Overview
This genuine ZF 4681.054.036 4 BP 210 BASICPOWER Transmission Assembly represents a complete, drop-in replacement unit engineered for medium-duty commercial and industrial drivetrains. As a fully assembled assembly, it integrates the hydraulic control unit, clutch packs, and planetary gear sets into a single, pre-tested module. The SKU 4681.054.036 is specifically designed to restore full power flow and shift quality in ZF’s BP 210 and BP 230 series transmissions, eliminating the need for piecemeal repairs. This unit sits at the heart of the powertrain, converting engine torque into controlled, reliable wheel speed under heavy load conditions.
Symptoms of Failure
When the ZF 4681.054.036 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. Second, intermittent gear slipping under load occurs, particularly during uphill climbs or when towing, as internal clutch packs lose hydraulic clamping force. Third, external fluid seepage from the main housing gasket or output shaft seal is a common indicator of internal pressure loss or seal degradation. Fourth, a persistent whining noise from the transmission sump, distinct from normal gear noise, suggests bearing wear or pump cavitation within the assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | ZF 4681.054.036 |
| Assembly Type | Complete Transmission Unit (4 BP 210 BASICPOWER) |
| Dry Weight | Approx. 195 kg (430 lbs) |
| Housing Material | High-Strength Aluminum Alloy (A356-T6) |
| Overall Length | 785 mm (30.9 in) |
| Input Torque Capacity | 2,100 Nm (1,549 lb-ft) |
| Fluid Capacity | 22 Liters (5.8 Gallons) |
| Bolt Torque (Bell Housing) | 85 Nm (63 lb-ft) |
Compatibility
This complete assembly is engineered for direct fitment into the following ZF transmission model families:
- ZF BP 210 Series (all variants including 4 BP 210, 6 BP 210)
- ZF BP 230 Series (all variants including 4 BP 230, 6 BP 230)
- ZF WG180 Series (retrofit applications with adapter plate)
- ZF WG200 Series (retrofit applications with adapter plate)
Always verify bell housing pattern and output flange configuration against your existing unit. For applications in refuse trucks, fire apparatus, or heavy-duty delivery vehicles, this assembly replaces earlier ZF 4 HP 220 units with minor hydraulic line modifications.
Installation Notes
Prior to installation, inspect the torque converter pilot bore and ensure the transmission cooler lines are flushed. Use only ZF-approved LifeguardFluid 8 for optimal clutch pack lubrication and shift quality.
