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Thread: Truss Rod Snapped?

  1. #1

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    Truss Rod Snapped?

    Yesterday, while changing strings on my 2019 SbMM LK100 in the manner I have used for 45 years on guitars of multiple brands (taking all strings off, clean neck, restring), I heard a very distinct yet quiet "click". This gave me pause as it wasn't clear what caused it. As I also changed out the super switch, I put one string on to make sure the wiring was correct.

    That is when I noticed that the string was laying on the first 3-4 frets and the neck had a clear dip at the nut end. I checked the truss rod with the EBMM tool and the truss adjustment wheel had an inch of play (looking at the end of the tool not in the wheel).

    Using my Neck Check gauge, there is a distinct dip starting at the 5th fret...I am assuming the truss rod either snapped or let completely loose some how. I have never adjusted the truss rod on this particular guitar, but have on some of my other EBMM/SbMM guitars.

    Any thoughts?

    Can I replace the truss rod alone? You can actually hear it moving inside the neck.
    Last edited by kingdoublecut; 05-09-2021 at 12:05 PM.
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

  2. #2

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    Contact SBMM customer service on that one.... might need a new neck.
    Balls are Best!!

  3. #3

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    I have sent an email today. Not real hopeful about a replacement...
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

  4. #4

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    Usually you would really need to force into a truss rod nut to break it. Just taking strings off shouldn't do anything at all. I would start by tightening the truss rod adjuster and see if it works at all. It may just be so loose that it's moving around a bit.
    Forum Moderator, Guitar Teacher and Guitar Tech, Folder of Underpants, Stubber of Toes.
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  5. #5

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    After a full rotation in both directions, the adjustment wheel tightened backup and the neck straightened out. Guess I'll throw it back on the body, string it up and see what happens...
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

  6. #6

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    Awesome! I think you'll be good to go!
    Forum Moderator, Guitar Teacher and Guitar Tech, Folder of Underpants, Stubber of Toes.
    Irish/American in Paris

    Silhouette Special (2005 Buttercream Limited Edition)
    Cutlass HSS (2018 Roasted Special, Ivory White)

    Click here for my Music Man photo albums


    Ernie Ball Customer Service
    Music Man Customer Service


  7. #7

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    Is it ok now?
    Just because you're paranoid doesn't mean they're not after you.

  8. #8

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    Similar thing happened with one of my JPs. It was overdue for an adjustment and when I went to set it up the truss wheel had no resistance in either direction. Customer service said it is possible for it to bind up inside the neck depending on conditions and to try putting slight pressure on the neck to see if it gives. Sure enough as soon as I gave the neck a slight wiggle I heard that same sort of "click" and voila, truss adjustment was back to normal. That was 3 years ago... has not happened since and is still the best playing guitar I own.
    Current EBMM Guitars:
    2012 JPXI-7
    2014 JP6 BFR Koa
    2018 Valentine
    2018 JP15 BFR Eminence Purple

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  9. #9

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    Neck still gauges straight two days later - not mounted to body. I'll put it together tomorrow and let you know...
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

  10. #10

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    I am just completely amazed... I have re-necked and strung up my guitar and it is better than ever before. Lower action, no buzzes whatsoever...just weird, but I'll take it.
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

  11. #11

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    Not that it makes any difference, but this is a 2019 LK100 neck on a 2017 LK100D. I swapped necks when I modded the 2019 to HSH. Had I known how few of the LK100D models were out there (based on seeing only 3-4 in three years on Reverb) I wouldn't have swapped necks.
    2013 SbMM AX30D Natural Quilt Maple (1 0f 1 2008 Prototype)
    2014 SbMM JP100D BKOA Vintage Burst/Koa FOR SALE
    2015 SbMM JP100D MKOA Vintage Burst/Koa FOR SALE
    2005 EBMM Axis Super Sport Rosewood Top/Rosewood Neck - Hardtail
    2019 SbMM Albert Lee - Trans Walnut...Now Olympic White - HSH Mod - Dimarzio Virtual PAF/FS1/Virtual PAF
    2017 SbMM LK100D LUKE - Black Metallic - Stock - Dimarzio Transition pups - Now has Liquifire/Crunch Lab set

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