Thumping while turning

[Brent Greubel]

In the last two weeks my sport trac has developed a thumping vibration when turning right at 40mph or above. It doesn't have to be a sharp turn, just changing lanes will cause it and it only happens when turning right. I had new tires, shocks, front ball joints installed about 3 or 4 months ago. Has anyone experienced this or have any ideas on what it could be? It's a 2003 with about 99k miles.



Thanks,

Brent

 

[Rodger Tellefson]

Check your front end links. If broken replace both sides.

 

[Jerry Abson 3]

Sounds like your running over the cat heads / turtle heads / bumps in the road!



JK, +1 re front links.

 

[Les]

CV joints...

 

[Brent Greubel]

Thanks for the quick replies. I didn't notice anything that looked broken or worn but I'm in no way an expert. I've included some pics to see if anyone else spots something that looks like it needs replaced. The vibration can be felt in the gas and brake pedals.



Passenger Side

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Driver Side

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[scott degroot]

Sounds like a possible left front wheel bearing to me

 

[Brent Greubel]

Just noticed in my last picture (above) the lower ball joint (I think) has a bunch of grease on it. Went out and looked at it and there is a cut in the rubber. This is on the drivers side. The lower ball joints were replaced in March, but could this be causing the vibration/thumping when turning slight right?

 

[scott degroot]

^^^



It's possible however unlikely. If you were having a ball joint issue you would have other symptons, especially when the suspension cycles.

 

[Roger Batts]

Possible CV joints? I noticed your Trac is a 4X4.

 

[Fritz C]

I have exactly the same problem. I've changed almost every wearable part in my front left and its still there. I'm now down to the CV joint. The replacement arrived today. Will let you know how it turns out.

 

[Matthew Runals]

check your wheel bearings. An easy test is just jack your ST up on that side and tug on the wheel, if it moves then its your wheel bearings.

 

[scott degroot]

^^^



Just because there may be no play in the wheel bearing doesn't mean that the bearing is ok, The bearings will start making noise before they develop play.