Signs of dualmass going bad? - Ford Powerstroke Diesel Forum
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Old 10-24-2013, 04:03 PM
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Signs of dualmass going bad?

Hi, so i changed the ujoints out on my truck thinking it was them that was squeaking but its still doing it. I got under the truck and could hear a kind of squeaking coming from the transmission. By the way its a zf5. It seems like their is more vibration than normal on the highway as well. Could this be a sign of the dmf going bad? Thanks you for any and all help.
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Old 10-24-2013, 04:33 PM
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Most critical sign:
Q: Is it a dual-mass flywheel?
A: If yes, it's going bad.

Okay, more specifically:
- You hear a little extra clatter on engine shutdown
- That vibration you mention - if it goes away when you put the clutch in and coast
- You remove the inspection cover, and can move the flywheel several degrees
- You remove the inspection cover and any little bits of whatever fall out
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Old 10-24-2013, 04:50 PM
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There could be some extra clatter at shutdown ive kinda noticed that every once in awhile. I guess i havent really tried pushing the clutch in at highway speeds. However the squeakin noise that i hear happens with the clutch in or out. It usually squeaks at about 35-40 and 5-10mph. I havent removed the inspection cover. Kinda noob question but if i remove that will all my fluid drain out?
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Old 10-24-2013, 05:22 PM
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Quote:
Originally Posted by Halby95 View Post
Kinda noob question but if i remove that will all my fluid drain out?
No, the inspection cover opens access to the "bellhousing" area _between_ the engine and tranny. So it's "outside" of both; nothing will drain out.
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Old 10-24-2013, 05:45 PM
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Ok good deal. I will look into taking that off tommorow. I apreciate the help.
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Old 10-24-2013, 05:56 PM
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could it be a DP rubbing?
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Old 10-24-2013, 06:33 PM
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No i dont think it is but i will check that tommorow as well.
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Old 10-25-2013, 06:30 AM
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When I noticed my DMF gooing bad, it was a very distinct chatter, clanking and vibration. To me it almost seemed as if the motor wasn't running on all cylinders.

The noise comes and goes right, usually at start up, when in neutral, and hard shut down.
Like Madpogue stated remove the cover, use a big flat blade screw driver and if both flywheels move easily. Move them back and forth fast and see if the noise sounds similar. If it moves that's most likely your problem if and when the clutch its pressed in it stops it's dam there your problem.

If that it's the problem you can do the DMF to SMF swap. Others can chime in on the brands you can use. I choose the Autozone SMF flywheel and clutch components. Been doing very well. Any questions on how it's performing ask away.

I'll see if I have a video of when it was acting up. So you can compare it to your noise.

Last edited by 95Hailey7.3; 10-25-2013 at 06:44 AM.
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Old 10-25-2013, 01:04 PM
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Well i removed the cover and i couldnt move anything and there werent any pieces in the cover. Everything looked good. I checked the downpipe and it was close but i looked at with the truck running through all the rpns and couldnt get it to replicate the noise. So now im looking at the front brakes. Is there anyway to tell if the calipers sre stick without removing or do i have to remove them. Im kind of out of ideas as to what it could be.
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Old 10-25-2013, 05:28 PM
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A bad t/o bearing will squeal.


Sent from AutoGuide.com App
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