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1994.5 - 1997 7.3L Power Stroke Diesel  

Flywheel chatter?

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Old Nov 7, 2015 | 06:48 PM
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Flywheel chatter?

I just bought a 97 Powerstroke with manual Tranny. The truck runs great as long as I'm giving it throttle but at idle in neutral there's a terrible rattling and shaking sounds like it's coming from Tranny. Sometimes after I get on it and let off throttle driving down road it does same thing to much lesser degree. The truck seems to shift good other then an occasional complaining syncro in 2nd and 3rd.
 
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Old Nov 7, 2015 | 07:24 PM
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It sounds to me like your throughout bearing is going. When idling in neutral if you engage and disengage the clutch will it change sounds?
 
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Old Nov 7, 2015 | 07:27 PM
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It does sound a little different when I push in clutch at idle almost like a whine
 
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Old Nov 7, 2015 | 07:29 PM
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But when it's rattling and I depress clutch rattling stops
 
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Old Nov 7, 2015 | 07:33 PM
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I guess I can explain better, rattling usually starts after I give it significant throttle however only rattles at idle. Rattling will go away if I depress clutch or touch throttle. Sometimes it idles fine, other times will almost rattle engine out of truck
 
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Old Nov 7, 2015 | 09:27 PM
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I'm assuming you don't know if it has the dual mass flywheel in it. I would recommend removing the inspection cover and checking the flywheel for play. The dmf has been known to blow out the side of transmissions for some so I would do it ASAP.
 
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Old Nov 7, 2015 | 09:42 PM
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If you have a single mass flywheel, you are probably hearing "gear roll over", from the transmission. Over filling the tranny can help lesson the noise.
 
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Old Nov 8, 2015 | 12:46 AM
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He says he hears it in nuetral. There wouldn't be any gear roll over in neutral
 
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Old Nov 8, 2015 | 11:03 AM
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Originally Posted by MOOSE_MACHINE
He says he hears it in nuetral. There wouldn't be any gear roll over in neutral

Yeah, there will still be gear roll over noise in neutral. Everything in the trans is still turning when in neutral and the clutch engaged, it's just not turning the output shaft. My '97 did it bad.
 
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Old Nov 8, 2015 | 12:32 PM
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Interesting
 
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Old Nov 8, 2015 | 12:37 PM
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In neutral is the only time mine does it.
 
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Old Nov 8, 2015 | 02:20 PM
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In gear is the only time mine does it. Low rpm
 
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Old Nov 8, 2015 | 05:04 PM
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Is it hard to switch over to single mass?
 
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Old Nov 8, 2015 | 05:48 PM
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Originally Posted by MOOSE_MACHINE
In gear is the only time mine does it. Low rpm
I don't have any noise....?!?!
 
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Old Nov 8, 2015 | 06:42 PM
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Originally Posted by fordman67
I don't have any noise....?!?!
if you really want we can elaborate on that lol
 
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