makita xfd131 drill making a weird clicking noise when i pull the trigger, not drilling. battery's charged.

Diagnosis

The clicking noise you are hearing in your Makita XFD131 is typically the sound of the trigger switch engaging the motor, but the mechanical transmission failing to transfer that rotation to the chuck. This is most often caused by a "half-engaged" forward/reverse slider. If the slider is positioned even a millimeter away from the full lock position, the internal drive gear cannot mesh with the planetary gear set, resulting in a rapid clicking or rattling sound as the motor spins without grip. Alternatively, if the slider is fully engaged, the noise indicates a failure in the planetary gear assembly or a stripped clutch. In the XFD131, the torque adjustment ring controls a series of spring-loaded balls and notches; if the internal clutch spring has snapped or the gear teeth have sheared due to overloading, the motor will spin the internal drive shaft, but the clutch will "slip" continuously, creating a repetitive clicking sound. You can confirm this by switching the tool to the "Drill" mode (the drill bit icon); if the clicking stops and the tool drills, your clutch mechanism is stripped. If it still clicks in drill mode, the failure is deeper in the transmission gears.

How to Fix It

Follow these steps in order to isolate and resolve the mechanical failure:

1. Reset the Directional Switch: Firmly push the forward/reverse slider all the way to the left or right. Do not leave it in the center "neutral" position. If the slider feels loose or "mushy," use a can of compressed air to blow out any drywall dust or metal shavings trapped in the slider track that may be preventing full engagement.
2. Verify Torque Setting: Rotate the torque adjustment ring to the maximum numerical setting (usually 16 or 20 depending on the specific sub-model). Pull the trigger. If the clicking disappears, the issue was simply a low torque setting causing the clutch to trip under the weight of the bit.
3. Test the Drill Mode: Rotate the torque ring fully counter-clockwise until the drill bit icon is aligned with the indicator mark. This bypasses the clutch entirely. Pull the trigger. If the tool now rotates without clicking, the planetary gear is intact, but the clutch assembly is damaged.
4. Battery Contact Cleaning: Remove the 18V LXT battery. Use a cotton swab dipped in 90% isopropyl alcohol to clean the three copper terminals on the battery and the corresponding pins inside the drill housing. A poor connection can sometimes cause the motor to "stutter," which sounds like a mechanical click.
5. Chuck Clearing: Unscrew the chuck completely by hand to ensure no debris is jammed in the spindle. Re-insert a standard 1/4" hex bit and tighten it firmly to ensure the noise isn't simply a loose bit spinning inside the chuck jaws.

If That Didn't Work

• Replace the Forward/Reverse Switch Assembly: If the slider is physically broken or doesn't "click" into place, the internal plastic cam may have snapped. You will need to disassemble the housing and replace the directional switch assembly. This is a common failure point if the tool has been dropped while in the neutral position.
• Inspect the Planetary Gear Set: If the noise persists in "Drill" mode, the internal planetary gears have likely stripped. Open the gear housing and check for metal shavings (silver "glitter") in the grease. If found, the gear set must be replaced as a complete unit; attempting to replace a single gear usually results in misalignment.
• Check the Motor Commutator: If the clicking is accompanied by sparks from the motor vents, the carbon brushes may be worn down to the limit. This causes intermittent electrical contact, creating a "stuttering" sound that mimics a mechanical click. Replace the carbon brush set if they are worn below 5mm.
• Test with a Different LXT Battery: Use a known-working 18V battery. A cell failure in a high-capacity battery can cause the tool to trip its internal electronic protection circuit rapidly, which can sound like a repetitive clicking or pulsing.

Heads Up

• Avoid Neutral Triggering: Never pull the trigger while the forward/reverse slider is in the middle position; this can wear down the trigger switch contacts and cause electrical arcing.
• Grease Maintenance: Every 6 months of heavy use, inspect the gear housing. If the grease has become contaminated with sawdust, it will increase friction and lead to the gear stripping you are currently experiencing.
• Overload Warning: If you hear the clutch clicking during a drive, stop immediately and increase the torque setting. Forcing a drill through a "clicking" clutch will permanently strip the internal notches.
• Battery Storage: Store your LXT batteries in a cool, dry place. Extreme heat can warp the battery casing, preventing the battery from seating fully and causing intermittent power delivery.