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Clutch Woes... Centerforce Clutch

Discussion in 'Early CJ5 and CJ6 Tech' started by DanStew, Sep 5, 2004.

  1. Sep 5, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    Before i dig into my clutch. i repalced the hydro clutch MC cylinder, and after a little tinkerig i have about and inch and change of throw with the slave. But i am not getting the clutch to disengage. I checked the fork and it is in place correctly and the throwout bearing is new, as well as fork and pivot ball. So i am having problems with the clutch operation. It isnt the tranny i put it in gear, then with the wife holding the clutch pedal down i try and push the jeep and it doesnt budge. When i put the jeep in gear and start the motor with the clutch pedal pushed in, you can hear the disc sliding on the flywheel, it doesnt stall the motor but the engine defiantely feels like it is under a strain to stay on. But when i put it in nuetral the motor idles fine. So I am pointed at the clutch assenbly. As with the other parts being new, the pressure plate is a new centerforce palte for the 225 V6, and the disc is a ford to match the tranny. the sizes match fine. I have a new pilot bushing and the flywheel has been resurfaced.

    I have heard that certain centerforce items have trouble with each other. What should i look for?? Something is not giving here. I swear i have the disc on correctly because it is labled which side goes where. But i am completely stumped. This is a regular centerforce I setup.

    Thanks for any help to get my jeep running
     
  2. Sep 5, 2004
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    I had the same problem with a Centerforce clutch. We basically have the same setup, Dan. I couldn't get the clutch to release. I have Wilwood MC and Slave. I put my old stock clutch disk and pressure plate back in and it worked fine. I doesn't take even 3/4" of slave travel to release the stock setup. I could see a slight difference between the stock and Centerforce disk. I think the Centerforce pressure plate is OK, although I didn't use it. I took out and put in my tranny three times in one day before I figured out what the problem was.
    Next time I have it apart, I'm going to try the Centerforce pressure plate with the stock disk. I'm willing to bet you pink slips that's your problem. Good Luck. Been there!
     
  3. Sep 5, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    What was the stock parts you had to put back in?? Unfortuatnely i ened up losing my old clutch parts because i wanted to hav a total new setup. So i guess i should just get a new stock pressure plate then get the stock ford disc. Does this sound right. Yup i guess we are in the same boat. Reallky does suck that this is happening, at least i know my hydro system is fine. :(
     
  4. Sep 5, 2004
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    I forget what the diameter of the disk is supposed to be, but I just bought a Ford clutch disk for the T18 and a GM cover for that diameter disk. Seems like it was 10 1/4" or there abouts. Did you buy your Centerforce from Advance Adapters? Summit? I know it's frustrating, but you are almost there. I had to figure this one out by myself.
     
  5. Sep 5, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    I used the centerforce database to pick out my parts. I used the 225 pressure plate nad then used a ford truck disc. I then ordered it through summit. The plate and disc were 10.5 inches, they both matched and botled up fine. Only thing i can think bout is the disc maybe wrong, maybe i should have used a car, there are so many differnt disc (it looked like it) for the ford spline and diameter that i jsut chose a truck. But then again that really doesnt have anything to do with the pressure plate being engaged unless the centersection of the disc was too large and hidnered the disengagement. So I wonder If i should get a stock 225 pressure palte and keep the cetnerforce disc or vice versa :(
     
  6. Sep 5, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    I was jsut talking to a buddy of mine and he suggested that the disc is too rough from manufacture and that if it wears down it will behave accodringly. This also makes me think the ford truck disc may have been a little thicker than the ford car disc so i do indeed may have to wear it down a little. I jsut have to watch out and not overheat anything.. So i will try this tomorrow. and see how it goes.
     
  7. Sep 6, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    HHHMMM I had a suggestion on another board that i shorten the fork. I am wondering if i can drill a hole in the fork closer to the inside, or would i have to remove th efork and cut and weld it??. Supposidly the reason is the fork in hydrolic applications are shorter, given i do not know if that is truth or not.
     
  8. Sep 6, 2004
    Southtowns27

    Southtowns27 Custom Title

    The Backhills of...
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    If you can drill a hole closer to the pivot point, go for it. It's a whole lot easier than pulling the tranny. If that doesn't work for you, it's time to pull the clutch. I hate to say it, but I've yet to hear something good about Centerforce stuff. I'm glad I didn't get one. If I had to bet though, I'd say there is something up with the clutch disk itself. Just my .02
     
  9. Sep 6, 2004
    william_cj3b

    william_cj3b 3BOB driver

    Milton, FL
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    A slightly bent (not noticeable unless you look for it) disk could cause the problem. I had one do that. When I tore it back down and checked the disk, it bent less than a 1/16".

    I'm pretty sure you've checked this already. Did the new disk fit the input shaft correctly? Not loose, but slides freely on the splines? If its jammed on the input shaft it will act just like you described. Also the truck disk being thicker vs. a car one seems plausable. Good luck with this one, let us now what you find. (cause I've got a t18 I might do sumpin wid one day)
     
  10. Sep 6, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    I guess it is time to pull the clutch. I tightened fdown the clutch for a bit wi the slave cylinder to add some extra pull and it didnt solve it it is still the same situation. I am wondering bout the disc binding on the input shaft, i never thoguht of that. I do remember putting it on and sliding good. but i did have some trouble getting the tranny up into the clutch, i did align it, but it could have been off and when i forced the tranny into it could have binded it up. I wonder if i can just get a stock ford disc and not worry bout the centerforce disc if i bent the centerforce disc. Something just isnt right here. Now time to take it all apart :(
     
  11. Sep 6, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    Looks like it defiantely may be the clutch palte or disc. i am trying to remove the tranny now and i cannot get it to come out at all. So i think i bent something putting it in :( I have to enlist a buddy to help me gt the tranny off. Boy is this a PIA :( But at least i can find out what is leaking in the front of the tranny ;)
     
  12. Sep 6, 2004
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
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  13. Sep 6, 2004
    william_cj3b

    william_cj3b 3BOB driver

    Milton, FL
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    Dan, once you get your trans down and the clutch off the flywheel, stick the trans back up there and verify that the input shaft fits in the pilot bushing (no bellhousing required). I've seen a couple times where the bushing got deformed and bound on the input. I wish you weren't 8 hours away. I'd be over right away to give you a hand. Good luck.
     
  14. Sep 6, 2004
    A Mandery

    A Mandery Member

    Indianapolis,...
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    Dan, sorry you are having trouble. I have been using CF clutch and PP for 8 yrs. No problems and it never slips. I did not have the added complication of the T 18. The combo for T 86 went in without a hitch. Don't give up. I have been very pleased with the lighter pedal feel as compared to a HD, heavy spring, clutch. AM
     
  15. Sep 7, 2004
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    I think the problem is with the Ford disk being used with the GM flywheel and pressure plate. I was able to compare the stock clutch disk with the Centerforce disk and they are different at the center and in the amount of offset. Don't try to move the pivot point or re-engineer the clutch setup. Just dump the Centerforce disk. It may be that there is a difference between a truck and a car clutch disk, but I've never heard of a T18 being used in a car. Bottom line is, I'm running a 225 with a T18 and Wilwood MC and Slave and I had the exact same problem that you have and the only way I know of to correct it is to lose the Centerforce clutch disk.
     
  16. Sep 7, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    So what disc did you end up using?? Since the T18 swap is not a factory swap I cant goto an auto store and order up a kit for the tranny engine combo. So i can keep the centerforce pressure plate, but get a factory disc??
     
  17. Sep 7, 2004
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    I just got the generic Napa/Kragen type clutch disk. I think that maybe the problem is caused by the fact that we use the recessed flywheel. Ford plates aren't. So probably the Centerforce disk works fine on the Ford plate, but doesn't work on the V6 we're using. Non Centerforce disks seem to be OK. It may be some small design difference between the two. I have very little freeplay in my pedal and my clutch releases about half way to the floor. The Centerforce pressure plate (properly called the clutch cover) may be fine with the stock disk. That combination I didn't try.
     
  18. Sep 7, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    Thanks Posi!!! I will have to get the stock disc, i have heard the local stores wont sell them individually anymore, only in kits, so i hope that isnt the case. I will get one later today hopefully.
     
  19. Sep 7, 2004
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    Well some sort of success. I called NAPA and got a disc ordered and i will get it in the morning. You know i think the problem was that i got the clutch disc for a truck, and looking at Lynns part nubmers he used a ford car. So the differnce maybe there. So I am crossing my fingers that maybe this will be the fix. Thanks for the help guys!!
     
  20. Sep 7, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Dan: 9 months before I bought my Jeep the PO rebuilt the tranny and put in a Centerforce clutch. I love it. One of the smothest and easiest I've ever used (that includes Jags, Triumphs, Vettes, Ferraris, Aston Martins, Lamborginis and a few others).

    Heck, even Hippo remarked "Waoh--I love that clutch"! R)
     
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