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

steady speed vibration

Discussion in 'Early CJ5 and CJ6 Tech' started by baljoint, Mar 14, 2010.

  1. Mar 14, 2010
    baljoint

    baljoint Member

    monrovia, ca
    Joined:
    Apr 24, 2006
    Messages:
    75
    i got a vibration/growl when cruising in the "sweet spot" of the throttle. any change in accel or decel (even just a little)and it stops. all gears but worse at speed. f134, t90, d18. 2.5 lift, small degree shim in back, with t/c lowered maybe 3/4 of an inch or so...
     
    baljoint, Mar 14, 2010
    #1
  2. Mar 14, 2010
    bkd

    bkd Moderator Supreme Staff Member 2022 Sponsor

    K-Town Tenn.
    Joined:
    Apr 29, 2007
    Messages:
    3,294
    think I'd start by checking play in U-joints, then motor/trans/tc mounts,
     
    bkd, Mar 14, 2010
    #2
  3. Mar 14, 2010
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
    Joined:
    Aug 7, 2003
    Messages:
    4,538
    x2
     
    Posimoto, Mar 14, 2010
    #3
  4. Mar 15, 2010
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    Intermediate shaft on the D-18?

    And what speed is 'At speed'?
    Do you feel it through the seat, or do you feel it through the wheel?
    Wheel weight? Tire pressure? On mine if it starts to get low from sitting a while it will vibrate when I get up around 45-50.
     
    1960willyscj5, Mar 15, 2010
    #4
  5. Mar 15, 2010
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    Yep, that's what I was thinking too. Check those previously mentioned items first. If they all prove OK (or you replace them) and the problem persists, then it might be the intermediate shaft. Growl is a good description. As it wears more it starts to growl under load. You might be able to feel it with your hand on the tcsae shifters.
     
    lynn, Mar 15, 2010
    #5
  6. Mar 15, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

    Joined:
    Jan 7, 2007
    Messages:
    1,524
    sounds like a bearing to me, anywhere from the transmission output shaft to the rears. note what speeds it gets pretty bad in high range, the put it in low range and when it sounds pretty bad note speed on odmeter, if the noise then gets bad at a different speed more than likley in the transfer case, or the out put bearing in the transmission. if not i would start looking at the rears.
     
    kaiser_willys, Mar 15, 2010
    #6
  7. Mar 15, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

    Joined:
    Jan 7, 2007
    Messages:
    1,524
    note that the input bearing and cluster bearings in the transmission will change with engine speed, not road speed as well as the output bearing, all of this stays the same weather or not you are in 4L, 4H, 2H
     
    Last edited: Mar 15, 2010
    kaiser_willys, Mar 15, 2010
    #7
  8. Mar 15, 2010
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
    Messages:
    2,793
    Because of the goofy forces applied to the intermediate shaft by the way the gears are cut, They will wear at the bearing points and cause a growl/vibration to occur. That was what I was thinking of. And after 50 years (like my '60) that stuff can be pretty worn, and need to be replaced or upgraded.
     
    1960willyscj5, Mar 15, 2010
    #8
New Posts