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Old Jul 13, 2009 | 10:58 AM
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Question Bad Ball Joints?

I took my truck on a road trip this weekend and noticed that a small "clunk" when stopping was back and worse than ever. Not always but often, when coming to a complete stop at about 15-20 mph there is a good clunk. I had it before and changed out the sway bar bushings to new Energy bushings. I hadn't heard it in a while but I haven't been driving it very often.

On a side note that might not be related, I also have a small
clunk when accelerating from a complete stop. If I baby it off the line I don't here it.

In the past year I changed both front hubs. And in the last 2 months all the brakes, new front rotors and Bilstien shocks all the way around.

I am thinking that this means the ball joints are bad but I don't remember an play in the wheels when it was off the ground when I was changing shocks and brakes.

What else should I check and what is the best way to check them?
 
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Old Jul 13, 2009 | 11:02 AM
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You sure the clunk is from the front? Usually a clunk as you are slowing down and another at takeoff is typically the slip yoke on the driveshaft.

But as for checking ball joints, lifting the front and checking for wheel play is the way to go. If you get wobble in any wheel, check to see if the ball joint is moving. If it's not moving, then it's probably the wheel bearing.
 
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Old Jul 13, 2009 | 11:09 AM
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The clunk could also be the sway bar bushings, but I think Curtis is right... you need to grease the slip yoke on the rear driveshaft.
 
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Old Jul 13, 2009 | 11:15 AM
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I think the clunk is from the front. Is the slip yoke the same as the slip joint? If not do you have a link/directions for for greasing? Greasing the slip joint was on my list of to-dos this week and I have directions for this.
 
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Old Jul 13, 2009 | 11:20 AM
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Slip joint greasing
I meant slip joint, fumble fingered it. If you are sure the clunk is up front, don't rule out the sway bar bushings.
 
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Old Jul 13, 2009 | 11:25 AM
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I already changed out the sway bar bushings a couple months ago to new Energy Suspension bushings. I need to retorque them but I don't think they are the problem but I will double check them. Can a dry slip joint really cause that much noise?
 
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Old Jul 13, 2009 | 11:40 AM
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New balljoints on the drivers side fixed my clunk. The exact samescenario you have. Clunked both starting and stopping most of the time.
 
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Old Jul 13, 2009 | 11:43 AM
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The dry slip joint can actually get to the point where it feels like someone is lightly kicking you in the butt when you take off. Some folks have gone as far as installing a zerk fitting and periodically pumping a shot of grease into the slip joint to keep things lubed well.
 
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Old Jul 17, 2009 | 10:50 AM
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If anyone needs to replace their ball joints here's a link to them on our site.

Ford Truck Ball Joints
 
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Old Jul 22, 2009 | 01:10 AM
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here is an excellent write up which includes the process for making the special tool to install new seals. I found this very helpful. Includes part numbers and everything.

http://www.superdutypsd.com/ball_joint_article.php
 
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