ZF 5 s47 sounds like marbles in a coffee can

Baker42 · Jul 20, 2014

Thanks maybe if I asked what phone you have I would get an answer.

79jasper · Jul 20, 2014

You said the flywheel is good.
But is it a dual mass or solid?

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Arisley · Jul 20, 2014

79jasper said:
When did ford ditch the dual mass flywheel?

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97stoker350 said:
single mass flywheel will make this sound. i have a valair single mass with ceramic disk and at certain times like when you lug it down past 1k rpms it will sound like gears grinding. if this is what you think might be the problem don't worry about it
http://www.valairinc.com/performance/7394-98.html

take a look at velairs site. note that it says some trucks not all so that may be why the other trans didn't make the sound

Garbage_Mechanic said:
Most important question yet: DO YOU STILL HAVE A STOCK DUAL MASS FLYWHEEL?

If you do, most likely it is self destructing. They have been known to break tranny cases due to vibration when they are really bad.

Can make all of the symptoms you have described. I have run a lot of ZF5's hard and never lost the bearings. Not that they cant be bad, just likely something else.

97stoker350 said:
What flywheel do u have

97stoker350 said:
So it is a farely new flywheel?

Looks like people were trying to answer your question a few times.

BTW, I have a Iphone.

TyCorr · Jul 20, 2014

Arisley said:
Looks like people were trying to answer your question a few times.

BTW, I have a Iphone.

Android Andy. Android.

Arisley · Jul 20, 2014

Next phone will be.

My Iphone sounds ugly. Might be the transmission.

Baker42 · Jul 20, 2014

lol well the trans is good. A rebuilt unit, it must be the clutch. I have gone this far I guess I will through a clutch at it. I'll probably go with a luk this time. Southbend has not been to reliable for my 7.3

Baker42 · Jul 20, 2014

solid flywheel I think southbend uses a luk flywheel. The sound is best as I can describe it is like a 1 inch bearing spinning on a 3/4 inch shaft

97stoker350 · Jul 20, 2014

Gotta be ur clutch man and to be honest my valair has been fantastic. I'd seriously consider one of theres

Baker42 · Jul 21, 2014

Will do

Baker42 · Jul 23, 2014

Well I spoke with Peter @ southbend clutch and he agreed to send my a new disk. Do you think I should replace the flywheel at the same time. I'am pretty sure the pressure plate is ok to reuse. But maybe the flywheel has run out on it. Its getting louder and It just has to be the clutch unless my crank is walking around, but I dont think so. The sound is only present with my foot off the pedal. If you push the pedal in it doesn't make a peep

79jasper · Jul 23, 2014

Yep.

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Baker42 · Jul 23, 2014

They have one at parts plus here in town. It is made by sachs do you think it is compatible with the south bend setup? I think it should be a luk style design just like the southbend

SoGrand · Jul 23, 2014

Is the noise only when idling or is it constant while driving? Call me at my shop 888-824-2012

Dan

97stoker350 · Jul 23, 2014

I'd replace the whole thing you've come this far already

Baker42 · Jul 29, 2014

Well out she came and what I found was no good.
The pressure plate had a dark blue burn to it and there was a scar one inch from the bottom all the way around it. The south bend disk had one of the segments separated and the organic side was burnt almost black. Peter at south bend warranted the disk, (I'm extremely happy with their customer service)and I bought a new "Impact" pressure plate an exact replica and probably the same pressure plate that south bend sells. Had the flywheel machined and the sound is gone. I will now be able to sleep at night. I have ben wrenching for 22 years and never heard That sound and I hope you all never have to. Thanks for listening PSA