Question about 2001 Pontiac Bonneville
Had both CV's and shaft replaced as passenger side boot was busted and all the grease leaked. Started vibrating when turning left between 5 - 25 mph. Mechanic replaced tie rods (old ones were not bad) - problem remained. Had tires balanced and rotated - no change. GM mechanic suggested the hub so a new one was installed - problem remained. GM mechanic now "thinks" its a loose bearing in the transmission.
I think its in the power steering but I am only an old "under the tree" mechanic.
There might be many reasons associated with the vibration at low speed. It might be a case of power steering pump may blew.
We cannot jump to any conclusion. Let me provide you with a troubleshoot flowchart.Follow all the steps and you would know the culprit without guessing the reason.
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Posted on May 26, 2009
I do not think this can be the power steering, when the fault is in the power steering you also normally get lack of steering assistance. When I talk about power steering Iam talking about power steering pump and rotary valve. When this system is malfunctioning , you lose steering power and often get fluid leaks.
See here how power steering works.
This however do not exclude completely the possiblity of a fault depending on car steering gears , even if the fault would be quite unusual. Moreover you would understand if there is a steering fault even at lower speed, or lifting the car.
The transmission fault also look odd, even stranger than the power steering, and I do not think a transmission problem and cause the car to pull on one side.
I would double check the newly installed CV joint, suspensions and shock absorber, tires, even rear tires balancing, suspension joints, bushes or components, front brakes.
Posted on May 26, 2009
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Posted on Jan 02, 2017
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