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Old 10-22-2013, 04:22 PM
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New Traction Bars, now lots of vibration while accelerating

I just put a set of Pro-Comp Traction bars on my 2008 f-250 with an 8 inch lift and 38 inch tires. I immediately noticed a huge difference... in my steering wheel as it vibrates BAD under acceleration. It is noticeable at all speeds, then, you let off the throttle, and its gone. I unbolted and suspended the traction bars temporarily to ensure they were the culprit, they are. Why would they cause this vibration under acceleration?
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Old 10-22-2013, 04:24 PM
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Which ones did you buy?

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Old 10-22-2013, 04:34 PM
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The Pro Comp ones. IT just doesn't make sense to me how keeping my axle steady in one place finally, results in vibrations/shudders. The only thing I can think of is that the angle it holds them at is not ideal, but under acceleration, without traction bars, the axle would wrap backwards, producing a greater angle thus not making any sense. I understand the bars will transmit some road vibrations etc. to the cab, but this is pretty extreme vibration and ONLY under acceleration, hard or light.
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Old 10-22-2013, 04:38 PM
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Which ones from pro comp?

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Old 10-22-2013, 04:45 PM
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Sorry, here are the part #'s

Lateral Traction Bars
Part # EXP72400B

Traction Bar Mounting Kit
Part # EXP72099B
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Old 10-22-2013, 04:48 PM
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just in to follow as i have been in the market for traction bars and just cant decide on a pair i just wanna see what the issue was/is.
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Old 10-22-2013, 05:03 PM
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That's gonna be somewhat normal under hard acceleration by the pretty much ridgid 2 point connection bars. Its your axle trying to wrap but the energy has to go somewhere, so it bucks the traction bars back n forth as much as the urethane bushings will allow.

The best overall performing bars, no matter manufacturer, will be the 3 point connection with a shackle mount on the frame and an over/under mount on the axle. But....they are pricey.

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Old 10-22-2013, 06:03 PM
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I see many other users on here that are very happy with their pro comp bars. I feel like it can be made better somehow. The bolts do not line up perfectly, I had to use light to moderate pressure on a ratchet strap slide bolts through. Could this be loading the axle in some way? Has anyone tried a firm piece of rubber in between the frame and frame mount?
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Old 10-22-2013, 06:07 PM
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Quote:
Originally Posted by onebadmutha View Post
I see many other users on here that are very happy with their pro comp bars. I feel like it can be made better somehow. The bolts do not line up perfectly, I had to use light to moderate pressure on a ratchet strap slide bolts through. Could this be loading the axle in some way? Has anyone tried a firm piece of rubber in between the frame and frame mount?
Bolts not lining up could definitely be an issue. That may be making yours buck more than normal.

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