'01 Grand Am Shudders at speeds above 60

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'01 Grand Am Shudders at speeds above 60

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Pontiac >> Current Pontiac Cars >> Grand Am >> Front Wheel Drive Models >> '01 Grand Am Shudders at speeds above 60

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'01 Grand Am Shudders at speeds above 60 - 11/29/2007 9:59:22 AM

jsquared60

Posts: 2
Joined: 11/12/2007
Status: offline

Has anyone experienced this difficulty with a Grand AM. This vehicle has 86K miles. We have had all tires replaced balanced, alignment twice and control arms/bushings replaced. Our local Pontiac dealer cannot seem to diagnose why this vehicle shudders terribly above 60mph. Could it be the engine mounts or transmission? The dealer we went to has ruled out the suspension. Help!

Post #: 1

RE: '01 Grand Am Shudders at speeds above 60 - 2/17/2008 10:43:28 AM

daisybop23

Posts: 2
Joined: 2/17/2008
Status: offline

The Oxygen Sensor I dont know if this could help or not...

Replacing a worn-out oxygen sensor will save you money.
Properly functioning oxygen sensors are important when it comes to your vehicle's fuel economy and exhaust emissions. That's why checking for, and possibly replacing, a worn-out oxygen sensor is an important part of every routine tune-up. Plus, properly functioning oxygen sensors are good for the environment, and can save you hundreds of dollars in gasoline costs over the life of the sensor.

A worn-out oxygen sensor:

Wastes fuel
Can cause engine performance problems, such as surging and hesitating
Is the number one cause of excessive harmful exhaust emissions
Accelerates catalytic converter damage

Replacing a worn-out oxygen sensor:

Saves money in fuel costs
Improves engine performance
Reduces air pollution
Prevents premature failure of the catalytic converter

(in reply to jsquared60)

Post #: 2

RE: ''01 Grand Am Shudders at speeds above 60 - 6/25/2008 7:01:27 PM

2kgrandam

Posts: 2
Joined: 6/25/2008
Status: offline

From experience I have learned that if its OVER 60 it means that your tires are not speed balanced, or you may have a bad tire that has a bubble in it, or tread issues such as separation or something along those lines. Under 60 means bearings, alignment, ball joint issues....
Hope this help
Mike

(in reply to daisybop23)

Post #: 3

RE: ''''01 Grand Am Shudders at speeds above 60 - 7/8/2008 11:49:49 AM

Laynie

Posts: 2
Joined: 7/8/2008
Status: offline

oxygen sensor! or unbalanced tires? i had them both that and shuddering was a symptom

(in reply to 2kgrandam)

Post #: 4