Other Order Propshaft Speed Related Vibrations
Other order propshaft speed related vibrations cause higher than three shakes or disturbances for each revolution of the propshaft. This type of vibration is very rare.
Note: Some vehicles equipped with an automatic transfer case can still have the front propeller shaft rotate in two-wheel drive; however, it will not rotate at the same speed as it normally would in four-wheel drive. Shift the vehicle into four-wheel drive during diagnosis to eliminate the this potential diagnostic problem.
IMPORTANT: A component that is out of balance will NEVER cause a second or higher order vibration, only a first order vibration.
Other order propshaft vibrations are usually caused by:
Failed double offset (Rzeppa) CV joint. Some CV joint shafts use a double offset joint (Rzeppa Joint) rather than a tri-pod joint. The double offset joint typically has six ball bearings, therefore it will have a sixth order vibration when it has a problem. - Click here to diagnose
Vibrations caused by bearings usually can be heard and felt. Bearings are usually under a load of some kind. Changing the load on the bearing should change the sound or amplitude of the vibration. The pinion and side bearings in an axle are loaded differently during acceleration and deceleration. Click here to learn more.
Occasionally a vibration concern is not easily diagnosable or correctable. Some vehicles, especially long bed pickup trucks, will have body/frame flexing problems. This is more noticeable while driving unloaded on a road with evenly spaced cracks, like most freeways or expressways. Check with the vehicle manufacturers dealership to see if there are any service bulletins addressing this problem.
This page was last modified Thursday, March 05, 2009 09:02:31 PM
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