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  #1  
Old 09-12-2012, 10:52 PM
RainMaker RainMaker is offline
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Default Vibration at 65 to 70, eases up in left turns

I have a new to me 2003 Ram 1500 Quad Cab 4x4 with a 5.9L automatic. It has a vibration at 65 to 70 mph that I find eases up in long left hand turns on the highway.

It's recently had two new tires installed on the rear, fronts balanced and checked for roundness and new u-joints. Driveshaft balance weights all appear to be in place.

The rear tires were bad. The left rear was cupped and worn on the inside, looked like it had been up front previously or may have came from a different truck before I bought it. The front u-joint was bad (one cap rusted up bad and limiting movement). It looks like it was recently aligned and has new front outer CV joint boots on it.

I won't have time until the weekend to jack it up and check the front end all out so thought I'd see if anyone else has experienced similar issues. I'm thinking maybe a tie rod end beings it slows the vibration when in a long turn.

Thanks for any help.
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Old 09-13-2012, 11:27 AM
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It could be one of the front HUB bearings. When you jack it up see if there is movement in the wheel or if there is noise when spinning it.
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Old 09-13-2012, 08:36 PM
RainMaker RainMaker is offline
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Will check the hub bearings, thanks. Have you had a problem like this?
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Old 09-16-2012, 08:45 PM
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Hub bearings were good. Lower ball joints were both sloppy. Replaced them and now the vibration is more pronounced. The rest of the front end is tight. It does drive more solid. Will get it aligned this week.

Not much left but tires unless someone knows of other causes...
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Old 09-16-2012, 08:58 PM
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Tires will do it. Probably the left front if you say a banked left turn on a highway makes it go away.
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Old 09-20-2012, 12:10 PM
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New front tires and alignment helped some after the new ball joints were installed but there's still some vibration.

If the previous owner cranked the torsion bar adjustment way up would it cause this? The truck sits almost level so I wonder about that.

It also feels very sensitive to small bumps in the road at all speeds. Big bumps or potholes don't seem bad though.
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Old 09-26-2012, 06:53 AM
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Problem solved!

Got back under the truck and checked the CV joints. Very slight rotational play but when pushing up and down on the inner CV joints there was a lot of play where the inner CV joints slide onto the intermediate shafts.

After it was apart I could see that the splines on the intermediate shafts where about 50% worn away. This and wear on the inside of the inner CV joint slide was allowing the inner CV joints to spin elliptically at higher speeds causing the vibration is my guess.

Replaced the intermediate shafts, half shafts and axle seals and its very drivable on the highway now. Wish I'd of found this sooner but at least now the entire front end has been gone though and everything weak has been replaced.

Last edited by RainMaker; 09-26-2012 at 06:55 AM.
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Old 09-26-2012, 08:46 AM
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Great find and fix on that vibration problem RainMaker. Glad you shared your experience with us.
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Old 12-12-2012, 09:11 AM
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Had same issue as RainMaker. At higher speeds the truck would produce a bouncing issue felt throughout the vehicle. Dealership found the cause, right front shaft splines worn away and CV joint issues. Everything was replaced, front differential cover removed in order to clean out any debris such as metal shavings etc. This I would recommend.
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