Adjusting the Guitar Truss Rod – Step-By-Step DIY Guide

The guitar rod is a crucial component of your guitar’s anatomy. It is responsible for adjusting the string tension and action, and for keeping the strings in the correct position. A properly adjusted guitar rod will result in a guitar that is easy to play and sounds great.

There are two types of guitar rods: truss rods and tension rods. Truss rods are located inside the neck of the guitar, and are used to adjust the neck’s curvature. Tension rods are located at the bridge, and are used to adjust the string tension.

Truss Rod Guitar


A truss rod is a tuning rod in acoustic and electric guitars. It is a necessary component to keep the neck straight and prevent it from bowing or warping. The truss rod is located inside the guitar neck, running along the length of the fretboard. It is usually adjusted using a nut or wheel at the headstock end of the guitar.

The truss rod is adjusted by loosening or tightening the nut or wheel. This will cause the truss rod to either loosen or tighten, depending on which way the nut or wheel is turned. The truss rod is usually adjusted in very small increments, usually no more than a quarter of a turn at a time.

The reason for adjusting the truss rod is to either relieve or create a neck bow. If the neck is too bowed, the strings will be too high off the fretboard and will be difficult to play. If the neck is too straight, the strings will buzz when played. The goal is to find the happy medium where the strings are close to the fretboard but do not buzz.

Acoustic guitar lies on the carpet

How to Understand When a Truss Rod Needs Adjustment?

If your guitar’s truss rod needs adjusting, you’ll likely notice some changes in the way your guitar sounds and feels. The truss rod is responsible for counteracting the tension of the strings, so if it’s not properly adjusted, your strings will either be too loose or too tight. Here are a few signs that your truss rod needs adjusting:

1. Your guitar’s action is too high or too low.

If your strings are too close to the fretboard, your action is too low. This can cause your strings to buzz when you play. On the other hand, if your strings are too far from the fretboard, your action is too high. This can make it difficult to press down the strings.

2. Your guitar’s neck is bowed or warped.

If your guitar’s neck is bowed or warped, likely, that the truss rod is not properly adjusted. This can cause your guitar to sound out of tune even when you tune it correctly.

3. Your guitar’s intonation is off.

If your guitar’s intonation is off, it means that the strings are not being fretted at the correct position. This can cause your guitar to sound sour or tinny.
If you notice at least one of these signs, it is worth adjusting the truss rod.

Truss Rod Adjustment

Most guitar manufacturers include a truss rod tool with the guitar. If not, a regular wrench or socket will suffice.

Step 1

Before making any adjustments to the truss rod, it is important to first loosen the strings. The strings should be loosened to the point where they can no longer be tuned. This will prevent the strings from putting pressure on the neck while the truss rod is being adjusted.

The guitar is on the couch

Step 2

Once the strings are loosened, the nut or wheel at the headstock end of the guitar can be turned. As mentioned before, the truss rod is usually adjusted in very small increments. It is important to go slowly and make sure that the truss rod is not being turned too much at once.

Step 3

After the truss rod has been adjusted, the strings can then be returned to the proper pitch. And that’s it! The neck should now be straight and the strings should be buzz-free.

Replacing a Truss Rod

A truss rod is an essential part of most guitars, and to be replaced, it’s a pretty simple process. It needs to be replaced if it is bent, damaged, or otherwise not functioning correctly. Here’s how to do it:

  1. First, remove the strings from the guitar. This will make the process a lot easier and prevent any damage to the guitar.
  2. Next, locate the truss rod cover. This is usually on the headstock, and it will have a screw or two holdings it in place. Remove the cover and set it aside.
  3. Now, you should be able to see the truss rod itself. It’s a long, thin piece of metal that runs along the length of the neck.
  4. Using a truss rod wrench, loosen the nut that’s holding the truss rod in place. Be careful not to loosen it too much, or the truss rod could come out entirely.
  5. Once the nut is loosened, you can remove the old truss rod and replace it with a new one. Make sure to put the nut back on and tighten it securely.
  6. Finally, put the truss rod cover back in place and screw it in place. You’re now ready to put the strings back on and tune up your guitar!


What are some things to keep in mind when adjusting a truss rod?

Some things to keep in mind when adjusting a truss rod are to avoid over-tightening the truss rod, which can cause damage to the neck of the guitar, and to make sure that the truss rod is properly lubricated.

What are the consequences of an improperly adjusted truss rod?

If a truss rod is not properly adjusted, the neck of the guitar will not be able to hold the correct amount of tension, which can lead to the neck warping over time. This can cause the strings to buzz, the action to be too high or low, and intonation issues.

What can cause a truss rod on a guitar?

The most common cause of a truss rod on a guitar is when the neck is bent too far. This can happen when the guitar is dropped or when the strings are tense too much.

How to fix a bowed guitar neck without a truss rod?

Try to loosen the strings and see if that helps. If the neck is still bowed, you can try to put a shim under the strings at the bridge. If none of these things work, you will need to take the guitar to a luthier to have the neck reset.


I can say that the adjustment of the truss rod is mandatory when changing the tension of strings. The change of the tension causes a change in the scale length of the guitar, and therefore, the truss rod has to be adjusted to compensate for the change in the scale length.

Otherwise, the guitar will not be in tune.

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