Overview
The ZF 4681.056.003 6 BP 210 BASICPOWER Transmission Assembly is a factory-engineered complete unit designed to restore heavy-duty drivelines to peak operational condition. This assembly integrates the main housing, planetary gear sets, and hydraulic control components into a single, ready-to-install package. As a direct replacement for the BP 210 and BP 230 series platforms, the SKU 4681.056.003 eliminates the need for complex internal rebuilds, providing a guaranteed solution for commercial vehicles, construction machinery, and municipal equipment. By replacing the entire assembly, operators avoid the risk of cascading failures from worn internal components, ensuring consistent torque delivery and extended service intervals.
Symptoms of Failure
When the ZF 4681.056.003 assembly begins to degrade, specific operational issues become apparent. Recognizing these symptoms early can prevent costly downtime and secondary damage to the driveline.
- Erratic gear engagement and slipping under load: A worn assembly often fails to maintain hydraulic pressure, causing the transmission to slip out of gear during acceleration or when climbing grades. This is frequently reported as a “ZF transmission slipping in forward gears” issue.
- Persistent oil leaks from the main housing or bell housing interface: Cracks in the casing or degraded sealing surfaces allow transmission fluid to escape. Look for puddles under the vehicle or a steady drip near the output flange, often searched as “ZF BP 210 oil leak repair.”
- Loud grinding or whining noises during gear shifts: Worn bearings or damaged planetary gears produce a distinct metallic noise that intensifies with speed. This symptom is commonly described as “ZF transmission grinding noise when shifting.”
- Delayed or harsh shifting between ranges: A failing valve body or worn clutch packs within the assembly cause a noticeable lag when moving from neutral to drive or between forward ranges, leading to “ZF transmission harsh shift” complaints.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4681.056.003 |
| Assembly Type | Complete Unit (6 BP 210 BASICPOWER) |
| Housing Material | High-strength cast aluminum alloy |
| Dry Weight (approx.) | 98 kg (216 lbs) |
| Overall Length | 620 mm (24.4 in) |
| Input Torque Capacity | Up to 600 Nm (442 lb-ft) |
| Fluid Capacity | 12.5 liters (3.3 gallons) |
| OEM Reference | ZF Friedrichshafen AG |
| Bolt Pattern | SAE 3 standard |
Compatibility
This complete assembly is engineered for direct fitment into ZF transmission models that utilize the BP 210 and BP 230 series architecture. It is specifically designed to replace units in the following transmission families:
- ZF WG180 – Common in mid-size refuse trucks and fire apparatus.
- ZF WG200 – Found in heavy-duty dump trucks and concrete mixers.
- ZF 6 HP 210 – Used in agricultural tractors and wheel loaders.
- ZF 6 HP 230 – Applied in coach buses and heavy off-road vehicles.
- ZF Ecomat 4 HP 220 – Compatible with earlier generation city buses.
Always verify the bell housing pattern and output flange configuration against your specific vehicle’s VIN or transmission tag before installation. For applications outside the listed models, consult a ZF service center for cross-reference confirmation.
