5 Signs Your Truck’s Gearbox Needs Inspection

For any truck driver, a properly functioning gearbox plays a crucial role in ensuring the vehicle’s overall performance.
But how can you tell if something’s wrong with it?
Here are 5 key signs that often indicate your truck’s gearbox needs diagnostics or repairs.

1. Hard or delayed gear shifting
If your truck struggles to shift gears, the gear gets stuck, or there's a noticeable delay during shifting, this is often a first warning sign of internal issues.
In manual gearboxes, the cause is often worn clutch components, while in automatic transmissions, faulty sensors or internal mechanisms may be to blame.

2. Transmission fluid leaks
Transmission oil is essential for smooth gearbox operation. If you notice dark red or brownish fluid stains under the truck, you should get it checked immediately.
Leaks may be caused by damaged seals or a cracked gearbox casing.

3. Clunking or metallic noises during gear shifts
Unusual noises are a major red flag.
Sometimes it may be due to old or low-quality transmission oil, but more often it points to worn-out internal parts that need to be replaced.

4. Warning lights on the dashboard
Modern trucks are equipped with sensors that alert the driver about system issues. If you see a warning related to the gearbox, don’t ignore it.
Sometimes the message may be general like “Transmission Fault” or “Check Engine,” but it's still important to get it diagnosed.

5. Jerky movement or vibrations
If you feel vibrations while driving—especially during gear shifts—this may be a sign of a serious problem.

What should you do?

If any of these signs sound familiar, don’t wait. Bring your truck to Vako Motors—timely diagnostics and the use of premium-quality parts can help you avoid expensive repairs.

Where to get your truck’s gearbox inspected?

At Vako Motors, as the official DAF partner and a leading service provider in the Caucasus region, we offer:

• Professional diagnostics
• Genuine parts from world-leading brands
• An experienced team of mechanics
• Fast and high-quality service

Take care of your truck—act on time and avoid future complications.