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Technical Shudder on clutch engagement Model A

Discussion in 'Traditional Hot Rods' started by crashdown, Oct 12, 2018.

  1. crashdown
    Joined: Jan 15, 2014
    Posts: 5

    crashdown
    Member

    Alright to get you up to speed.
    29 model A
    Boxed, X-frame
    Radius rods from backing plates and mounted to X-frame.
    59A bored, stroked, ported and polished
    early 90's Ford F-150 RTS 4 speed toploader overdrive

    Here is the ask:
    When the clutch is released I get a heck of a shudder. Front motor mounts are new... and transmission is secure.
    +No anti chatter bars. Would these fix the issue?
    What the hell do I do?
    Will add a video shortly
     
  2. GordonC
    Joined: Mar 6, 2006
    Posts: 3,141

    GordonC
    ALLIANCE MEMBER

    New clutch disk, flywheel, and throw out bearing? Old flywheel? Was any cutting done to true up the flywheel before installation? What linkage set up do you have? Does it shudder when you dump the clutch or if you try to ease it out slowly? Need more info.
     
    Hnstray likes this.
  3. GuyW
    Joined: Feb 23, 2007
    Posts: 649

    GuyW
    Member

    radius rods from backing plates??
     
  4. wheeldog57
    Joined: Dec 6, 2013
    Posts: 3,182

    wheeldog57
    Member

    A few things could cause this;
    Worn clutch and/or flywheel
    Bad throwout bearing
    And lack of chatter rods
    Good luck
     
    deathrowdave and 6inarow like this.

  5. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,442

    Boneyard51
    Member

    If it’s a new clutch disc, it could be the compound of the disc linings. There was a brand of clutch disc sold back in the seventies that was notorious for engagement chatter. I would never use that brand, thankfully I don’t think they are still in business.
    With most things now being make overseas, no telling what they are putting in clutch linings these days.
    Sometimes oil on a disc will make it grab, kinda backwards to what a person would think! Lol
    Just a couple of possibilities.


    Bones
     
  6. Deuce Daddy Don
    Joined: Apr 27, 2008
    Posts: 5,544

    Deuce Daddy Don
    ALLIANCE MEMBER

    Old school way------bumper up to a solid wall, rev it up & slowly release the clutch, let it "burn in" a few seconds, repeat, then go try it on road.
     
    Hnstray, 6inarow and Engine man like this.
  7. 1-SHOT
    Joined: Sep 23, 2014
    Posts: 2,693

    1-SHOT
    Member
    from Denton

    Old Fords had anti chatter Rods for that reason.
     
    deathrowdave likes this.
  8. deathrowdave
    Joined: May 27, 2014
    Posts: 3,519

    deathrowdave
    ALLIANCE MEMBER
    from NKy

    I vote for anti chatter rods also . There is a wave spring between the lining sides of the disc , there is a major difference between OEM and aftermarket wave spring . I had an old Ford chatter so badly it would shake the ash try open . Everything was new and resurfaced as it was supposed to be . I did not one thing other replace the disc with OEM disc and smooth as a fresh shave with a Wade & Butcher after the disc swap . This is where under close inspection I noticed the wave spring difference .
     
    Hnstray and RMR&C like this.

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