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  1. #1

    Default 1992 Suburban K1500 under vehicle whine that starts about 10MPH and gets worse

    Where to begin... I have replace the front wheel bearings, real axle shafts and bearings, and just rebuilt the transfer case. The reason for the latter was that when I put the truck in 4WHi, the noise stops. This started out very quiet and has continued to get more persistant. Initially you could let up on the gas pedal and it would go quiet. Ready to park this one in a canal, so please help if you have a recommendation. Had the rear end checked and they also checked the pinion bearing.

  2. #2
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    murdog94's Avatar
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    Anyone take a look at the front driveshaft U-joints? or the ujoints in general?
    Mike

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  3. #3

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    U joints are all new and cool to the touch after driving.

  4. #4
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    Sounds like it could be a bad powersteering pump or a noisy tranny pump... otherwise if everything else has been checked those are really the only other things.

  5. #5
    Sr. Mechanic Ethan's Avatar
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    Sounds like you didn't put the 2 wheel high part of the transfer case back together right, prolly the bearing for the syncro or whatever it has, if it goes away in 4 wheel high, but is present in 2 wheel drive, then it has something to do with the 2 wheel high part of your transfer case, which should just be direct drive and bypassing the gear that drives your front axles. I would pull it apart and check all your clearances with a fine tooth comb.
    1994 Chevy Silverado 1500 Ext Cab 350 cuin TBI in dark Chevy blue
    160,000+ miles
    Original paint
    Original interior
    Original engine and tranny
    wrecked twice stolen once
    Diamond Plate bed rails
    Power windows
    Original Alloy wheels
    Original fancy smancy cup holder
    Tow package
    Original plastic bed liner
    K&N Cone Air Intake
    Dual MagnaFlow exhaust(not true dual) with chrome tips
    MSD Street Fire Performance Ignition coil

  6. #6

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    Took to a second shop and found that the ring and pinion were bad. I've got to admit that this truck is frustrating!

  7. #7
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    Quote Originally Posted by clhaggett View Post
    Took to a second shop and found that the ring and pinion were bad. I've got to admit that this truck is frustrating!
    Just curious, how many miles on this truck??
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  8. #8

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    X2 what stephan asked.
    :cool:

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.
    :glasses:

  9. #9

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