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.

Driveline clunk noise

Discussion in 'The Garage' started by MOLON LABE, Jul 19, 2005.

  1. MOLON LABE

    MOLON LABE Registered Member

    Joined:
    Apr 15, 2005
    Posts:
    28
    Likes Received:
    0
    Location:
    Arizona
    In 1985 I special ordered a 1 ton 4x4 just the way I wanted it. Not a dually, 454, 4-56 gears, all the bells and whistles.
    It was a great truck except it had the "factory clunk" from day one. When putting it in gear, brake pedal pressed, it made a loud metallic "clunk" like the u-joints were gone but it wasn't them. I took it to our two local dealers, both said tough luck, it's a normal condition, nothing was wrong. I complained up the chain of command but no luck.
    I sold the truck a few years later.
    Fast forward to now. Last year I bought a creampuff 1990 suburban 1500 4x4, 5.7 with only 30,000 original miles and it has the same noise.
    I have since heard that packing grease somewhere in the driveline would fix it for a while, is this true and how and where do I do it ??
    Also, is there a permenant fix for this ?
    Thanks in advance.
     
  2. Brocky

    Brocky 1/2 ton status

    Joined:
    May 22, 2005
    Posts:
    1,170
    Likes Received:
    1
    Location:
    St.John's Newfoundland, Canada
    Have you took a notice to how much backlash you have in the rearend. Don't know if this could be your problem.
     
  3. MOLON LABE

    MOLON LABE Registered Member

    Joined:
    Apr 15, 2005
    Posts:
    28
    Likes Received:
    0
    Location:
    Arizona
    I'll look into the backlash issue but best I can tell it's happening up around the yoke and tailshaft housing.
    Anyone else have any ideas ?
     
  4. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

    Joined:
    Jan 18, 2004
    Posts:
    11,030
    Likes Received:
    858
    Location:
    Pinckney, MI
    Check your Tranny mount, as well as your motor mounts. When you put it into gear even with the brake on if the mount is bad it will move and go clank. My mount looked fine, untill I loosened it up and got a good look at it. good luck
     
  5. gone huntin

    gone huntin 1/2 ton status Premium Member

    Joined:
    Oct 25, 2004
    Posts:
    1,706
    Likes Received:
    1
    Location:
    Coldwater, MS
    I have the exact same truck and mine USED to do this. I finally found that dielectric grease (very thick) on the slip yoke splines worked extremely well. Since then I have installed a H.A.D. CV equipped driveshaft and no longer have the problem.
     
  6. MOLON LABE

    MOLON LABE Registered Member

    Joined:
    Apr 15, 2005
    Posts:
    28
    Likes Received:
    0
    Location:
    Arizona
    This is the "fix" I have heard about. Putting grease on the splines at the slip yoke. Thats where my noise is coming from.
    What's the procedure for this operation and is there a prefered brand or type of grease that works best ?
    How long does this work before it clunks again ?
    The HAD CV joint shaft, where can I get info on it ?
    Also, I have heard that GM has a nickel plated yoke that fixes this problem on newer models. Is there a fix similar for the older trucks ?
     
  7. MattK

    MattK 1/2 ton status

    Joined:
    Jan 12, 2005
    Posts:
    1,713
    Likes Received:
    0
    Location:
    Dallas, TX
    depending on which it is, its also possible that there is also slop inside the transfer case.
     
  8. gone huntin

    gone huntin 1/2 ton status Premium Member

    Joined:
    Oct 25, 2004
    Posts:
    1,706
    Likes Received:
    1
    Location:
    Coldwater, MS
    H.A.D. I didn't have anymore clunks after I used the dielectric grease, but due to a vibration, I installed the cv shaft a month later. Personally, I used some Motorcraft dielectric grease just because that's what I had. I used a big flatblade screwdriver and spread the grease out inside the slip yoke.
     

Share This Page