Brand Name:
SUZUKI
Model Number:
TW-40LS
Function: 4-speed longitudinal transmission (Aisin-Warner design) for SUV/RWD platforms (e.g., Suzuki Grand Vitara).
Key Features:
Torque Capacity: 330Nm (paired with J24B engines)
Gearset: Simpson planetary + overdrive unit
Shift Logic: Adaptive learning for throttle pattern recognition
Failure Modes:
3-4 Clutch Burnout: Delayed shifts cause overheating (P0760)
Valve Body Wear: Shift solenoid B sticks (harsh 2-3 shifts)
Extension Housing Leaks: Rear seal degradation (fluid loss)
Critical Maintenance:
Fluid: Suzuki ATF 3317 or Dexron III
Band Adjustment: 1.5-2 turns past finger tight (every 60k km)
TCU Reset: Required after fluid change
Pro Tip: Check converter clutch apply piston – worn rings cause TCC shudder (P0741).
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