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  1. #1
    Jr. Apprentice Harwood103's Avatar
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    Default Need help finding a vibration.

    I have a Flowmaster muffler with duel turn downs just behind the cab. I have a vibration that is new and driving me crazy. It was always a little noisy, but not like this. I took out my tool box in the back thinking it was that and it didn't stop. I can't seem to find anything loose, so I don't know if the cat converter is going or the muffler itself or what? Any suggestions would be much appreciated.

  2. #2
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    murdog94's Avatar
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    Default

    Year, make, model, motor, trans etc would be helpful please.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3
    Jr. Apprentice Harwood103's Avatar
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    Default

    Wow, I guess that would help. I have an 04 Silverado with a 5.3 V6. All stock.

  4. #4
    Sr. Engineer
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    Default

    Probably where you turned down behind the cab ..getting vibration in between bed and cab..runem all the way out sounds better.

  5. #5

    Default

    depending on what flowmasters you chose will depend on how droney they are. flowmasters are also know as and dont get mad when i say this is (dronemasters) sound good but vibrate and make tons of droney bass. try a magnaflow. still good sound but do not vibrate and drone. take it from a guy thats had 3 mustangs and one current truck with infamous sets of flows. my truck currently has a nice drone/vibe to it. also try a turbo muffler. it only sounds deep like a 2 chamber muffler at idle but quiets down on rpm increase.

    ---------- Post added at 02:16 AM ---------- Previous post was at 02:15 AM ----------

    also chech the rubber mounts that hold exhaust up if any. if one broke lose you would have a moving muffler. more rpm means more vibration until finally it acts like a musical chime under there.

  6. #6
    Master Mechanic
    AMac's Avatar
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    Default

    I had a magnaflow on my '09 Sierra drone wasn't too bad. I just got the 40 series flowmasfer on my Silverado and it too is also not that bad. I think the AFM makes it a little noisy at times though regardless of exhaust manuf.
    I also don't listen to the stereo much but when I do, the exhaust is even less noticeable.

    ---------- Post added at 03:14 AM ---------- Previous post was at 03:09 AM ----------

    Did you install the exhaust yourself? I know on my 09'sierra I think it was the collar or a connection piece that was loose so it made a rattling sound. If you thought it was your toolbox it makes me think the noise your hearing is also rattling like. Have you gotten underneath the truck and checked it out?? Anything loose or bumping up against something else??




  7. #7
    Jr. Apprentice Harwood103's Avatar
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    Thanks for the suggestions. I think i'm going to run it all the way back instead of the turn downs. Yes, I did get under there and checked, but didn't see anything. I will crawl under there again when I have more time to investigate. Thanks again.

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