Overview
The ZF 4681.056.005 6 BP 210 BASICPOWER Transmission Assembly | Complete Unit is a factory-engineered drop-in replacement designed for heavy-duty commercial and industrial powertrain applications. This complete assembly integrates the main housing, gear cluster, and hydraulic control system into a single, pre-assembled unit, eliminating the need for complex rebuilds. As a core component of the BP 210 and BP 230 series, this SKU (4681.056.005) delivers the robust torque capacity and shift reliability required for buses, construction vehicles, and specialty trucks. The unit is fully tested to OEM specifications, ensuring seamless integration with existing drivelines and minimal downtime during installation.
Symptoms of Failure
When the ZF 4681.056.005 assembly begins to degrade, operators typically notice three distinct failure modes. First, delayed or harsh engagement between forward and reverse gears becomes apparent, often accompanied by a pronounced clunk during shifts. Second, internal hydraulic pressure loss manifests as erratic shifting or a complete loss of drive in higher gears, particularly under load. Third, external oil seepage from the main case gasket or output shaft seal is common, leading to low fluid levels and eventual overheating. Finally, vibration during coasting in the 6th gear position indicates worn planetary bearings, a critical sign that the assembly requires immediate replacement to avoid secondary damage.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4681.056.005 |
| Assembly Type | Complete Transmission Unit (6-speed) |
| Series | BP 210 / BP 230 BASICPOWER |
| Overall Length | ~ 820 mm (32.3 in) |
| Dry Weight | ~ 245 kg (540 lbs) |
| Housing Material | High-strength aluminum alloy (A356-T6) |
| Input Torque Rating | 2,100 Nm (1,549 lb-ft) |
| OEM Reference | ZF 6 BP 210 / 6 BP 230 |
| Fluid Capacity | ~ 18 liters (4.75 gallons) |
Compatibility
This complete assembly is engineered for direct fitment into the following ZF transmission model families:
- ZF WG180 – All variants using the BP 210 series bellhousing pattern.
- ZF WG200 – Models equipped with the 6-speed BASICPOWER hydraulic control.
- ZF 6 BP 210 – Standard production units from 2010 onward.
- ZF 6 BP 230 – Heavy-duty versions with reinforced output flanges.
- ZF Ecolife 6AP – Select retrofit applications requiring the BP 210 base assembly.
Always verify the transmission serial number and bellhousing bolt pattern before ordering. The 4681.056.005 unit is not backward-compatible with the older 5-speed HP 500 series without adapter plates.
