97 psd vibration
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Joined: Jul 2006
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97 psd vibration
i have a 97 psd with a vibration in the engine it started around 1600-2000rpms running about 65mph. If I push in the clutch it will go away and then when releasing the clutch it will start vibrating. when it fist started it would not vibrate at an idle but now it does. the clutch does not chatter like a bad dmf. Any chance it might be the harmonic balancer? It has 116,000 miles
thanks Jake
thanks Jake
Junior User
Joined: Jul 2005
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Jake, I am betting that it is the dmf. Mine did the same exact thing. I switched to the smf and did not regret doing it. It is stronger,lessmoving parts,cheaper then a new dmf. Hopefully this will help
I have a 96 stroker and a my truck is doing the same thing, but i was wondering what a dmf and a smf are. Any information would help
I have a 96 stroker and a my truck is doing the same thing, but i was wondering what a dmf and a smf are. Any information would help
Senior User
Joined: Nov 2004
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DMF= Dual Mass Flywheel, (Stock)Basically to metal plates connected with springs and rubber. They wear out after time and start to "shake". Mine did and as titusf-350 said, I have replaced mine and have not been more satisfied. I went with the LUK Kit. My repair guy had no problem with it.
SMF = Single Mass Flywheel (aftermarket)
Hope this helps!
SMF = Single Mass Flywheel (aftermarket)
Hope this helps!
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Junior User
Joined: Jul 2005
Posts: 50
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Thanks for the information. My truck is a 96 and i have never changed the clutch and have never had any problems with it. I am not sure if that is the problem because it feels like a wheel bearing is out but i checked them and they are ok. I recently had the ball joints changed,so i am still lost. If anyone has any info please let me know. thanks
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Elder User
Joined: Oct 2005
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From: West Palm Beach, Florida
There is a possibility that it is a U-joint. When you're driving along smoothly about 50 miles an hour let off the throttle quickly and wait 2 seconds and re-apply it and wait 5seconds and then let it off again and then reapply it and see if you can feel any clunking. Also see if the vibration disappears when you're accelerating and then comes back when you're driving along at highway speed. You can also jack up the rear and wiggle the tires and see if you can find play in any of the u-joints or the carrier bearing. If it's a wheel bearing sometimes you can really hear it or feel it good in the freezing cold weather(20 degrees-ish). You just drive along slowly at a crawl and the bearing will growl at you. If you go really slow you will hear it sort of rumbling and kind of grinding. It will sound like you're driving over a small-stone driveway or over lots of small little pieces of ice like the size of marbles. It does it best on start up before everything is warmed up. Make sure your tires are aired right up good, too. That will help to make the sounds louder and clearer.
Last edited by F350_Hauler; Feb 19, 2007 at 07:51 AM.
Lead Driver
Joined: Mar 2006
Posts: 5,111
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From: western SD
We found the problem on Jake's 97 psd. It was the dmf. The large bearing in the center of the dmf had come apart allowing the flywheel mass to become off center. A new smf and as good as new. Thanks for the responces.