The J4S245 is a 4-speed AMT transmission developed by Suzhou Lvkong for 2600N·m class new energy heavy-duty trucks. It is suitable for heavy-duty dump trucks, mixer trucks and sanitation vehicles. The supporting PTO remains the original factory QF700, fully interchangeable with the J4S240 model.

Model: J4S245 DD (4-speed AMT) Maximum Input Torque: 2600N·m (200N·m higher than J4S240) Maximum Power: 265kW (360 HP) Gears: 4 forward gears + 1 reverse gear Gear Ratio: 8.39 / 3.54 / 1.74 / 1 (Reverse gear ratio pending) Maximum Input Speed: 3000rpm Matching Motor: Lvkong TZ460XS series (peak power: 265–450kW) Applicable Vehicles: 18–25 ton class pure electric dump trucks, mixer trucks and sanitation vehicles (e.g., Chenglong L3, Dongfeng Tianjin KC Heavy-duty Version)

Model: QF700 (Original factory optional) Maximum Output Torque: 700N·m Gear Ratio: 0.893 (Rear power take-off, coaxial with output shaft) Weight: Approx. 19kg Interface: Standard spline shaft (directly compatible with hydraulic pumps / mixer drives) Control Mode: Electric / pneumatic engagement, controlled by cab switch Operation Mode: Engageable both in static state and driving condition

Torque Capacity: J4S245 2600N·m; J4S240 2400N·m (approx. 8% upgrade) First Gear Ratio: J4S245 8.39 (better for heavy-load start); J4S240 8.67 Matching Power: J4S245 fits 265kW motor; J4S240 fits 240kW motor Mounting Interface: Fully compatible with frame and drive shaft, direct replacement available PTO Compatibility: QF700 fully universal with identical mounting position and control logic

Pure Electric Dump Truck: Chenglong L3 8×4/6×4, Dongfeng Tianjin KC Heavy-duty Version (25-ton load class) Concrete Mixer Truck: 12–15m³ pure electric mixer truck (requires continuous PTO power supply) Sanitation Vehicle: Large water sprinkler, compressed garbage truck (power source for hydraulic system) Features: Stronger heavy-load starting performance, more stable climbing capability, suitable for harsh working conditions of mines and construction sites

Original factory matching: High transmission efficiency (≥96%) and outstanding reliability, perfectly matched with Lvkong high-torque motors Powerful PTO performance: 700N·m output to drive large-displacement hydraulic pumps (for 12m³+ mixer trucks) Excellent working condition adaptability: Supports heavy-load start, steep slope climbing and continuous PTO output Low maintenance cost: Shared PTO and partial spare parts with J4S240, high parts versatility