"Thumping" under drivers side floorboard - DodgeForum.com



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"Thumping" under drivers side floorboard

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  #1  
Old 01-23-2014, 08:37 PM
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Default "Thumping" under drivers side floorboard

I have a 03 ram 1500 4x4 that I have been chasing down problems. It had a bad shake over 65mph so I finally got around to new tires, inner/outter tie rods, new lower ball joints, uppers are fine, new shocks and new brake pads/rotors/ and calipers. But now I get what I would describe as a thump feeling that seems to come and go with rotation of tire, somewhere on the drivers side I can feel in the floorboard. It only happens over 42mph, braking doesn't change it but it seems to quite down when accelerating. Truck was aligned after everything and tires have been balanced twice.

Any helpful insight would be appreciated, I'm reaching wits end working on this thing when it's below zero
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Old 01-24-2014, 12:45 AM
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Check and make sure nothing is stuck in the tire
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Old 01-24-2014, 07:20 AM
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I would check u-joints in front driveshaft.
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Old 01-26-2014, 09:01 PM
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i just checked the tire and nothing stuck or out of the ordinary. as far as front u joint are you referring to the front cv shaft? and whats the easiest best way to check them
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Old 01-27-2014, 12:40 PM
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I would also have the front hub bearing checked.
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Old 01-27-2014, 12:55 PM
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If it's 4wd you got a driveshaft that goes from transfer case to a flange at front differential. There's a ujoint that connects the driveshaft to the flange yoke.
How can you check it? I would simply unbolt those 4 bolts and remove that driveshaft. You don't need it unless you are using 4wd. Drive it and see if the problem is gone. If it is then it was that u-joint. They sell replacements that have zerk fittings. That way you can regrease ever so often and supposedly last longer. Good luck
The reason that's my 1st guess is that you feel it right under you in floor board and because, like me , it got better when accelerating.
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Old 01-27-2014, 04:13 PM
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Make sure you don't have a tire coming apart.
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Old 01-27-2014, 07:33 PM
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Tire seems good they are only a week and half old, I got the four bolts out for the driveshaft, how does it come out from there? I see a boot with a clamp. Does it all come out as one or just the main shaft and ujoint?
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Old 01-27-2014, 08:26 PM
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cut the clamp, then pull drive shaft out. You can use a zip tie for the boot. When you put it back.
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Old 01-27-2014, 09:21 PM
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Mine just slid right out.
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