
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Default Re: Shaking Excursion....but the tires are balanced?

bailey is right checkl the disc brakes... if they are even slighty warped you will feel a vibration... Does it happen more when you brake from higway speeds? or a consistent vibration??
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Old 04-11-2007, 09:23 AM
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Default Re: Shaking Excursion....but the tires are balanced?

My guess would be either a tire out-of-round or worn suspension.

Have the tires "road force" balanced...Tire Kingdoms in my area don't have this capability but Goodyear Gemini does. Had the same problem on a Tahoe...tire kingdom rebalanced again and again to no avail. One road force balance and it was fixed. Note though, if the tires are badly out of round road force can not correct the problem.

Without road force balancing indexing or rotating tire on the rim is only a best guess. They break the bead and rotate 180 degrees, respin. If that doesn't work they repeat and rotate 90 deg...so on. Road force can help more accurately determine the correct orientation of the tire on the rim.

I worked at a tire jockey at National Tire Warehouse in high school, not an expert by any means but I am very very particular about proper balance on my tires.

Would also check the suspension, especially shocks and steering stabilizer. OEM units are usually way past the end of their life at 84k. Bad shocks can make minor imperfections in the road seem just like the problems you are describing.
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Old 04-11-2007, 11:14 AM
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Default RE: Shaking Excursion....but the tires are balanced?

10,000 to 15,000 miles on the Michelin tires.

The rotors are one week old, this repair eliminated the shaking I got when braking at highway speeds due to old warped rotors.

What is "road force" balancing?
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Old 04-11-2007, 11:44 AM
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Default RE: Shaking Excursion....but the tires are balanced?

I agree the tires could be out of round. Road force balancing is checking the balance with pressure applied to the tires.

You can't balance an out of round tire to the point it will not vibrate, it will have to be trued which means shaving it down to being round again if it's not too far out of whack.
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Old 04-11-2007, 12:02 PM
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Default Re: Shaking Excursion....but the tires are balanced?

Trayder - 4/10/2007 9:05 PM

how old are the tires?

Maybe a broken belt within the tire(s)?
BINGO! Broken or separating!
But from my experience age of a tire really doesn't come into play, but it can.

The early stages of a belt letting go chances are you will not hear the sound of a tire flapping on the black top as you go down the road, but later on you will. I'd go over to a tire shop and have them depth gauge your tires, I'd be checking your tires at no less then 6 or 7 spots around the tire.

Is the vibration felt in the steering wheel (front tires) or in the seat of your pants or dash board (rear tires)?

Yes the vibration damper is worth every penny they cost you and definitely could solve your problem IF your problem is front end related. IMPO the factory specs for setting up a front end has far to much toe-in for my liking......if one of your tie-rod ends are a little worn it could be causing wheel flutter/ shaking.
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Old 04-11-2007, 03:49 PM
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Default Re: Shaking Excursion....but the tires are balanced?

TX Garrett

I had the exact symptoms Tireless is having about a year ago and after having the wheels balanced nothing changed. My local Mechanic found broken belts in 3 tires soon thereafter.

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Old 04-11-2007, 04:36 PM
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Default Re: Shaking Excursion....but the tires are balanced?

Can you isolate to the front or rear of the vehicle? Front tire shake will be predominantly felt in the steering wheel, rear tire will be felt more in your, uh...seat.
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