Question about 2004 Chevrolet Venture Passanger

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Vibration at 45 mph.

On smooth road, the van will sometimes vibrate at around 40 to 45mph. I have recently replaced the tires with no effect on the vibration. I returned to the tire shop, they rechecked the tire balance (was good) and checked the alignment (was found to be in spec). I suspect that Torque Converter Clutch engagement is contributing to the problem, but the vibration will not disappear completely when going down a slight grade with foot off the gas pedal (which should release the Torque Converter Clutch) and trans shifted to Neutral. Any ideas would be appreciated.

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  • liketoknow Sep 26, 2008

    Flathead40,

    I didn't go back to the tire shop, just raised it in the driveway with a couple of floor jacks. I could feel the vibration clearly sitting in the driver's seat. When I examined the rotating wheels and and driveshafts, I could clearly see the inner CV on the driver's side was vibrating a lot more than anywhere else. I am relatively confident that this is the source of my problem.



    How hard would it be to replace the axle shaft in my driveway?



    thanks,

    liketoknow

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First, if the milage is high it could be a cv halfshaft even if the boots are not split. if the tires are new and no rims are bent, make sure there is no fix -a- flat in the tires, (liquid will not balance) and cause a severe vibration. i would suggest you take it back to your shop and have them put it on a lift, raise up the front wheels under the outer part of the lower control arm where the front is not hanging down too far and start the vehicle. run it up to 45mph to 60mph and have them feel in the drivetrain for vibrations and shakes.if it is felt with the car this way the vibration is in the drivtrain. inner cv's or in the transmission. thanks and let me know what you find out.

Posted on Sep 20, 2008

  • paul haggard Sep 20, 2008

    wanted to add, inner cv joints can cause a vibration or a bent cv halfshaft. thanks

  • paul haggard Sep 29, 2008

    not too difficult if you have air tools. if you don't have air tools, remember to break the cv halfshaft nut loose before you raise the car off the ground, this will keep the wheel from turning. you can also have someone applie the brake and this will hold the wheel in place. the new halfshaft should have the torque specs or ask the person at the counter, it should also come with a new nut (30 to 36mm). you will need to raise and support the car by two jackstands under the frame, remove tire , remove the two nuts and bolts holding the steering knuckle to the bottom of the strut, be careful if there is a abs wire, THEY WILL NOT STRETCH and can break very easily. remove the outer tie rod, this will allow for more flexability of the steering knuckle assembly. remove the nut on the end of the cv halfshaft. sometimes these are rusty and will need a little help pushing it through the knuckle, ( hammer, air chisel, penetrating oil). when all of this is loose and out of the steering knuckle, pry the halfshaft out of the transmission. use a big screw driver or small pry bar, be careful though not to damage your transmission. you can also tap on it lightly with a hammer and pry bar. be careful not to damage the new halfshaft or transmission during installation. good luck and thanks for the revue.

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