Overview
The ZF 4681.086.011 6 BP 230 BASICPOWER Transmission Assembly represents a complete, drop-in replacement unit engineered for the BP 210 and BP 230 series of powershift transmissions. This fully assembled component integrates the main drive housing, planetary gear sets, and hydraulic valve body into a single, pre-tested package. As a complete unit, it eliminates the need for complex sub-assembly work, reducing vehicle downtime significantly. The SKU 4681.086.011 is specifically calibrated for the BASICPOWER variant, ensuring optimal torque distribution and shift quality under moderate to heavy load conditions. This assembly sits at the core of the driveline, converting engine power into controlled wheel or PTO motion.
Symptoms of Failure
When the ZF 4681.086.011 assembly begins to degrade, operators will notice distinct operational issues. Recognizing these symptoms early can prevent catastrophic driveline damage.
- Erratic gear engagement or “slipping” under load: The transmission may hesitate or fail to hold a gear when climbing grades or carrying a heavy payload. This is often caused by worn clutch packs or degraded sealing rings within the assembly.
- Persistent hydraulic oil leaks near the bell housing or PTO mounting flange: External seepage of ATF or hydraulic fluid, particularly around the main gasket interfaces, indicates seal failure. This is a common long-tail search query for “ZF BP 230 oil leak repair.”
- Delayed or harsh shift quality between forward and reverse: A noticeable “clunk” or a 2-3 second delay when shifting from neutral to drive or reverse points to internal valve body wear or low accumulator pressure within the 4681.086.011 unit.
- Unusual whining or grinding noises from the transmission center section: High-pitched metallic sounds that change with engine RPM, rather than vehicle speed, suggest bearing fatigue or planetary gear scoring inside the assembly.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4681.086.011 |
| Assembly Type | Complete Unit (6 BP 230 BASICPOWER) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Housing Material | High-strength cast aluminum alloy |
| Input Torque Capacity | Up to 600 Nm (442 lb-ft) |
| Fluid Capacity (assembly) | 12.5 liters (ATF Dexron III equivalent) |
| OEM Reference | ZF 4681 086 011 |
Compatibility
This complete transmission assembly is designed for direct fitment into specific ZF powershift models. While primarily intended for the BP 230 and BP 210 series, it also serves as a service replacement for earlier BASICPOWER variants. Verified compatible transmission model series include:
- ZF WG180 (late production models with BASICPOWER designation)
- ZF WG200 (when equipped with the 6-speed configuration)
- ZF BP 210 (all sub-variants requiring complete unit replacement)
- ZF BP 230 (standard and heavy-duty versions)
Note: Always verify the bell housing pattern and PTO orientation against your specific vehicle chassis. This unit does not include the torque converter or external cooler lines.
