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Grinding noise after lift

Discussion in 'Suspension' started by 90YotaPU, Nov 12, 2011.

  1. Nov 12, 2011 at 2:43 PM
    #1
    90YotaPU

    90YotaPU [OP] The Messiah

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    Guys I put an aal in and put the 5100's up to 2.5 and now it pulls to the left (think this may be the wheels an tires cause I just had it aligned to spec). I also have and grinding noise when I am up above 60 and let off the gas. Noise goes awAy when it drops back down below 50 or 60. Any one have this? Put in axle shims and it helped with vibes but I still have these issues. Thanks.
     
  2. Nov 13, 2011 at 8:40 AM
    #2
    Bogg

    Bogg Well-Known Member

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    I have a grinding noise when turning left with steering wheel cranked all the way. But only left, no noise turning right. Also have a vibe around 40mph. Goes away once I exceed 40 or slow down. Wonder if a diff drop would help this? Maybe an alignment issue?
     
  3. Nov 13, 2011 at 10:06 AM
    #3
    pataco

    pataco Well-Known Member

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    seems its a 50/50 chance to get the vibes.i have them (30 to 40 mph)and tried everything to get rid of them.now have 40,000+ on it since the lift with no problems.its frustrating to take a very smooth running truck and get the vibes but i dont hardly notice it now.good luck
     
  4. Nov 14, 2011 at 5:55 AM
    #4
    90YotaPU

    90YotaPU [OP] The Messiah

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    Had the aligent done so it's not that and it was done by a shop that's managed by one of our members so I know its right. Probably going back to stock. Too many issues and not enough reward IMO.
     
  5. Nov 14, 2011 at 7:00 AM
    #5
    chadderkdawg

    chadderkdawg Don't ask questions you don't want the answer to..

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    Did to you get UCA's? Without those, it's not going to be perfect... and quite honestly, you have to expect that when you change a stock suspension, its not going to be "stock" anymore... Everyone who lifts has at least one new shimmy, shake, or vibe.... It's just part of the game.
     
  6. Nov 15, 2011 at 5:33 AM
    #6
    90YotaPU

    90YotaPU [OP] The Messiah

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    Haven't done the ucas. I definitely expected the vibes but the grinding noise is a little concerning. Don't want to have to replace the driveshaft or rear end in a year.
     
  7. Nov 15, 2011 at 6:18 AM
    #7
    chadderkdawg

    chadderkdawg Don't ask questions you don't want the answer to..

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    Can you tell if the noise is coming from the front or back?
     
  8. Nov 15, 2011 at 6:22 AM
    #8
    90YotaPU

    90YotaPU [OP] The Messiah

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    It sounds like it is coming from right behind the cab. Being it's a regular cab I suspect its either the slip yoke or the angle of the front ujoint. The front joint doesnt look it's at a bad angle though. Not sure if not having a carrier bearing is helping or hurting in this case. Lol
     
  9. Nov 18, 2011 at 7:50 PM
    #9
    Bogg

    Bogg Well-Known Member

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    I'm wondering if the rear is what is causing my vibration/grinding noise. Really bad around 60km/h. Seems to, for lack of better terms, be in phase harmonically at 65km/h and sounds like a growl. However, I have not installed my carrier bearing drop yet.
     
  10. Nov 19, 2011 at 7:46 AM
    #10
    90YotaPU

    90YotaPU [OP] The Messiah

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    That may help you out being it's essentially cutting your driveline in half. Unfortunately (or fortunately, I'm not really sure) the regular cabs don't have a carrier bearing so I don't have that option. Good luck.
     
  11. Nov 19, 2011 at 7:54 AM
    #11
    bendbolden

    bendbolden Come and take them.

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    OP I have the same exact problem. I am pretty sure it is coming from the front U-Joint. I can feel it through my gas pedal sometime. I believe the reason it happens when you let off the gas is because the nose is diving down changing the angle. I can tap the gas on mine at around that speed and it will do it. I sounds bad but I read someone else on here having that problem(reg cab) and the dealer told him there was nothing he could do. I believe it has something to do with the short frame of the reg cabs.
     
  12. Nov 19, 2011 at 7:57 AM
    #12
    bendbolden

    bendbolden Come and take them.

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    Also I removed my sway bar but with it lifted that high with stock UCA's I noticed it will kind of steer whichever way the road or the pothole you hit is. I believe even a stock vehicle does this but it's not nearly as noticeable. Like others have said that's the price you pay for leaving stock. Also you said yours sounds like from behind the cab?? I guess it could be the rear U-Joint on yours.
     
  13. Nov 20, 2011 at 4:07 PM
    #13
    90YotaPU

    90YotaPU [OP] The Messiah

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    Mine sounds like it's right beneath the seat (that should be where the transfer case meets the driveshaft). I meant to take a look at it this weekend but just didn't get to it.
     
  14. Nov 20, 2011 at 5:23 PM
    #14
    Bogg

    Bogg Well-Known Member

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    CB drop helped the vibe/shudder at 100km/h but the vibe at 60km/h still exists. I'm hoping it's just an alignment issue as I haven't had an alignment yet since my lift. I have read somewhere that in some cases it's the brakes. Heard of anything like this?
     
  15. Dec 4, 2011 at 7:06 PM
    #15
    90YotaPU

    90YotaPU [OP] The Messiah

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    Ok, so here's an update. Today I took the AAL off and the vibes and grinding noise went away. What's really wierd is that my front Bilsteins are still at 2.5 but I'm sitting just about perfectly level according to my 4' level I placed on the bedrail of the truck.
     
  16. Dec 5, 2011 at 2:51 AM
    #16
    chad68

    chad68 Master Jedi Member I am...

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    The grinding noise you here is a normal/common occurance on lifted reg cabs. I started a thread on it a couple years ago. Once your speed drops below about 50, it goes away during deceleration or coasting in gear (engine braking).

    Taking the driveline out and flipping it end to end suppsoidly makes the noise go away. Either it goes away or it moves the noise far enough behind the cab that you can't hear it anymore.

    I've had the noise for 46,000 miles and have no plans to do anything about it.

    The noise went away with the AAL removed because the angle went back to stock. If you throw a few hundred pounds of weight with your AAL in, the noise should also go away, as the weight puts it back to stock rear height.
     
  17. Dec 5, 2011 at 6:28 AM
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    bendbolden

    bendbolden Come and take them.

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    I was just about to say that. I loaded mine down yesterday and it almost went away. I will have to look at flipping the driveline.
     
  18. Dec 6, 2011 at 8:48 AM
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    01Yota

    01Yota Well-Known Member

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    Do you still get the bodies if you install a full kit like new leafs in the back not a aal
     
  19. Dec 6, 2011 at 8:49 AM
    #19
    01Yota

    01Yota Well-Known Member

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    Not bodies sorry sounds damn predict text
     
  20. Dec 6, 2011 at 8:51 AM
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    chadderkdawg

    chadderkdawg Don't ask questions you don't want the answer to..

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    wut
     
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