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4spd DF TO bearing not aligned making noise updated #966108
04/04/11 08:33 PM
04/04/11 08:33 PM
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440challenger Offline OP
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Ok so I had a problem over the weekend . I did miss a shift but not sure it has anything to do with this. Went to push the clutch in a while after and i heard a grinding noise. Looked at it quick today and saw that the throwout bearing is rubbing against the weights of my centerforce clutch. Not sure how this got un aligned .
Any ideas what could of happened?

everything is new with about 150 miles.

6568408-0404111847.jpg (101 downloads)
Last edited by 440challenger; 04/05/11 09:36 PM.
Re: 4spd DF input shaft/ throwout bearing not aligned [Re: 440challenger] #966109
04/04/11 08:35 PM
04/04/11 08:35 PM
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440challenger Offline OP
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another shot.sorry cell phone pic

6568415-0404111847a.jpg (129 downloads)
Re: 4spd DF input shaft/ throwout bearing not aligned [Re: 440challenger] #966110
04/04/11 09:17 PM
04/04/11 09:17 PM
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Kirkland, Washington
Pacnorthcuda Offline
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well, my first thought was the hub of the disk is destroyed, but no that would still leave the shaft/bearing/pressure plate centered.
Is the throwout bearing still being retained/controlled by the clutch fork????????????????
Looks like it slipped off of its mount and spring retainers.

Re: 4spd DF input shaft/ throwout bearing not aligned [Re: Pacnorthcuda] #966111
04/04/11 09:28 PM
04/04/11 09:28 PM
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from what i could feel/see it was still clipped onto the fork. .Was checking it out by myself in the dark

Re: 4spd DF input shaft/ throwout bearing not aligned [Re: 440challenger] #966112
04/05/11 12:31 AM
04/05/11 12:31 AM
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Fresno, CA
Jim_Lusk Offline
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Make sure the bearing retainer didn't break......

Re: 4spd DF input shaft/ throwout bearing not aligned [Re: Jim_Lusk] #966113
04/05/11 01:27 AM
04/05/11 01:27 AM
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Yancy Derringer Offline
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Quote:

Make sure the bearing retainer didn't break......






Re: 4spd DF input shaft/ throwout bearing not aligned [Re: Jim_Lusk] #966114
04/05/11 10:22 AM
04/05/11 10:22 AM
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JohnRR Offline
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Quote:

Make sure the bearing retainer didn't break......




What they said , even if the TO springs cam off the fork the retainer will still stay centered because it is located by the bearing retainer.

It's hard to tell but it looks like the weghts may have shifted , they do float somewhat , this is why I'm not a big fan of this type clutch .

Re: 4spd DF throwout bearing not aligned making noise [Re: JohnRR] #966115
04/05/11 09:35 PM
04/05/11 09:35 PM
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Ok so i put it up on jackstands just before and the bearing retainer is not cracked. The rings on the weight system of the DF are still in tact. It does move around, i can move it from one side to the other with my hand,but it looks as if when you depress the clutch the fingers on the PP center that weight system so it does not hit the TO bearing. Am i correct on this theroy?

heres what i have found on todays test ride. It seems like a 50/50 split that it makes noise or doesnt make noise. The noise its making sounds like a DRY bearing spinning at speed. This noise happens only when i depress the clutch. I can create the noise at a complete stop and more so when im coming to a stop and hold the clutch in and coast. I would suspect it to be a TO bearing but it only does it about 50% of the time i use the clutch. Everything is new. PP ,disc,flywheel,shift,rods, linkages,trans has new syncros,bearings.


Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966116
04/06/11 01:20 AM
04/06/11 01:20 AM
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JohnRR Offline
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Is the TO bearing new ? It sounds like the TO bearing is on the way out , or your thrust bearing is worn and the noise your are hearing is the crank clearancing itself on the main bulkheads ...

Re: 4spd DF throwout bearing not aligned making noise [Re: JohnRR] #966117
04/06/11 09:09 AM
04/06/11 09:09 AM
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TO bearing is a complete new unit with retainer from brewers. Not sure what you mean by the thrust bearing being bad . Are you talking the motor?

I was also thinking maybe when the push the clutch in it unloads the trans and alows something to move around causing the noise. when its under a load driving theres pressure and doesnt cause the noise?

Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966118
04/06/11 09:24 AM
04/06/11 09:24 AM
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Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966119
04/06/11 10:57 AM
04/06/11 10:57 AM
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Niles , Ohio
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therocks Offline
oh wait.but hey.lets see.oh yeah.
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My CF bearing went bad in about 500 miles it was in for probally 5 years though.I bought a good Timken one.Its been in 6 years and no noise ever.Rocky


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Re: 4spd DF throwout bearing not aligned making noise [Re: therocks] #966120
04/06/11 11:30 AM
04/06/11 11:30 AM
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Yancy Derringer Offline
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Well, here's the deal. Stop all the "www talk" and get the gearbox out. That's the only way you'll find out.

Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966121
04/06/11 07:11 PM
04/06/11 07:11 PM
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JohnRR Offline
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Quote:

TO bearing is a complete new unit with retainer from brewers. Not sure what you mean by the thrust bearing being bad . Are you talking the motor?

I was also thinking maybe when the push the clutch in it unloads the trans and alows something to move around causing the noise. when its under a load driving theres pressure and doesnt cause the noise?




Yes , I'm talking about the motor .

Did you put the clutch disc in the right way ?

Is the trans rebuilt or a SUPPOSEDLY good USED unit ?

As Mr. congeniality says ... stop looking for the easy answer and pull it out , even if it's the T.O. Bearing you have to drop the trans to replace it.

Re: 4spd DF throwout bearing not aligned making noise [Re: JohnRR] #966122
04/06/11 10:51 PM
04/06/11 10:51 PM
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440challenger Offline OP
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Yes im going to pull it out sunday and let you guys know what i find.Was just seeing if that noise sounded fimilar to anyone so i could buy the parts and have them for sunday so i can get the trans back in the same day. Im thinking either Pilot bushing or TO bearing. Not looking for easy way out believe me. i love tearing into this stuff.

Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966123
04/07/11 01:00 AM
04/07/11 01:00 AM
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JohnRR Offline
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Quote:

Yes im going to pull it out sunday and let you guys know what i find.Was just seeing if that noise sounded fimilar to anyone so i could buy the parts and have them for sunday so i can get the trans back in the same day. Im thinking either Pilot bushing or TO bearing. Not looking for easy way out believe me. i love tearing into this stuff.




What's the condition/origin of the trans ?

But a TO bearing and a pilot bushing if you want to have those on hand.

I wish i had your vigor , I HATE everything about working on cars lately ...

Re: 4spd DF throwout bearing not aligned making noise [Re: JohnRR] #966124
04/07/11 08:40 AM
04/07/11 08:40 AM
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440challenger Offline OP
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Trans i went though and put new syncros in and bearings. I kinda figured it wasnt the trans becuase when the noise happens and i grab the shifter down low it feels no different then other times as far as vibration. Also beings that 6 speed ls1 trans am in the youtube link above i posted is making the same exact noise, i figure both setups have a To bearing and pilot bearing in common... Ill have an answer this weekend, I hope!

Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966125
04/07/11 02:37 PM
04/07/11 02:37 PM
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FWIW. Many years ago when I first installed my CFDF assembly, I cheeped out and used a NEW, OE type T.O. bearing. I had the same problem you are experiencing. I bought a new Centerforce Throwout bearing. Before installing, I put them, face to face. The CF bearing was smalled in diameter. I'm not sure if this is your cure or not, but I haven't had any issues with the CF bearing, going on 8 years now. Good luck. I recommend also to drop the trans and see exactly what is going on.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: 4spd DF throwout bearing not aligned making noise [Re: 68LAR] #966126
04/11/11 10:52 PM
04/11/11 10:52 PM
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Well I put in the mopar roller pilot bearing that goes into the torque conveter register ( what a nice piece) . I also removed the weight system from the DF centerforce. 10% more clamping force i really didnt need. Put it back in the car with gear oil instead of atf. Wow I drove it all yesterday and took it to work today. SO much smoother. NO vibration at all on clutch pedal or shifter. No noises . Really Nice. I finnaly think i got it right the 3rd time LOL. Must of been that pilot bushing!

Re: 4spd DF throwout bearing not aligned making noise [Re: 440challenger] #966127
04/11/11 11:14 PM
04/11/11 11:14 PM
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UPPER MICHIGAN, MARQUETTE COUN...
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Quote:

Must of been that pilot bushing!




That's what I thought as I read this. The video also sounded like a dry pilot bushing.







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