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UPDATE, but still need help!!!......clunking noise

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Confederate9, Jan 27, 2002.

  1. Confederate9

    Confederate9 1/2 ton status

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    i have a problem and CANNOT figure out whats wrong.
    its a clunking noise coming from my truck. it clunks faster the faster i go. and slower the slower i go. it sounds like its coming from the middle to front og my blazer.
    i have greased the front driveshaft, put new fluid in the tcasem and both differentials
    UPDATE: ok so i jacked up the car today, and put it in 4wd..... locked the hubs and such...... still there
    took it out of 4wd.... then pressed the gas and let it coast....
    i found something i think isnt right, it sounded liek the sound it makes when i drive it......
    what happens is the read 2 tires are spinning, but then the passenger rear tire slows down to almost a complete stop... then thedriveshaft is still rotating, so it catches makes a clunk... and then starts spinning on its own. then it will repeat this process..... any ideas?

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS<P ID="edit"><FONT class="small">Edited by Confederate9 on 01/29/02 02:16 PM.</FONT></P>
     
  2. riz

    riz 3/4 ton status

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    Re: help!!!......clunking noise

    <font color=purple> You got auto hubs ?

    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> monkeys steal my underwear at night
     
  3. jc71355

    jc71355 1/2 ton status

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    Re: help!!!......clunking noise

    Does that cause that? When i got my tranny rebuilt i went to get it and when i would slow down almost to a stop there would be a loud cluking noise and then it would stop. It only did it twice on the first drive so i guess the guy at the shop tried the 4x4 to make sure it still worked and didn't roll it backwards to disengage them. Oh well when i get my brakes i'm going to warn hubs.

    James


    <font color=blue>91K5 350 2.5in Suspension lift 33/12.5
    If It's a JEEP thing why is your engine and tranny the same as my K5[​IMG]</font color=blue>
     
  4. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    no, i put in warn maual premium hubs dec 25, but the sound didnt start till after new years.

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  5. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    ttt.... i still need some help here

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  6. Bigmeats

    Bigmeats 1/2 ton status

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    Re: help!!!......clunking noise

    i had same noise last year. it was the front u joints. they seemed fine while the shaft was bolted in place but after i took it out you could really see and feel the play!
    hope that helps.

    Bigmeats.....Manhattan Il

    1975 Blazer
     
  7. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    i took the front drive shaft off completely and drive it around... and it still did it.
    does it have ne thing to do w/ my new manual hubs?

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  8. Jed

    Jed Registered Member

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    Re: help!!!......clunking noise

    Did you check the U-Joints in the front axle (not drive shaft)? If the manual hubs are working properly, I'd guess that the noise should go away when they're unlocked and come back when they're locked.

    After a brake job by a mechanic who didn't know 4x4s, my front hubs were always locked regardless of the where the switch was. So be sure your hubs are actually unlocked when they say they are.
     
  9. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    this may sound like a dumb question, but where are my front u joints?

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  10. Jed

    Jed Registered Member

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    Re: help!!!......clunking noise

    The front axle has 2 u-joints, one on each side, right behind the front brake rotor/knuckle assembly (aligned with the middle of the wheel where you'd expect a axle to hit the wheel hub). They're there to allow you to steer while the front wheels are being driven. Do you get a clunk when switching from drive to reverse when in 4 wheel drive (re-attach the front drive shaft first)?

    Go to http://www.offroaddesign.com/catalog/cmfrontaxleshafts.htm and check out the pictures front axle components. A good one is the really awful purple on green color combo at the bottom - you've got one of those on each side of the diff (except yours shouldn't be wasted like that one)
     
  11. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    i do not know if when i switc from fwd to rev in 4wd if it makes the noise, i will try it this afternoon when get home from school.
    im pretty sure i now where the front axle joints are now.
    ill keep u guys posted!

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  12. Confederate9

    Confederate9 1/2 ton status

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    Re: help!!!......clunking noise

    up dated and back to the top, seems liek its the rear, maybe im wrong tho, check out the initial post i edited

    <font color=red>K5: Because size DOES matter</font color=red>
    85 K5 4IN LIFT 35 GOOD YEAR WRANGLER MT/R, AMERICAN RACING WHEELS
     
  13. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    Re: help!!!......clunking noise

    my buddy's bronco made the same noise but it was decieving we looked and looked ruled out the rear u-joint started looking at springs in the rear and shocks...even axle or gear wear and all....a month later we went back to step one it was the rear u-joint...always sounded like it was coming from the front or mid section...just undo the back u-straps and do a quick inspection takes about 10min and a 7/16's socket
    ALSO: may be a rear wheel bearing?

    Definately a pavement pounder...with the caveman clutch

    1985 GMC C-10 Shortbed
    1984 Chevy K-5 Blazer<P ID="edit"><FONT class="small">Edited by BowtieBlazer on 01/29/02 03:10 PM.</FONT></P>
     
  14. Jed

    Jed Registered Member

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    Check the adjustment and condition of the rear, passenger-side brake. Sounds like the right rear is really dragging. I suppose the right- rear bearings could be boogered as well.
     

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