1. Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Wierd Sound from LLY

Discussion in '04.5-05 LLY' started by WPatrus, May 11, 2008.

  1. WPatrus

    WPatrus Flunky

    27
    0
    May 11, 2008
    Georgia
    My LLy in my sig has been making a strange sound when at idle (normally at stoplights or when reaching destination.

    It sounds like an old alarm clock, with the ringing sound. It is not over powering but it can be heard clearly at idle over the engine and exhaust. The sound seems to be coming from the passanger side of the engine towards the back around the transmission. I can't seem to pinpoint it more that that though. It's a bad rattle thats more annoying than anything. Everything runs fine and it has not performance issues. I also can't hear the sound when I am on the throttle but that doesn't mean its just not being overpowered by the engine then.

    Long Post, sorry - I tried this question over on the old site but I never got a response - anybody have any ideas here? Just a shot in the dark I know.

    THanks anyway.
     
  2. BudTX

    BudTX Edjumacated Redneck

    Are you sure that it is not more of a pump type noise? The pump on your Allison can be audible.
     
  3. mattydmax

    mattydmax Recruit

    There is also an exhaust shroud between the downpipe and body if I remember. Haven't been underneath for a while. My wife's Suburban had a loose shield and it sounded alomost like a ringing/rattling noise. Sometimes something loose like that can give off some strange sounds. Kind of tough to diagnose the noises over the internet.
     
  4. tomrex

    tomrex Professional Idiot

    X2 on the exhaust. Stick your foot on the tailpipe and see if it goes away.
     
  5. tomrex

    tomrex Professional Idiot

    When all else fails, kick the m'fer.
     
  6. WPatrus

    WPatrus Flunky

    27
    0
    May 11, 2008
    Georgia
    I have duel MBRP's so it's hard to cover it up to see if it rattles that way. But I will climb up under it and try to find that heat shroud. That sounds kinda like it might be the culperate but I'll let you know.

    THanks guys
     
  7. Golddigger

    Golddigger New Member

    154
    0
    May 11, 2008
    Northern Utah
    When I put my aftermarket exhaust on I had a ringing at idle. It was those annoying washers that go on the hangers dancing around.
     
  8. jcool

    jcool #78 A(ACLU) FNG

    1,097
    0
    May 4, 2008
    Richlands, NC
    put on some gloves and tighten everything down while its hot.
     
  9. WPatrus

    WPatrus Flunky

    27
    0
    May 11, 2008
    Georgia
    I just got finished working on it now. I took off the wheel well liner and tightened the shroud and heat shield near the down pipe. I tapped it with a rubber mallet and found that is where the sound was coming from. I guess the test will be the ride. I'll let ya know if it comes back.

    Jcool I see your from Jacksonville - I'll have to look you up next time I am up that way. I am from Wilmington / Wallace originally and have family strung all around the area (it's still home ya know).
     
  10. WPatrus

    WPatrus Flunky

    27
    0
    May 11, 2008
    Georgia
    Little update on the rattling. It's gone! MattyDmax was right - It was the loose shield. In particular it was rattling on the downpipe.

    Thanks again guys
     
  11. BudTX

    BudTX Edjumacated Redneck

    I am glad that you got it figured out.
     

Share This Page