Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

What could break in a rear axle that would...

Discussion in 'The Garage' started by lochenjons, Dec 14, 2006.

  1. lochenjons

    lochenjons 1/2 ton status

    Joined:
    Sep 13, 2006
    Posts:
    682
    Likes Received:
    0
    Location:
    Santa Cruz, CA
    Cause a clunking or popping sound at very low speeds and especially when the wheels turned. I popped the diff cover (had to anyways) and everthing looked fine. It drives fine at any speed above like 1 mph. I wheel it all the time and never have a problem. I thought it might be the ujoints (wishfull thinking i guess) but the guy who regeared the front said it sounds like somethings broken in the rear. My other friend said it might be the wheel bearings. Ill try and get a video off it so you can hear exactly what it's doing because it sounds pretty bad. btw its a 12 bolt 4.56 posi
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    Posi or gov-lock?

    My 10 bolt gov-lock would make noise turning on it's way out, the 14SF I have in there now stays locked up randomly, but doesn't make any noise other than the tire scrubbing in corners.
     
  3. lochenjons

    lochenjons 1/2 ton status

    Joined:
    Sep 13, 2006
    Posts:
    682
    Likes Received:
    0
    Location:
    Santa Cruz, CA
    posi. its a really noticable sound and the truck will move like jump kinda as it makes the noise. sometimes its way worse than others. Like today it was almsot hard to get it to do it untill i turned into my driveway with the wheel turned all the way then it was really bad.
     
  4. mxfireman

    mxfireman 1/2 ton status

    Joined:
    Dec 7, 2002
    Posts:
    2,480
    Likes Received:
    0
    Location:
    LHC, AZ
    Is this the first time you have ever driven with posi? Did it just get installed?
     
  5. noJeepshere

    noJeepshere I Drive Trains! Premium Member

    Joined:
    Jan 2, 2003
    Posts:
    8,585
    Likes Received:
    755
    Location:
    City of Sand, UT
    sounds like a posi as well, my 81 with a 12 bolt has the posi diff and in low traction situations it locks up and has a tough time getting out, causing it to be a pain in the butt to drive on pavement.
     
  6. lochenjons

    lochenjons 1/2 ton status

    Joined:
    Sep 13, 2006
    Posts:
    682
    Likes Received:
    0
    Location:
    Santa Cruz, CA
    Well, sorta. I;ve had the truck (with posi) since mid summer and it always did it. I didnt notice it when i test drove it cause like i said sometimes its hard to get it to do it. Its a pretty violent clunking tho. If it is the posi lockgin up is it bad? Because i could care less if it does it but i do care if its gonna break the whole axle or ruin anything.
     
  7. bigblock72

    bigblock72 1/2 ton status Premium Member GMOTM Winner

    Joined:
    Oct 18, 2005
    Posts:
    1,234
    Likes Received:
    58
    Location:
    American Fork, Utah
    Sounds like a posi unit in need of some friction modifier. Go down to the parts store and ask for some friction modifier. Honest I'm not sending you for muffler bearings or blinker fluid :D ."Equa Torq" is a brand name of it, add at least 4 ounces and it may take 8 ounces as bad as yours sounds.
    And no it isn't particularly bad for it to make noise but it sure gets annoying. A Gov-Lock that won't unlock is the most annoying though, especially a dually with a fully loaded fifth wheel.:mad:
     
  8. lochenjons

    lochenjons 1/2 ton status

    Joined:
    Sep 13, 2006
    Posts:
    682
    Likes Received:
    0
    Location:
    Santa Cruz, CA
    Yeah I heard about this but didnt know the name. Some guy was telling me I had to add something or it would make noise and I figured the truck makes so much noise already it wont matter. I didnt think it would be a popping clunking noise. Ill have to try that tho
     
  9. bajaviking

    bajaviking 1/2 ton status

    Joined:
    Apr 10, 2002
    Posts:
    752
    Likes Received:
    2
    Location:
    Baja
    Also check that your rear ubolts are tight, if they are not torqued down pretty good they can make popping and clunking noises, just something else to check.
     

Share This Page