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EFV-8 Club Forum / General Ford Discussion / Vibration in new drive shaft, maybe

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Discussion Topic: Vibration in new drive shaft, maybe -- page: 1 2 3

SDExpoman

04-29-2011 @ 7:21 AM

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Roger that!

TomO

04-29-2011 @ 7:05 AM

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I am glad you found the source of the noise. It is always better to do some diagnosis before you start taking thing apart.

Tom

SDExpoman

04-29-2011 @ 6:30 AM

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Update on noise. I took the truck to the brake shop that turned my drums as they had the correct type lift.
The mechanics went thru the undercarrige much like I did without resolve, until they spun the rear wheels. Then the noise was present. After removing the rear right drum, we found the emergency brake arm completely loose as the new retainer clip I had installed failed. Best news I heard all week, as I was not thrilled in the least to potentially have to tear apart the drive shaft assembly. Another note of interest is we also discovered the pads were not making full contact inside the drums (my fault), and they are correcting that today. Thanks to all for your input regarding this matter.

TomO

04-28-2011 @ 7:54 AM

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SDExpoman,

I would get the truck up on a frame contact lift, where the wheels hang free. Have someone in the car start the engine and put the truck in gear. Then have them slowly increase the RPMs until the noise appears. Use a long screwdriver as a stethoscope and try to isolate the noise.

Mechanical noises will often sound like they are coming from an area that is quite distant from the source.

Tom

supereal

04-27-2011 @ 8:17 PM

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I'd pull the drums and check for loose parts. Almost always, the last thing you do is the cause of a problem. It wouldn't hurt to grease the center bearing, anyway. If that is a problem, it is likely someone removed the grease fitting at some time, allowing the bearing to slide down the driveshaft. The grease fitting secures the bearing carrier in place.

SDExpoman

04-27-2011 @ 4:53 PM

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37RAGTOPMAN,

Yes. There is a grease fitting on the tube. If the bearing has gone bad, is this a simple fix? Or more complex? I will check the drums first. I just replaced the entire brake system last month, all seemed tight at the time of re-assembly. Thanks for the suggestions.

37RAGTOPMAN

04-27-2011 @ 4:40 PM

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see if you have grease fitting on the driveshaft tube, if you do the center bearing could be bad letting the solid drive shaft whip around, this is just a guess,
also make sure the rear drums are tight and not hitting the backing plate,
looks like you will have to do a little checking and get back to us,
hope this helps, 37RAGTOPMAN

SDExpoman

04-27-2011 @ 3:30 PM

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supereal,
The sound is only there while driving at speeds of 10 mph or greater. No noise while in idle, or if I jump up and down on the truck itself. It makes no difference if the road is smooth or bumpy.

supereal

04-27-2011 @ 10:38 AM

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Does the sound come only when the truck is moving? Does it increase as speed goes up? It it louder at low speeds? This will help isolate the problem to the drive line, if that is the cause. It is unusual to have a noise from within the torque tube itself, as there is only a roller bearing in the middle with a solid drive shaft. The u-joint could be failing, or the u-joint cover could be loose. I'd also consider that a spring or other component has come loose and dropped into a brake drum. I assume you have checked the hubcaps to be sure that a rock or other debris has not found its way in.

SDExpoman

04-27-2011 @ 10:15 AM

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Since were on the topic of drive shafts. My '37 half ton has a cowbell ringing sound coming from the underside. I have tightened everything underneath, and yet the noise remains. Could this be related to a loose componant inside the torque tube? I'm getting tired of kids chasing me down in the neighborhood thinking I'm the ice cream man!

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