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

Clutch Chatter: W/video

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by Chuck, Jun 27, 2018.

  1. Jun 27, 2018
    Chuck

    Chuck Sponsor Sponsor

    Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,329
    I did the normal inspection and found 1 bolt worked its way out of the trans mount and was sitting on the crossmember, the other 2 were loose. The insulator stud and bushings had gone missing. The b-house bolts were in between, torque to specs, and finger tight. Motor mounts were worn.
    The clutch disc, pressure plate, and flywheel didn't look bad with no grease or oil on any surface.

    I installed the following new, motor mounts, clutch kit, resurfaced flywheel, trans mount, insulator stud and bushings. Torqued all bolts to specs. Cleaned the flywheel, then cleaned it again just before installing the clutch disc. The clutch linkage seems to not to be binding.

    Still have the chatter.
    I enhanced the clutch chatter by applying the brake and slowly letting out the clutch.


    The chatter seems to be internal only everything is tight and to specs. I only see the t-case output shaft, driveshaft, and rear tires chattering. The t-case output shaft has no play.
    I ran out of time last night or I would have checked the clutch fork for movement.

    The thing that crossed my mind was the trans input shaft had some play in it (splines were in good shape). Maybe the TO bearing is binding on the shaft causing clutch chatter?
    The chatter was there before, and after work was completed. It must be something on the short list I haven't addressed yet. Thoughts?
     
  2. Jun 27, 2018
    Focker

    Focker Ran when parked... Runs while moving. Staff Member Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    5,182
    This is very interesting because mine seems to do the same thing from take off. I was thinking that my tires were gripping from torque or that it was to do with a broken motor mount? I'll have to set up a camera underneath and do what you did. Thanks for posting this. I'll be watching.
     
  3. Jun 28, 2018
    '74Renegade

    '74Renegade Sponsor Sponsor

    Fair Oaks, CA
    Joined:
    Sep 1, 2005
    Messages:
    980
    I've have this problem too, for years, and never been able to isolate it. The clutch is chattering at take off, it's somewhat better as the clutch disc has worn some.
     
  4. Jun 28, 2018
    Focker

    Focker Ran when parked... Runs while moving. Staff Member Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    5,182
    Thanks for this idea.

    I just applied this method...My chatter is somewhere else. :banghead:

    Now to test and video the motor mounts.
     
  5. Jun 28, 2018
    Focker

    Focker Ran when parked... Runs while moving. Staff Member Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    5,182
    It looks like have a broken motor mount on the driver's side. The rubber was cracked when I put the motor back in...I knew better. Now I have to track down a new set of mounts and try to swap without pulling the motor.

    :bash:
     
  6. Jun 28, 2018
    Chuck

    Chuck Sponsor Sponsor

    Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,329
    Fairly easy, I did both sides in a hotel parking lot with a floor jack and pry bar.
    There has to be a reason for my clutch chatter, I'll keep looking.
     
    Focker likes this.
  7. Jun 28, 2018
    Focker

    Focker Ran when parked... Runs while moving. Staff Member Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    5,182
    I ordered a set of motor mounts from RockAuto.

    I did the '76 Buick Skylark 231 trick if anyone is curious about which ones to get.
     
    Last edited: Jun 28, 2018
  8. Jun 28, 2018
    Muzikp

    Muzikp Sponsor Sponsor

    Sacramento Ca.
    Joined:
    Sep 27, 2016
    Messages:
    541
    I have the exact same issue. I've done the camera thing a while ago with very similar results. I haven't checked motor mounts yet, guess that's a good place to start until more ideas pop up here.
     
  9. Jun 28, 2018
    '74Renegade

    '74Renegade Sponsor Sponsor

    Fair Oaks, CA
    Joined:
    Sep 1, 2005
    Messages:
    980
    I've changed the all motor mounts, went through the manual clutch linkage then replaced it all with hydraulic. I really wasn't expecting any of this stop the chatter, it started immediately after the T18 swap.....resurfaced flywheel, new clutch and pressure plate. No chatter with the T15/original clutch.
     
  10. Jun 28, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,568
    Chuck
    It was doing this both before the clutch change and after the clutch change, with no noticeable change ?
     
  11. Jun 28, 2018
    Chuck

    Chuck Sponsor Sponsor

    Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,329
    Hey Jim!
    Yes, before, and after the new parts.
    Same clutch chatter.
    It has to be something I didn't touch. A condition that was there before and is still present.
    No cracks on the B-housing.
    I did not put a straight edge on the Bell, at the time I thought the trans insulator stud and bushings along with other items would fix the chatter.
    The bell crank seems to be functioning properly, clutch movement seems normal. I feel no binding in the pedal.
    I haven't been able to check the clutch fork with the engine running as I currently have the prestolite distributor out.
    The only thing I noticed that didn't feel right was the trans input shaft play. Not sure if that would translate to clutch chatter?
    There isn't much left to consider, trans input shaft, bell crank, linkage, outside chance of the Bell isn't sitting flush.
    Am I missing something?
    I need to have someone in the driver seat while I look and feel around under the Jeep (w/chocks).
    .
     
  12. Jun 28, 2018
    Daryl

    Daryl Sponsor Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,648
    Do you have a stay cable between the bellhousing and crossmember? Usually shows more in backing up but can cause chatter going forward too.
     
  13. Jun 29, 2018
    Muzikp

    Muzikp Sponsor Sponsor

    Sacramento Ca.
    Joined:
    Sep 27, 2016
    Messages:
    541
    I mean... as soon as I figure out what that is I'll be able to tell you for sure I don't have one :D. What's it look like? I don't recall seeing anything on mine between bell housing and cross member :confused:
     
  14. Jun 29, 2018
    Chuck

    Chuck Sponsor Sponsor

    Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,329
    Daryl, I should have listed the year (75), no stay cable. Good thought though.
     
  15. Jun 29, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,568
    Does this mean the flywheel was not resurfaced ?
     
  16. Jun 29, 2018
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,568
    Disregard. I see where you say it was.
     
  17. Jun 29, 2018
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    2,567
    Just a couple guesses here but I'm thinking possible tight pilot bushing ?
    If the driven disk or the pressure plate are not perfectly flat then that could cause intermittent clutch grabbing.
    Also bell house mis-alignment and flywheel surface could cause intermittent grabbing.
    Clutch pressure plate not adjusted ?
    Is this diaphram type or 3 finger ?

    The engine cable stay was intended to keep fan out of the radiator and has virtually nothing to do with clutch chatter.

    1970 and 1971 Dauntless CJ and Commando went to cable controlled clutches to help eliminate possible chatter.
    Cable control eliminate possible influence of frame flexing.
     
    Last edited: Jun 29, 2018
  18. Jun 29, 2018
    Daryl

    Daryl Sponsor Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,648
    The engine cable stay was intended to keep fan out of the radiator and has virtually nothing to do with clutch chatter.
    Try backing up a hill in a v6 Jeep without one.
     
  19. Jun 29, 2018
    Daryl

    Daryl Sponsor Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,648
    Try backing up a hill in a V6 Jeep without the cable and you will find out differently.
     
  20. Jun 29, 2018
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    2,567
    All my Willys 134's had the cable stay on them so I can't say on those.
    Jeep never put a cable stay on the F-134 with T98 A.
    Perhaps a bad comparison but...
    My 1976 304 did not have a cable stay and it absolutely never chattered foreward or reverse
     

Share This Page

New Posts