Overview
This genuine ZF 4681.030.002 CONVERTER BASICPOWER Transmission Assembly is a complete, drop-in ready torque converter unit engineered for the BP 210 and BP 230 series. As the critical hydraulic coupling between the engine and the gearbox, this assembly transfers and multiplies engine torque while allowing the vehicle to idle in gear. The SKU 4681.030.002 designates a fully assembled converter with a BASICPOWER stator and turbine design, optimized for medium-duty industrial applications where consistent load handling and thermal stability are paramount. This unit replaces worn or failed converters to restore full driveline efficiency and prevent secondary damage to the pump and clutch packs.
Symptoms of Failure
When the ZF 4681.030.002 converter begins to degrade, operators typically notice these specific failure indicators:
- Shudder or vibration during lock-up engagement – A low-frequency shake felt through the chassis when the converter clutch applies, often caused by worn friction material or degraded damper springs.
- Delayed or harsh forward engagement – A noticeable lag or abrupt clunk when shifting from Neutral to Drive, indicating internal stator or turbine hub wear.
- Dark, burnt transmission fluid with metallic particles – Contamination from shedding clutch lining or bearing debris, visible on the dipstick or during a drain.
- Overheating under moderate load – The transmission temperature gauge climbs rapidly during normal operation, a sign that the converter is slipping excessively and generating excess heat.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4681.030.002 |
| Assembly Type | Complete Converter (BASICPOWER) |
| Overall Diameter | 340 mm (13.4 in) |
| Pilot Diameter | 55 mm (2.17 in) |
| Mounting Bolt Pattern | 6-bolt, 10.9 grade |
| Dry Weight | 14.5 kg (32.0 lbs) |
| Primary Material | High-strength steel housing, sintered bronze bushings |
| OEM Reference | ZF 0501.312.001 (superseded) |
| Torque Capacity (max) | 1,200 Nm (885 lb-ft) |
Compatibility
This converter assembly is specifically engineered for ZF transmission models that utilize the BP 210 and BP 230 converter housing patterns. Verified compatible transmissions include:
- ZF WG180 – 6-speed powershift, common in wheel loaders and forklifts.
- ZF WG200 – Heavy-duty off-highway transmission for graders and dozers.
- ZF 4WG200 – 4-speed variant with integrated retarder.
- ZF 6WG250 – Higher torque capacity variant used in large telehandlers.
Always cross-reference your transmission serial number with the ZF parts catalog to confirm fitment, as minor variations exist between early and late production runs of the BP 210/230 series.
