drive line noise

Discussion in '40- & 55-Series Tech' started by AKFJ62, Feb 12, 2009.

  1. AKFJ62

    AKFJ62

    Messages:
    184
    Likes Received:
    0
    Joined:
    Jul 22, 2007
    Location:
    Alaska
    I have a 70 fj40 with a SBC. Sprung over with Signaw P/S.

    I understand I'mgoingtohave some driveline noise and viberations but I need to know if there is a way to reduse my noise. it souds like something is grinding when I decelrate. any suggestions would be great. also if I could see some pics of some simular setups and what works for you. thanks in advance
     
  2. 65swb45

    65swb45 Elder Statesman Supporting Vendor

    Messages:
    24,353
    Likes Received:
    9,364
    Joined:
    Apr 14, 2004
    Location:
    818-953-9230
    If the noise is markedly different on decel, there is probably a problem that needs to be promptly diagnosed and fixed. Tell us what you've done so far.

    Checked u-joints?
    Checked pinion flange endplay?
    Checked pinion backlash?
    Checked driveshaft spline contact?
    Checked tailshaft freeplay in the transfer case?
    Checked/replaced trans/transfer/rear end fluids?

    Makes it easier to get advise you can use. Course I suppose advise to check these things, if you haven't done so, is advise too.;)

    Best

    Mark A.
     
  3. ranger

    ranger

    Messages:
    1,169
    Likes Received:
    7
    Joined:
    Jan 18, 2003
    Location:
    Mountain Hole, Idaho
    What tranny, xfer case are you running?
     
  4. AKFJ62

    AKFJ62

    Messages:
    184
    Likes Received:
    0
    Joined:
    Jul 22, 2007
    Location:
    Alaska
    the noise is comming from the front driveshaft. I snapped a u-joint in the rear and drove it home in front wheel drive thats when I noticed the noise. I need to make a rear track bar so I don't snap another rear u-joint.
    the noise only happends at high speeds and when I let off the gas. or going down hill at high speeds.

    I'm running the 74 4 speed toy tanny and t-case
     
  5. AKFJ62

    AKFJ62

    Messages:
    184
    Likes Received:
    0
    Joined:
    Jul 22, 2007
    Location:
    Alaska
    also completely rebiult the front out put shaft and all new 3rd members
     
  6. grant5127

    grant5127

    Messages:
    5,025
    Likes Received:
    18
    Joined:
    Oct 31, 2003
    Location:
    Meridian,TEXAS
    I wouldn't worry about it, unless you plan on running it at high speeds on the front shaft only......
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.