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  1. #1

    Default Drive train slop??

    Hey fellow GM truck owners,

    I have a 1999 Silverado X-cab 2WD LS (not classic). Whenever I accelerate from a stop I get a pretty good "klunk" in the drive line. I used to have a 1993 Silverado X-cab 2WD that did the exact same thing. I spent a lot of time and money trying to solve it, new motor/tranny mounts, Transmission and rear end service. Even had it looked at by the dealer and a chevy truck tech and never figured it out. I had the 1993 for 7 years and it never got better or worse. I've had the 1999 three years now and same thing since I got it. There does not appear to be anything wrong with the transmission or rear end.

    Anyone I know with a full size GM say they do not have this problem but they either have 4WD or reg-cab (no carrier bearing and slip shaft only on 2WD X-cab). 2WD Suburban may have same set up, not sure.

    Does anyone have any ideas or first hand experience?? I don't wanna just start throwing money at it

    I am thinking maybe the slip shaft?? between the carrier bearing and the rear end of the drive shaft.

    Thanks,
    JM
    1999 Chevy Silverado LS X-cab
    - 5.3L, K&N CAI, 3" Single Magnaflow & 4" tip
    2000 Chevy Camaro RS
    - Edlebrock 3" cat-back duals, K&N drop-in, MSD Super Conductors.
    2005 Chrysler T&C Limited
    - None (duh, it's a mini-van)



    Tim "the tool man" Taylor is my hero

  2. #2

    Default

    Lube the slip shaft up real good and see if anything changes, this has been a problem on these trucks in the past.

  3. #3

    Default

    I did do that on my '93 and it made no difference. Can the slip shaft be rebuilt?

    JM
    1999 Chevy Silverado LS X-cab
    - 5.3L, K&N CAI, 3" Single Magnaflow & 4" tip
    2000 Chevy Camaro RS
    - Edlebrock 3" cat-back duals, K&N drop-in, MSD Super Conductors.
    2005 Chrysler T&C Limited
    - None (duh, it's a mini-van)



    Tim "the tool man" Taylor is my hero

  4. #4

    Default

    Can anyone point me to more info on this issue??

    Thanks,
    JM
    1999 Chevy Silverado LS X-cab
    - 5.3L, K&N CAI, 3" Single Magnaflow & 4" tip
    2000 Chevy Camaro RS
    - Edlebrock 3" cat-back duals, K&N drop-in, MSD Super Conductors.
    2005 Chrysler T&C Limited
    - None (duh, it's a mini-van)



    Tim "the tool man" Taylor is my hero

  5. #5
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,356

    Default

    i would say u-joints or the rear yoke
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  6. #6
    Legend Mean_Green_95's Avatar
    Join Date
    Apr 2009
    Location
    Baton Rouge, Louisiana, United States
    Posts
    1,170

    Default

    I believe GM has a special lube for the slip shaft. I've read threads that say the special lube really does help. Also, your u-joints might be going.
    2010 Equinox LT
    2.4, 6 speed auto, power lift gate, remote start, bluetooth, xm.

    1995 Cheyenne C1500 ext. cab(my baby, my first truck)
    5.0, 5 speed, Silverado appearance package, power nothing, bucket seats and console Silverado, painted black interior, eBay halo headlights, eBay chrome tails, eBay cai, dual Flowmaster 40's w/no cats, 15x7 American Racing Hopsters, Walmart fog lights, SS mirrors

  7. #7

    Default

    Checked U-joints and rear end yoke, no slop. Sounds like I heard of the "special" lube before, anyone know the specifics??

    JM
    1999 Chevy Silverado LS X-cab
    - 5.3L, K&N CAI, 3" Single Magnaflow & 4" tip
    2000 Chevy Camaro RS
    - Edlebrock 3" cat-back duals, K&N drop-in, MSD Super Conductors.
    2005 Chrysler T&C Limited
    - None (duh, it's a mini-van)



    Tim "the tool man" Taylor is my hero

  8. #8

    Default

    A while back someone was mentioning a different yoke that GM was using to stop problems like this. There was a post on it but I cant seem to find it right now.

  9. #9
    Jr. Engineer Gmcsuvguy's Avatar
    Join Date
    Dec 2007
    Location
    Alberta, Canada
    Posts
    279

    Default

    There was an updated slip yoke for awhile and then GM came out with their special lube, I don't have the part # but if you go into your local dealer they will have it..or can find it for you. The tin that the lube comes in will do a few vehicles.
    Ken Beida
    2010 GMC Sierra Crew Cab 4X4, 5.3L
    2009 GMC Sierra Denali, 6.2L = 403hp, AWD, Full load

  10. #10

    Default

    yeah i know what your talking bout my truck does the same thing and i also have a buddy with the same truck and his does it as well. when i took mine to the dealer they put that special lube in and it quit for a while but it started back after a while. Which they told me it would, but anyways they told me it wont hurt nothin and the only way to fix it is but a axle yoke made of nickel yoke. at my local dealer its 250. so i said piss on that ill deal with the noise.
    03 silverado ls model x-cab z71 w/ 5.3l.
    black lo pro toolbox
    ruff country leveling kit
    285/70/17 tera tracs
    stock 17's that are rhino lined
    5% tint

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