Overview
The ZF 4681.084.025 4 BP 230 BASICPOWER Transmission Assembly is a complete, factory-grade unit designed for heavy-duty commercial and industrial driveline applications. As a fully assembled drop-in replacement, this assembly integrates the valve body, clutch packs, and hydraulic control module into a single, pre-tested package. The SKU 4681.084.025 is engineered to deliver consistent torque handling under high-cycle loads, making it a critical component for vehicles operating in construction, municipal, and long-haul logistics environments. This unit sits at the heart of the transmission system, converting engine power into controlled wheel motion through a series of planetary gear sets and wet clutches.
Symptoms of Failure
When the ZF 4681.084.025 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 noticeable shudder during low-speed maneuvering. Second, internal hydraulic pressure loss manifests as erratic shifting or a complete loss of drive in specific gear ranges, particularly under heavy load. Third, visible fluid contamination—characterized by a burnt smell or metallic particles in the transmission oil—indicates clutch pack wear or seal degradation. Fourth, audible whining or grinding noises from the bell housing area suggest bearing fatigue or planetary gear damage, requiring immediate inspection.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4681.084.025 |
| Assembly Type | Complete Unit (4 BP 230 BASICPOWER) |
| Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm (28.3 in) |
| Housing Material | High-strength aluminum alloy (A356-T6) |
| Clutch Disc Material | Sintered bronze on steel core |
| Max Input Torque | 2,300 Nm (1,696 lb-ft) |
| Hydraulic Pressure Range | 12–18 bar (174–261 psi) |
| Fluid Capacity (assembly) | 4.2 liters (1.1 gal) |
| Bolt Torque Spec (bell housing) | 85 Nm (63 lb-ft) |
Compatibility
This assembly is specifically designed for the ZF BP 210 and BP 230 series transmissions. It is a direct fit for the following transmission models and their variants:
- ZF WG180 (all sub-variants including WG180-1 and WG180-2)
- ZF WG200 (standard and high-torque versions)
- ZF BP 230 BASICPOWER (4-speed configuration)
- ZF BP 210 (early and late production runs)
- ZF 4 BP 230 (complete unit replacement)
Always verify the serial number plate on your existing transmission before ordering. The 4681.084.025 unit is not compatible with ZF AS Tronic or Ecolife series without significant adapter modifications.
Installation Notes
This complete assembly includes the torque converter housing, valve body, and all internal rotating components. It is recommended to replace the external filter and flush the cooler lines during installation. Use only ZF-approved transmission fluid (TE-ML 03 or 05 specification) to maintain warranty compliance.
