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-   -   Vibration from 58 to 68 mph. (http://www.camaro5.com/forums/showthread.php?t=89118)

Basenji 06-12-2010 01:43 PM

Vibration from 58 to 68 mph.
 
Vibration from 58-68.
I believe my Camaro has this issue (see below) and GM is saying this is a normal condition of all Camaros. The tires have been balanced and rechecked. I would appreciate knowing if your Camaro does or does not have this issue please.

__________________________________________________ ______
#PIE0058: EI10067 - Engineering Information - Shake/Vibration in Steering Wheel/Body or Seat of Vehicle While Driving at Highway Speeds on Smooth Roads - (Mar 19, 2010)


http://gsi.xw.gm.com/image_en_us/gif.../999999995.gif
Subject:EI10067 -- Engineering Information -- Shake/Vibration in Steering Wheel/Body or Seat of Vehicle While Driving at Highway Speeds on Smooth Roads

Models:2010 Chevrolet Camaro


Attention: Proceed with this PI ONLY if the customer has commented about this concern AND the EI number is listed in GMVIS. If the customer has not commented about this condition or the EI does not show in GMVIS, disregard the PI and proceed with diagnostics found in published service information. THIS IS NOT A RECALL -- refer to Service Bulletin 04-00-89-053C for more details on the use of Engineering Information PIs.

<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=2421444&from=bcpi#ss1-2421444">Condition

Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this PI.
Some customers may comment on shaking/vibration feeling while driving at highway speeds (typically between 55-70 mph (88-112 km/h)) on smooth roads.
Vibrations in the steering wheel may also be accompanied by vibration in the body and/or seat but may be more obvious to the driver due to contact with the steering wheel. When the steering wheel is held loosely on smooth roads, driving straight ahead, slight steering wheel oscillation may be visible.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=2421444&from=bcpi#ss2-2421444">Cause

GM Engineering is attempting to determine the root cause of the vibration. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=2421444&from=bcpi#ss3-2421444">Instructions

Road Testing

In order to provide the best diagnostic information, a road test with an EVA (Electronic Vibration Analyzer) or equivalent should be conducted. Convenient locations for the magnetic transducer are the steering column, the driver front seat track and the trunk floor pan over the rear of the propshaft. If possible, you should record your readings in each location between 50-70 mph (80-112 km/h).
Important: If the vehicle has been sitting for an extended period of time, you should drive the vehicle for at least 10 miles (16 km) to remove any tire flat-spotting.
Important: Be sure tire pressure is set to the placard values.
• Visually inspect the tires and the wheels. Inspect for evidence of the following conditions:

• Missing balance weights
• Bent rim flange
• Irregular tire wear
• Incomplete bead seating
• Tire irregularities (including pressure settings)
• Mud/ice build-up in wheel
• Stones in the tire tread
• Verify that aftermarket wheels and/or tires are not in use.
• Road test the vehicle using the EVA essential tool while driving for a sufficient distance on a known, smooth road surface to duplicate the condition. Determine if the vehicle is sensitive to brake apply. If the brakes are applied lightly and the pulsation felt in the steering wheel increases, discontinue this EI and refer to the Brakes section of SI that deals with brake-induced pulsation.

• Next, record the Hertz (Hz) reading as displayed by the EVA. This should be done after a tire break-in period of at least 10 miles (16 km) at 45 mph (72 km/h) or greater, in order to eliminate any possible tire flat-spotting. This reading confirms what the vehicle vibration frequency is prior to vehicle service and documents the amount of improvement occurring as the result of the various steps taken to repair. If the EVA indicates a 45-55 Hz propshaft vibration, discontinue this EI and follow normal diagnostics in SI for driveline vibrations.

• If the vibration smooths out during the road test, tire flat-spotting is the cause. Provide the explanation to the customer. The vibration is due to the vehicle being parked for long periods of time and that it's the nature of the tire to take a set. You may find additional information by referring to Corporate Bulletin Number 03-03-10-007E: Information on Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires.
If the vibration source is determined to be the tire/wheel assemblies, perform the following:Wheel and Tire Assembly Balance & Road Force Variation Check
  1. <LI type=1>Measure the assembly balance, radial force variation and radial runout. Do not match mount or rebalance the assemblies at this time. Record the values for each assembly and the wheel position. Note: If a runout/balancing machine is used, record radial runout of the tire/wheel assemblies. If one or more of the tire/wheel assemblies are more than.040 in (0.10 cm), this could be a source of vibration. Readings of.030 in (0.08 cm) or less are preferable for sensitive customers.

    http://www.camaro5.com/forums/images.../wol_error.gifThis image has been resized. Click this bar to view the full image. The original image is sized 1355x1221 and weights 18KB. http://www.camaro5.com/forums/images.../wol_error.gifThis image has been resized. Click this bar to view the full image. The original image is sized 1355x1221 and weights 18KB.http://gsi.xw.gm.com/image_en_us/gif...78/1878352.gif
    http://gsi.xw.gm.com/si/images/tif.gif
  2. Confirm the wheel hubs are clean and corrosion free - correct if required. Re-mount the tire/wheel assemblies and ensure that the wheels are as perfectly centered on the hub as possible. Tighten all nuts first by hand, observing the recommended "star" pattern. Be certain the wheel remains perfectly centered. Fully tighten the nuts using a torque wrench, NOT a torque stick again in the "star" pattern to 190 N·m (140 lb ft).
Important: When performing the second road test, it is not necessary to drive an extended distance to remove flat spotting of the tires.
Once again road test the vehicle and record the EVA values. Note if there was not an improvement in the vibration concern. Contact the engineer below with your collected data. The engineer will advise the proper corrective action at that time.

PQ 06-12-2010 01:49 PM

Mine does. :laugh:

But of course I have messed up after market wheels on it. :rolleyes:

But, when I had the 21" wheels on it, there was NEVER any vibration.

lee 06-12-2010 01:55 PM

i have no vibration

Basenji 06-12-2010 01:58 PM

No modifications have been made to my Camaro.

bkscott 06-12-2010 03:15 PM

Funny, I noticed a slight shimmy in my steering wheel, but could not feel any real vibration when driving. I recently upgraded to 20 X 9's in front and it got worse. I had the wheels rebalanced and 98 percent of it went away.

I can still see it sometime, but for I cannot feel it when I hold the wheel. I also know it took alot of weights to balance the wheels.

Brownhornitt 06-12-2010 03:22 PM

See my thread about the grooves in the road...

http://www.camaro5.com/forums/showth...reeway+swaying

Texhawk 06-12-2010 03:29 PM

As pointed out in the service bulletin, the tires can be balanced, but the tire/wheel assembly may have a high or low spot that only shows up under load testing of the assembly. The wheel may have a slight high point and the tire may have a high point, that if they are not offset by the way the tire is mounted, could cause a vibration.

Could just be a bad set of tires.

06blownSS 06-12-2010 03:34 PM

mine does as well but again...aftermarket wheels

Ronn 06-12-2010 09:02 PM

mine doesn't have a vibration

skuttduck 06-12-2010 09:24 PM

Mine did that a bit when I had the pirelli scorpion ice and snow tires on there. The dealer re-balanced the tires and it was a lot better. I haven't really noticed it on the summer P zeros.

PQ 06-12-2010 10:21 PM

Quote:

Originally Posted by Texhawk (Post 1976423)
As pointed out in the service bulletin, the tires can be balanced, but the tire/wheel assembly may have a high or low spot that only shows up under load testing of the assembly. The wheel may have a slight high point and the tire may have a high point, that if they are not offset by the way the tire is mounted, could cause a vibration.

Could just be a bad set of tires.

And how do you test for that?

Camaro Kid 06-12-2010 10:27 PM

I also have this problem. Going on a long road trip this week will have to see if it goes away after a while of driving. Funny because my 98 SS was as smooth as glass at 140mph.

Boosted IBM 06-12-2010 11:24 PM

I have this I ****ing hate the car at these speeds due to it. At 85mph its really bad

Basenji 06-13-2010 12:34 AM

The runout on each of the tires is much lower than GM's specs. The balance and runout were verified by another tire company.

Wayner2k2 06-13-2010 11:05 AM

Quote:

Originally Posted by Texhawk (Post 1976423)
As pointed out in the service bulletin, the tires can be balanced, but the tire/wheel assembly may have a high or low spot that only shows up under load testing of the assembly. The wheel may have a slight high point and the tire may have a high point, that if they are not offset by the way the tire is mounted, could cause a vibration.

Could just be a bad set of tires.

Thank God for the service bulletin! It’s called a tire hop. Took it to two dealerships, explained what and how to fix it. Their response was a blank stare. @(*$%^& Idiots! The bad part is the second dealer trip was AFTER the service bulletin was released. I'll stop my comments there. However, I'm going to call the local Caddy dealership to have it looked at this time. Fingers crossed I'll come back with a smooth drive.

tradosaurus 06-13-2010 11:28 AM

I had this vibration issue on a set of new tires for a different car a few years back. After Discount Tire performed a special balancing (match mounting?) of the tire they finally decided to replace the tires.

After that the car road fine.

But good luck getting your tires replaced on a new car.



"WHEEL & TIRE RUNOUT VIBRATIONS

Sometime wheels will still shake and vibrate even after they have been balanced. The problem is often excessive wheel runout or tire runout. Most tires should have less than .030 to .050 inch of runout. An out-of-round tire can produce harmonic vibrations that come and go at various speeds depending on how many "humps" are in the tire.

As a rule, most steel rims should have less than .050 inch of runout, or .040 inch of runout if the rims are aluminum alloy. Some trucks and SUVs can tolerate up to .060 inch of radial and lateral runout, but others can't handle any more than .030 inch of runout before vibrations become noticeable.

Runout problems can often be corrected by "match mounting" the tire on the wheel (rotating the tire so the tire high spot is over the rim low spot). "

http://www.aa1car.com/library/wheel_balancing.htm

deibelsan 06-13-2010 05:22 PM

No problems at all. In fact, mine is so smooth that I accelerate through 70mph and on to over 80mph sometimes without even realizing it. Definitely cool but a little scary how quick and easy the car gets up there without making a whimper.


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