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Mechanic couldnt help....

Discussion in 'Chevy Trucks' started by chcav1218, Mar 13, 2009.

  1. chcav1218

    chcav1218 Senior Member
    Messages: 954

    Ok so I took my truck into the shop because I've been getting some funky vibrations and thumps and such in teh truck on occasion. I figured it was a bearing, ball joint, or a u joint. I checked those things and everything looked ok, so I figured i've have the mechanic take a look, and now he says he cant find anythng. Its usually at high speeds, and I can even feel it in the wheel sometimes. Its even stronger when I have the plow on, but still comes and goes. What do you guys think?
  2. grandview

    grandview PlowSite Fanatic
    Messages: 14,609

    Warped rotor? Driveshaft balance is off?
  3. affekonig

    affekonig Senior Member
    Messages: 909

    Intermediate steering shaft (I shaft). That's your problem.
  4. chcav1218

    chcav1218 Senior Member
    Messages: 954

    ill ask him about those things when i go pick up the truck
  5. CityGuy

    CityGuy PlowSite Fanatic
    Messages: 17,220

    Just a thought but check to make sure the spare tire is tight.
  6. affekonig

    affekonig Senior Member
    Messages: 909

    It's REALLY common and does what you describe.
  7. chcav1218

    chcav1218 Senior Member
    Messages: 954

    ill check the tire but i doubt thats it. yeh i was just doing some reading about those I shaft. It seems like it might be worth looking into
  8. creativedesigns

    creativedesigns PlowSite.com Addict
    Messages: 1,929

    The first thing I do is take that spare tire off a new truck!
  9. chcav1218

    chcav1218 Senior Member
    Messages: 954

    with my luck i'd get a flat the first week out
  10. scottL

    scottL PlowSite.com Addict
    Messages: 1,613

    Ummmm, You wouldn't have the inside scoop by any chance :rolleyes:
  11. 06Sierra

    06Sierra PlowSite.com Addict
    from Maine
    Messages: 1,329

    The I shaft was a big problem on the early 2000 trucks and suvs. My 04 Yukon needs it done. It isn't bad, usually when turning and hit a bump, so I haven't bothered with it yet. For the longest time dealers were just putting more grease in. They finally came out with an updated shaft to replace it.
  12. wirenut

    wirenut Senior Member
    from nh
    Messages: 529

    body mounts....they had an issue there to....:dizzy:
  13. glfredrick

    glfredrick Member
    Messages: 33

    If you had a newer truck, I'd suggest checking the computer (PCM) for upgrades. Trucks newer than 2006 have an electronic tie-in between the brakes and steering that can cause all sorts of weird problems, and most techs out there haven't a clue about that. I've already seen where pushing the brakes can make the steering lock up. In fact, I watched one of the shops I was calling on completely rebuild the steering, suspension, and brakes on an 06 model, and the problem was still there. They took it to the dealer, flashed the PCM and the problem went away.

    On your model, I'd check bushings, especially on the a-arms, ball joints, u-joints, etc. It could also be bad axle or pinion bearings. It wouldn't hurt to pull the diff cover and change oils. I prefer Amsoil synthetic, especially for cold weather and heavy duty use. Lots of bad gear sets on those trucks.
  14. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,525

    They make several updated steering shafts to fix the clunk felt in the steering wheel.

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,362

    I've had 3 shafts put in the 06' and 1 in the 07'. The 06' only really needed 2 shafts because the third time it ended up being the column bearing, have your mechanic check the TSB's there are a few for clunks.
  16. glfredrick

    glfredrick Member
    Messages: 33

  17. Burkartsplow

    Burkartsplow PlowSite Veteran
    Messages: 3,246

    I had the steering shaft replaced last year. $110 an done. I could feel a wiggle and hear a rattle when I drove or hit bumps. All better now. But my buddy had a a noise up front and thought it was the hubs. they replaced them and it took care of the vibration but there was still a noise and it was a warped front rotor. Like everyone else said it probably one of those two things. good luck.
  18. Russ's Repair

    Russ's Repair Junior Member
    from 02562
    Messages: 10

    just a thought but it could also be a slipped belt in a tire
  19. crossboneracing

    crossboneracing Senior Member
    Messages: 137

    Did you check the idler and pitman?