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Thoughts on cause of vibration?


TTQ B4U

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2007 Entourage Minivan with 68k on it.

 

Thought initially it was wheel balance but have had it balanced twice and still no go. Don't drive it often but today I noticed this:

 

Steering wheel will seem to "wobble" at 45mph on smooth roads around town. On the highway cruising at 75mph there are stretches where it's smooth as can be then it will begin to vibrate like it's way out of balance, and again, cruise smoothly at times.

 

What are your thoughts on cause?

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Sounds like wheels or tires to me, just because they balance doesn't mean they have good runout specs or roadforce. (although I will admit that a vibration caused only at certain speeds is typically a balance issue) They should be rotated front to the back and re-driven to see if the shimmy moves from the steering wheel. After the wheels and tires are properly ruled out as the issue should you consider something else as the cause. I would also consider trying different gears and loads on the drivetrain to see if the vibration is effected at those speeds, this would help narrow it down.
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2007 Entourage Minivan with 68k on it.

 

Thought initially it was wheel balance but have had it balanced twice and still no go. Don't drive it often but today I noticed this:

 

Steering wheel will seem to "wobble" at 45mph on smooth roads around town. On the highway cruising at 75mph there are stretches where it's smooth as can be then it will begin to vibrate like it's way out of balance, and again, cruise smoothly at times.

 

What are your thoughts on cause?

wheel balance or road forced? text me tomorrow if youre interested in getting them on the road force

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have the balanced checked on a road force balancer, here's a service bulletin for your car.

 

Hyundai Technical Service Bulletin 06-50-013 TIRE AND WHEEL VIBRATION AND RADIAL FORCE VARIATION.

THIS BULLETIN SUPERSEDES TSB# 01-50-008 TO INCLUDE ADDITIONAL

INFORMATION.

NOTE: Each wheel and tire assembly is precision balanced and force match

mounted before the vehicle leaves the assembly line. Dealers should not

alter the dynamic balance of any wheel unless a customer describes

experiencing a tire/wheel vibration condition.

DESCRIPTION:

A customer may describe a steering wheel vibration or "shimmy" condition in the

vehicle. Sources of vibration/shimmy may be from the following conditions:

1. Wheel and tire assembly out of balance

2. Wheel out of round

3. Tire assembly stiffness variation (Radial Force Variation or RFV)

RFV (Radial Force Variation) may be defined as the amount of change in stiffness of

the sidewall and footprint when a load is placed against a tire.

Wheel and tire assembly imbalance should be addressed first because it is the most

common cause of vibration. A well maintained off-vehicle, two-plane dynamic wheel

balancer can accurately correct this condition.

If a vibration or shimmy is still present after an imbalance condition is corrected, any

out-of-round condition of the wheel and force variation of the tire must be addressed.

NOTE: All of the above conditions may be addressed at the same time if

equipment is available such as the Hunter GSP 9700, which is a two-plane

wheel balancer.

Page 2 of 4

For proper diagnosis, it is important that the wheel and tire assembly first be

confirmed and corrected for wheel run-out and tire assembly stiffness variations

that may cause vibrations before replacing any component(s) on the vehicle.

COMMENT:

To correct vehicle vibrations caused by wheel out-of-round and tire stiffness variations,

access to a Hunter GSP 9700 or equivalent wheel balancing machine is necessary. If

you do not have access to such equipment, it may be located through the Hunter

website (http://www.gsp9700.com).

For information about the purchase of a Hunter GSP 9700 and Hyundai’s special

pricing, please visit website (http://spx.com).

Page 3 of 4

Technical Service

Bulletin

Group

Number

Follow the machine manufacturer's procedure to measure and correct wheel and tire

assembly RFV related vehicle vibrations.

The following assembly RFV may be used as guide:

• P-Metric passenger vehicle wheel and tire assemblies = 18 ~20 lbs or less

• P-Metric SUV and Van wheel and tire assemblies = 24 ~27 lbs or less

NOTE: This information is a guideline, and the RFV range accounts for machine

variability.

CHASSIS

06-50-013

Page 4 of 4

If force match mounting the wheel and tire assembly to the above guideline cannot be

achieved, it may be necessary to replace a wheel or tire or both to correct the vibration

condition (see note below before replacing any part). Since tires can sometimes

become temporarily flat-spotted, the RFV should be measured immediately after

the vehicle is driven at least 10 miles. (If the RFV cannot be measured immediately

after the vehicle has been driven at least 10 miles, elevate the vehicle on a hoist to

stop the tires from flat-spotting). Tire pressure must also be adjusted to the

recommended pressure shown on the driver's door or B-Pillar.

NOTE: If the vehicle vibration condition cannot be improved to an acceptable

level using the above procedure or a tire or wheel is required to be

replaced to correct this condition, contact the Hyundai Technical

Assistance line at (800) 325-6604.

REQUEST TO CALLING TECHNICIAN:

The dealer technician must provide the following information to the Technical

Assistance Line:

1. Condition or customer description

2. VIN

3. Mileage

4. Tire size

5. Tire manufacturer

6. Tire condition

7. Wheel - alloy or steel

8. Imbalance values (inside and outside)

9. 1st and 2nd order RFV values in lbs

10. Wheel run-out values (radial and axial)

11. Location of the wheel on vehicle (RF, LF, RR, LR)

NOTE: Printed copy of any of the above information will be appreciated.

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Sounds like wheels or tires to me, just because they balance doesn't mean they have good runout specs or roadforce. (although I will admit that a vibration caused only at certain speeds is typically a balance issue) They should be rotated front to the back and re-driven to see if the shimmy moves from the steering wheel. After the wheels and tires are properly ruled out as the issue should you consider something else as the cause. I would also consider trying different gears and loads on the drivetrain to see if the vibration is effected at those speeds, this would help narrow it down.

 

 

^^ what he said.. Most places that "balance them" will throw whatever weights it calls for. Just because it zero's out does not mean its balanced. Road force them and rotate to back.

 

Also check tread on front tires and make sure it is wearing even.

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  • 1 month later...
Mother has the exact same van and had the same problem right around your mileage as well...

 

Update.....tie rod need replaced. doing both and getting an alignment.

 

Taking the race van to IPS for the above and a couple of other items. Nearly 1/2 the price of what the dealer cost is.

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