1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

'67 Cj5 - Dauntless Clutch Issues/questions

Discussion in 'Early CJ-5 and CJ-6 Tech' started by jjdebarros, Aug 29, 2019.

  1. Aug 29, 2019
    jjdebarros

    jjdebarros Sponsor Sponsor

    Spokane, WA
    Joined:
    Dec 26, 2017
    Messages:
    56
    Just finishing up on a year plus project and I've started to drive it around the local parking lot.

    I've got a new clutch with a resurfaced flywheel and the Advanced Adapter chain mechanism.

    I am finding that from disengaged to engaged is a really short distance on the pedal. A lot of burned rubber...

    Is this normal on a new clutch setup?

    Also, what springs and where are being used for the clutch pedal return? Concerned that the throw out bearing might be touching the clutch pressure plate when not engaged.

    I have one on the clutch fork to bell housing but it looks like the chain mechanism weight is winning out. I think it is some sort of spring left over from a brake drum rebuild.
     
  2. Aug 29, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    2,255
    In addition to the spring from the fork to the bellhousing, I run a spring from the pedal arm (below the floorboard - down near the pivot bar) to back on the frame. This second spring isn't necessarily needed (I ran with just the fork spring for a long time), but the pedal arm binds on the floorboard hole when offroad sometimes, and the extra spring return helps ensure it doesn't stick. Can't help with the amount of throw - I will say that my oem style set-up has quite a lot of pedal movement, which makes it nice to smoothly engage and disengage the clutch, especially when offroad with only a 3 speed (I often have to burn some clutch). I believe you can change how much pedal movement you need for the TO bearing based on the proportion of length of the fork on each side of the pivot stud....I don't know how the AA chain mechanism affects things, but this sounds like one of those situations were making sure you have the right clutch fork etc would be priority before trying to get into the details of modifying or customizing the clutch fork or pivot stud.
     
    jjdebarros likes this.
  3. Aug 29, 2019
    jjdebarros

    jjdebarros Sponsor Sponsor

    Spokane, WA
    Joined:
    Dec 26, 2017
    Messages:
    56
    I got the fork, throw out bearing and pivot stud from Novak
     
  4. Aug 30, 2019
    Thean

    Thean Member

    HSB Idaho
    Joined:
    Sep 1, 2017
    Messages:
    89
    The motion ratio shouldn’t have changed with the chain kit. The torque tube is a 1/1, so any difference in throw between pedal and arm should remain the same with the chain rotating around the pivot on a sprocket. I’d guess it’s in the clutch. I’d disconnect the linkage from the release arm and make sure you aren’t having a stack up height issue. Meaning pressure plate to tall or release bearing to long causing PP to constantly be under pressure.
     
    jjdebarros likes this.
  5. Aug 30, 2019
    jjdebarros

    jjdebarros Sponsor Sponsor

    Spokane, WA
    Joined:
    Dec 26, 2017
    Messages:
    56
    Thanks!
    Might be time to buy that borescope I was looking at...
     
    Thean likes this.
  6. Aug 30, 2019
    Thean

    Thean Member

    HSB Idaho
    Joined:
    Sep 1, 2017
    Messages:
    89
    That clutch release arm opening is pretty large in the bellhoising. I’d just disconnect the linkage and grab the release arm and make sure you have fore/aft play of the release bearing. If you do, then I’d start looking at clutch pressure plate and disc.
     
  7. Aug 30, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    2,255
    Do you have the old clutch fork that you replaced? Might be worth comparing the two? If you don't, maybe post a pic of it with a ruler and some measurements for us to compare? Clutch issues are really frustrating and it takes time to figure them out - mostly because removing and reinstalling the transmission is a PITA....
     
    Thean likes this.
  8. Sep 3, 2019
    termin8ed

    termin8ed I didn't do it Staff Member Sponsor

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    2,598
    Ive got a heavy duty clutch i think that i put in mine. It is on and off. I plan to replace it this winter for a oem style. Aa chain linkage now, had the stock tube setup, it didnt matter. Either linkage setup it was still on and off.

    Adjusted so it would engage low to the floor, almost all the way up, same end results.
     
  9. Sep 9, 2019
    Gkesseru

    Gkesseru New Member

    Pine, Colorado
    Joined:
    Sep 9, 2019
    Messages:
    1
    I'm picking up a 67 tomorrow that has the identical short clutch problem. Hope to see a solution here.
     

Share This Page

New Posts