Here is a clear Toyota Vios NCP42 auto gearbox description (suitable for parts listing / workshop use):

🚗 Toyota Vios NCP42 Auto Gearbox Description

The Toyota Vios NCP42 (2002–2007, first generation) is equipped with a 4-speed automatic transmission (U340E) paired with the 1.5L 1NZ-FE engine. 

🔧 Basic Specifications

• Gearbox type: Automatic transmission (AT)
• Model code: U340E
• Speeds: 4-speed
• Drive system: Front-wheel drive (FWD)
• Engine compatibility: 1NZ-FE 1.5L petrol engine
• Control system: Electronic controlled (ECT)
• Torque converter: Yes (with lock-up function)

⚙️ Key Features

• Smooth and reliable gear shifting (Toyota ECT system)
• Simple hydraulic + electronic control (easy maintenance)
• Built for durability and daily driving use
• Plug & play (PNP) for NCP42 chassis (no modification needed)

🔩 Design & Operation

• Uses planetary gear set system
• Equipped with valve body + solenoids to control gear shifts
• Has ATF oil cooling system (through radiator)
• Includes ABS sensor compatibility (depending on version)

🛠️ Common Issues (High Mileage)

• Gear slipping (worn clutch packs)
• Delayed engagement (valve body / solenoid issue)
• Hard shifting (dirty ATF or sensor problem)
• Oil leakage (seals & gasket aging)

✅ Advantages

• Very reliable & long-lasting gearbox
• Spare parts widely available in Malaysia
• Lower repair cost compared to CVT
• Suitable for city driving and daily use

📦 Market Notes (Malaysia)

• Usually sold as halfcut / used unit
• Price range: ~RM1,200 – RM2,000 (depending on condition)  

If you want, I can also help you write a sales advertisement (Mudah / Facebook style) or compare this gearbox with Vios NCP93 / CVT gearbox 👍