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  1. #11


    If your in 2 wd, the front u-joint should not be a concern.

    I think I'd jack up the front wheel and check for wobble, stiffness etc.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  2. #12
    Jr. Apprentice
    Join Date
    Feb 2011


    Well i was driving yesterday and when it was making the noise/veberation i put in it auto 4wd just to see if it would do anything and when i do the noise and viberation goes away. almost right when i hit the button i can hear it switch over and then it all stops. Any input lol this is kickin my ass

  3. #13


    I had that happen once with a loose exhaust bracket. If it's a "rattle" type vibration, you might check them. It even went away in 4wd, just as you're describing.
    2006 Vortec Max 1500
    -Custom Tune (389HP 440 Ft/lbs Trq - Dyno'd) | Volant CAI | Magnaflow Dual-in/out Exhaust w/3" stainless pipe tips | Fully Built Transmission w/ Red Eagle Clutches & Kolene Steels w/ Corvette Servos and Stage2 Shift Kit | 35K Tranny Cooler | Mobil 1 | Royal Purple Rear Diff
    -Spray-in Bed Liner
    -Premium Sound w/lifetime Satellite Radio | Leather | Sunroof | Heated Seats
    -Limbstriping from USING the truck (those are badges of honor)

  4. #14


    Without going back and rereading all of your posts, have you ever check the fluid level in the front diff?

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