Suited for engines delivering up to 320 kW (approx. 430 hp).
Built-in sensors constantly compute the accurate gradient angle of a hill.
Additional critical technical data for the 6AP1700B includes:
The integration of a new, advanced torsional damper reduces vibrations and noise, creating a quieter interior for passengers and a more comfortable experience for the driver. ZF EcoLife vs. EcoLife 2: The Next Generation zf ecolife 6ap1700b
Delivers high braking power even at low speeds, significantly reducing wear on service brakes and lowering lifecycle costs.
| Condition | Oil change interval | |-----------|----------------------| | Standard duty (long-distance) | ~300,000 km (186k miles) or 3 years | | Severe duty (city bus, refuse) | ~120,000 km (75k miles) or 2 years | | With oil condition sensor (optional) | Extendable depending on measured quality |
Supports vehicles with a gross weight of up to 32–42 tonnes , depending on the specific axle ratio configuration. Key Features for Fleet Operators Suited for engines delivering up to 320 kW (approx
| Specification | Value | |---------------|-------| | | 5.6:1 | | Torque Converter | Lock-up clutch with torsional damper | | Weight (dry) | Approx. 240 kg (529 lbs) | | Oil Capacity | Approx. 12-14 liters (ZF EcoLife Fluid Matic) | | Input Speed | Max 2,800 rpm | | Output Position | Offset (standard for low-floor buses) | | Integrated Retarder | ZF Intarder (optional, within transmission housing) | | Control Unit | Electronic Control Unit (TCU) mounted on the valve body |
The transmission relies on an optimized hydrodynamic torque converter paired with a lock-up clutch. The lock-up clutch engages early in the acceleration phase, establishing a direct mechanical connection between the engine and the planetary gearset. This eliminates the hydraulic slippage inherent to torque converters, maximizing energy transfer and drastically lowering fuel consumption during low-speed transit operations. Planetary Gearset Configuration
The 6AP1700B variant strikes an optimal balance between low dry weight, oil management efficiency, and high torque capacity. The specific parameters defined by the ZF Aftermarket Product Catalog include: 1,700 Nm. contaminated oil | Perform adaptation
family—a series of 6-speed automatic transmissions built for passenger transport. The "1700" in its name signifies its maximum input torque capacity: a substantial
| Symptom | Likely Cause | Action | |---------|--------------|--------| | No forward or reverse | Low oil level, pump failure, or selector cable issue | Check oil level; read TCU fault codes | | Harsh shifts | Worn solenoids, contaminated oil | Perform adaptation; replace oil & filter | | Retarder weak/no effect | Low oil, overheated oil, or faulty brake switch | Check oil temp; verify brake signal on CAN | | Limp-home mode (3rd gear only) | Speed sensor fault or TCU power loss | Read fault codes; check 5V supply to sensors | | Oil leaks | Pan gasket, selector shaft seal, or cooler lines | Replace gasket/seal; inspect cooler lines |