ZF 6AP1200 / 6AP1400B Auto Transmission

ZF 6AP Series EcoLife 6-Speed Automatic Transmission

Model: 6AP1200B, 6AP1400B, 6AP1700B, 6AP2020CThis ZF EcoLife automatic power-shift gearbox is professionally designed for city buses, suburban coaches and tour buses with six forward gears, covering diversified torque requirements for commercial passenger vehicles.Torque Parameter Match6AP1200B: Max input torque 1200 Nm, for 19~28 tons medium & small city buses6AP1400B: Max input torque 1400 Nm, standard assembly for common 12-meter city buses6AP1700B: Max input torque 1700 Nm, suitable for heavy-duty public transport & intercity coaches6AP2020C: Max input torque 2000 Nm, matches heavy large-bore high-power coaches

Equipped with integrated mechatronic unit and TopoDyn intelligent shifting system, it adjusts shift strategy intelligently according to road conditions for smooth shifting and strong start performance. Wide gear ratio spread cuts engine cruising speed and improves fuel economy by 3% compared with old generations. Built-in retarder lowers brake loss effectively.Each unit passes strict bench test including pressure tightness and durability inspection. All internal gears, clutch plates and housing follow OEM standards for stable performance and long service life. Direct installation without extra modification, widely compatible with Mercedes-Benz, Yutong, Higer, Golden Dragon, Scania buses for repair and replacement. Use ZF TE-ML 20 dedicated transmission fluid for maintenance.