Overview
The ZF 4681.056.009 6 BP 210 BASICPOWER Transmission Assembly represents a complete, factory-grade replacement unit engineered for medium-duty driveline applications. This assembly integrates the valve body, clutch packs, and torque converter housing into a single, ready-to-install component, restoring full hydraulic and mechanical function to ZF BP 210 and BP 230 series transmissions. The SKU 4681.056.009 is specifically calibrated for the BASICPOWER variant, offering a balance of durability and cost-efficiency for fleet operators. As a complete unit, it eliminates the need for partial rebuilds, ensuring consistent shift quality and torque delivery across the entire power band.
Symptoms of Failure
When the ZF 4681.056.009 assembly begins to degrade, operators typically notice distinct operational issues. Recognizing these signs early can prevent cascading damage to the driveline.
- Delayed or harsh engagement – A noticeable lag when shifting from Neutral to Drive or Reverse, often accompanied by a jarring clunk. This indicates worn clutch pack clearances or degraded hydraulic seals within the assembly.
- Intermittent gear slipping under load – The transmission unexpectedly loses power during acceleration, particularly on inclines. The engine RPM rises without a corresponding increase in vehicle speed, pointing to internal pressure loss.
- Dark, burnt-smelling transmission fluid – Fluid that appears brown or black and emits a sharp odor suggests excessive friction material wear inside the unit. This often correlates with overheating from blocked valve body passages.
- External oil seepage at the bell housing – Visible drips or wetness around the main seal area indicate that the pump seal or gasket within the assembly has hardened, leading to fluid loss and eventual starvation.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4681.056.009 |
| Assembly Type | Complete Unit (6 BP 210 BASICPOWER) |
| Overall Length | Approx. 620 mm (24.4 in) |
| Dry Weight | Approx. 68 kg (150 lbs) |
| Housing Material | High-tensile aluminum alloy (A356-T6) |
| Clutch Pack Count | 6 friction discs (forward) / 3 (reverse) |
| Max Input Torque | 600 Nm (442 lb-ft) |
| Fluid Capacity | 12.5 liters (13.2 quarts) of Dexron III |
| OEM Reference | ZF Friedrichshafen AG |
Compatibility
This complete assembly is designed for direct fitment into specific ZF transmission families that share the BP 210 and BP 230 architecture. While the 4681.056.009 is a BASICPOWER variant, it is mechanically interchangeable with standard BP units after minor valve body recalibration. The following models are confirmed compatible:
- ZF WG180 – All series using the 6-speed BP 210 core
- ZF WG200 – Models with BASICPOWER hydraulic logic
- ZF 6 HP 210 – Early production units (pre-2015)
- ZF 6 HP 230 – Units requiring a 600 Nm torque limit
- ZF Ecolife 6 AP 210 – With adapter plate modification
Always verify the transmission serial number against the ZF parts catalog before installation. This assembly does not fit the HP 500 or AS Tronic series.
