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Clutch ?s

Discussion in 'The Garage' started by dragoonranch, Nov 8, 2006.

  1. dragoonranch

    dragoonranch Registered Member

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    On my 78 350/465, I have an 11 inch clutch, will the 12 inch fit on the same flywheel or would it have to be changed?

    Is there much of a difference between these two clutches?
     
  2. bronc3buster842001

    bronc3buster842001 1/2 ton status

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    it should fit i put a 12 inch clutch in my truck that had an 11 incher
     
  3. 73k5blazer

    73k5blazer Unplug the matrix cable from the back of your head Premium Member

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    It'll fit. No problem. Makre sure you get the pressure plate that goes with that clutch though.
     
  4. MattK

    MattK 1/2 ton status

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    wouldn't there be issues of the flywheel only being worn in the area that the 11" made contact with?
     
  5. dragoonranch

    dragoonranch Registered Member

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    didn't think of that, guess I could get it turnded down
     
  6. diesel4me

    diesel4me 1 ton status Premium Member

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    one thing..

    I had no luck getting a 3 finger 12" pressure plate to clear a "full" aluminum bellhousing a few times,it was too big and rubbed on the bellhousing....ended up going with an 11" diaphram style clutch instead..which is plenty beefy enough anyway,especially if its a "centerforce" design..

    I never tried using a 12" diaphram style pressure plate with the full aluminum bell housing,it might just fit...I'd definately have the flywheel re-surfaced regardless of what size you put in,its not worth doing the job if you dont do it 100%--it'll come back and bite you in the butt!..:crazy:
     
  7. 73k5blazer

    73k5blazer Unplug the matrix cable from the back of your head Premium Member

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    Flywheel resurfaced is a given. Always a must.
     
  8. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    not for this redneck... :haha:
     
  9. dragoonranch

    dragoonranch Registered Member

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    Well, we shall see soon enough, the dual action centerforce 12" hsould be at the shop soon enough.
     
  10. 73k5blazer

    73k5blazer Unplug the matrix cable from the back of your head Premium Member

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    I've put the Centerforce dual friction 12" on my 1973 SM465 350engine.
    Fit no problem.
     
    Last edited: Nov 10, 2006
  11. cj7jeep81

    cj7jeep81 1/2 ton status

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    i'm running a 12" luk clutch in mine. i believe the bellhousing is out of a '79.
     
  12. dragoonranch

    dragoonranch Registered Member

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    I am switching to a hydro clutch w/ a Novak kit, so we are replacing the clutch while it is apart replacing the fork. this truck was auto, and PO did a half ass job on the swap so the linkage is janky at best. You have to stand on the clutch pedal pretty hard to work it, and on the rocks it wears you out. I appreciate yalls input on all of this.
     
  13. B_to_C

    B_to_C 1/2 ton status Author

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    Huh...never knew :dunno:
     
  14. pvfjr

    pvfjr 1/2 ton status

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    Hey now, there's nothing janky about a metro. :mad: :p:

    Mark down another one for having a 12" clutch. I've got a 12" luk pro gold in my crew cab behind the 454. It's an 84 with the aluminum bell housing, diaphram style fit no problem.

    In regards to switching to hydro, did you see that "tech article" that supersize75K5 did? Seems like a good way to go, using cheap off the shelf stuff. Don't even have to drop the tranny (even though you are already).
     
  15. dragoonranch

    dragoonranch Registered Member

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    I might have, but will go back and check it out.
     
  16. MattK

    MattK 1/2 ton status

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    im also runnin the 12" luk pro gold diaphragm clutch. so far it has been super smooth, no problems.
     
  17. bronc3buster842001

    bronc3buster842001 1/2 ton status

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    i ran a 12'' clutch from autozone in my 78 it fit without a prob
     

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