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Thread: Driveline Clunk

  1. #1

    Default Driveline Clunk

    Whenever I pull off from a dead stop I'm hearing a clunk, sort of like a loose u-joint. If I pull off real easy I don't hear it. I've been told that it's a common problem and that lots of um do it and it's nothing to worry about. It's just annoying and I wish it wasn't there. It's a 03 Silverado Z71 5.3 ext. cab. Anyone experiencing this?

  2. #2

    Default

    It could also be a rearend clunk, though on an 03 I wouldn't expect that yet. On my 91 suburban the rear-end clunks whenever I put it in gear. There's some slack in the gearset and the clunk is the transmission simply taking up that slack. Is that bad? Probably. Is it an immediate worry? Probably not.
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 265K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

    Remember kids, the only difference between screwing around and science is writing it down- Adam Savage

  3. #3

    Default

    check your u joints, is it more of a metallic ping sound, if so mine does it two and my old truck did it even after replacing the u joints

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  4. #4

    Default

    Does your rear driveshaft have a slip yoke in it? That's another common source of clunks.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  5. #5

    Default

    x2 .... U-Joints or drive line lash. Any play in your drive shaft when parked?
    02 Chevy Suburban 1500, 4:10 Difs, Stock for now.

    02, CC, LB, 4x4, LB7, 145K Miles, EFI Live Tuned by Nick at Duramaxtuner, Banks Ram-Air w/ superscoop (Plate Removed), Banks Big Head, AirDog 100, Pillar Gauges, 16x8 Eagle wheels, 285 BFGs, Bilstein 5100's, Ride Rite Air Bags 5" Exhaust, 4" downpipe, Prodigy Brake Controller, Goose Neck.

    02 Grand Prix GT.

  6. #6
    Sr. Apprentice lube70's Avatar
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    Default its the

    slip yoke on these trucks, gm has a fix via a tsb to file down a tooth or two to stop this annoying clunk..

  7. #7

    Default

    My truck does the exact same thing. At first I thought it was drive-line related, but after going to a parking lot and doing it over and over I noticed it's in the steering wheel. I would feel it a bit in hte pedals, but not as "hard" as in the steering wheel. I saw a thread on the forums with great photo's showing how to lube the steering shaft. I've just been waiting for some better weather to get out there and see if that corrects the problem.
    Paul- Maine
    2007 Classic Silverado
    Crew Cab Z-71
    5.3 Flex Fuel V8
    24' Antigua Travel Trailer

  8. #8

    Default

    Thanks for all the suggestions. I've been told it's the slip yoke but maybe it's in the steering like yours is. I'll check it out.

  9. #9
    Legend bry2500's Avatar
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    Default

    Same problem here. I'm betting on the slip yoke. I'm gonna check it today. I'll update when I find the issue.
    BRYAN

    "IF YOU DON'T TREAT IT LIKE A TRUCK IT'S JUST A REALLY BIG CAR"

    02' Avalanche 2500 Onyx Black
    8.1L Vortec
    43,000 miles

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