Four-wheel drive TW-40LS automatic transmission, suitable for SUZUKI 2017 model.

Overview: Aisin-Warner designed 4/5-speed longitudinal transmission for SUV/truck applications (e.g., older Toyota Land Cruiser Prado).

Key Features:

• Transfer Case Integration: Full-time 4WD with center differential lock (50:50 split)

• Torque Capacity: Rated for 400Nm with reinforced 3-4 clutch pack

• Gearset: Simpson planetary with overdrive unit

Common Failures:

1. 3-4 Clutch Burnout: Due to delayed shift timing (P0760 codes)

2. Transfer Case Chain Stretch: Causes 4WD engagement faults

3. Valve Body Wear: Particularly shift solenoid B (harsh 2-3 shifts)

Critical Maintenance:

• Use Toyota Type T-IV or equivalent

• Adjust band every 60k km (1.5-2.5 turns past finger tight)

• Flush cooler lines when replacing burnt clutches

Pro Tip: Check extension housing bushing wear – causes output shaft vibration at highway speeds.