Overview
The ZF 4681.054.051 4 BP 210 BASICPOWER Transmission Assembly is a complete, factory-grade replacement unit engineered for heavy-duty commercial drivetrains. This SKU 4681.054.051 serves as the core hydraulic-mechanical assembly within the BP 210 and BP 230 series, integrating the torque converter, planetary gear sets, and valve body into a single ready-to-install package. Designed for direct drop-in installation, this assembly restores full power transfer and shift logic in ZF BASICPOWER transmissions operating under extreme load cycles. As a complete unit, it eliminates the need for internal component rebuilding, providing a reliable solution for fleet maintenance and repair operations.
Symptoms of Failure
When the ZF 4681.054.051 assembly begins to degrade, operators typically notice distinct performance issues. Recognizing these signs early can prevent catastrophic drivetrain damage.
- Delayed or harsh gear engagement: A worn assembly often causes a noticeable lag when shifting from neutral to drive or reverse, accompanied by a jarring clunk. This symptom is frequently searched as “ZF transmission delayed engagement fix.”
- Internal hydraulic leaks: Degraded seals within the assembly lead to fluid bypass, resulting in low line pressure and visible oil seepage around the bell housing. This is a common cause of “ZF BP210 transmission oil leak from housing.”
- Torque converter shudder: A failing assembly produces a vibration or shudder during acceleration, particularly under load. This is often described as “ZF transmission shudder at low RPM” in technical forums.
- Complete loss of forward or reverse: Advanced wear can cause the assembly to lose hydraulic lock-up, resulting in a no-move condition despite the engine running. This is a critical failure mode for “ZF BASICPOWER no reverse” queries.
Technical Specifications
| Part Number / SKU | 4681.054.051 |
| Assembly Type | Complete Transmission Unit (4 BP 210 BASICPOWER) |
| Overall Length | 685 mm (27.0 in) |
| Overall Width | 410 mm (16.1 in) |
| Overall Height | 395 mm (15.6 in) |
| Dry Weight | 145 kg (320 lbs) |
| Housing Material | High-tensile aluminum alloy (A356-T6) |
| OEM Reference | ZF 0501.210.001 (Superseded) |
| Fluid Capacity | 12.5 L (13.2 qt) of ZF EcoFluid M-1375.4 |
Compatibility
This assembly is precision-machined to fit specific ZF transmission models within the BASICPOWER family. It is a direct replacement for units originally equipped with the 4-speed BP 210 and BP 230 configurations. Verified compatible models include:
- ZF WG180 (4-speed, off-highway variant)
- ZF WG200 (4-speed, on-highway variant)
- ZF BP210 (4 BP 210 series, standard duty)
- ZF BP230 (4 BP 230 series, heavy-duty)
- ZF 4HP210 (early production, with adapter plate)
Always verify the bell housing pattern and torque converter pilot diameter against your original unit before installation. This assembly does not include the external wiring harness or shift selector module.
