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  1. #1

    Default Transfer case noise

    Im new to the forum and I have a 2010 z71 with 102000 miles it has a clunk in the transfer case from what I can tell by turning the drive shafts. Any help would be appreciated.

  2. #2


    It may not be the transfer case, it could be a u joint. Do you know which transfer case you have? Is it an NP4? Np8? The rpo code list in the glove box should tell you.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3


    Should I be looking for those letters and numbers or is it a code?

  4. #4

  5. #5


    The closest I saw was np5, it was in with all the other sets of letters and numbers on a sticker. I also checked the u joints there ok checked the slip yoke and lubed it with no change.

  6. #6


    Welcome to the club, it's great to have you aboard.

    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  7. #7


    NP5 is a leather wrapped steering wheel.
    NP1 Transfer Case, Electric Shift Control, 2 Speed

    NP2 Transfer Case, Manual Shift Control, 2 Speed

    NP3 Transfer Case, All-Wheel Drive

    NP5 Steering Wheel, Leather Wrapped

    NP8 Transfer Case Active, 2 Speed Push Button Control

  8. #8


    check for it to be stamped or on a tag on the transfer case as well.
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  9. #9

    mfleetwood's Avatar
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    Jul 2010
    Denver, CO
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    Welcome to the Club!!!

    ****Moved thread to correct section****

    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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