Overview
The ZF 4681.034.004 CONVERTER BASICPOWER Transmission Assembly is a complete, drop-in ready torque converter unit engineered for the BP 210 and BP 230 series. This assembly serves as the critical hydraulic coupling between the engine and the gearbox, converting rotational power into fluid energy to enable smooth, modulated torque transfer. As a fully assembled unit, SKU 4681.034.004 replaces the entire converter assembly, eliminating the need for piecemeal repairs. It integrates directly with the TRANSMISSION HOUSING and mates precisely to the HOUS.FRONT SECT to ensure concentric alignment and leak-free operation.
Symptoms of Failure
- Torque converter shudder or vibration during lock-up: A worn 4681.034.004 unit often causes noticeable shuddering when the converter clutch engages, particularly under moderate acceleration.
- Transmission fluid leaks near the bell housing: Degraded seals within the converter assembly lead to ATF seepage, often mistaken for a front pump seal failure.
- Delayed or harsh engagement from Park to Drive: Internal wear reduces hydraulic pressure, resulting in a pronounced lag or jarring shift when selecting a gear.
- Overheating transmission fluid: A failing converter generates excessive heat due to internal slippage, triggering warning lights or burnt fluid odor.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4681.034.004 |
| Assembly Type | Complete Converter BasicPower Unit |
| Overall Diameter | ~340 mm (estimated) |
| Overall Length | ~180 mm (estimated) |
| Dry Weight | ~14.5 kg (32 lbs) |
| Primary Material | High-strength steel housing with aluminum impeller |
| OEM Reference | ZF BP 210 / BP 230 Series |
| Torque Capacity | Up to 600 Nm (estimated) |
| Lock-up Clutch | Integrated hydraulic piston type |
Compatibility
This converter assembly is specifically designed for ZF BP 210 and BP 230 series transmissions. It is commonly found in WG180, WG200, and WG210 gearbox variants used in medium-duty trucks, construction loaders, and agricultural tractors. The unit also interfaces with the HOUSING REAR PART and the CASE to form the complete torque converter enclosure. Always verify your transmission model suffix before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4681101002 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4681201007 | HOUS.FRONT SECT | Front section housing for converter |
| 4681201008 | HOUSING REAR PART | Rear section housing for converter |
| 4681298001 | CASE | Converter outer protective case |
| 0631306074 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4681301015 | FIXING PLATE | Secures converter to flexplate |
| 4681301016 | SCREEN SHEET | Filter screen for oil flow |
| 4681301017 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Bolt for converter mounting |
Frequently Asked Questions
Q: Can the 4681.034.004 converter be rebuilt, or must it be replaced as a complete unit?
A: This part is designed as a sealed, complete assembly. While internal components like the clutch can theoretically be serviced, ZF recommends full replacement to ensure proper balance and hydraulic integrity.
Q: Does this converter work with both the BP 210 and BP 230 series without modification?
A: Yes, the 4681.034.004 is a shared component across both series. However, you must confirm that your transmission uses the same flexplate bolt pattern and pilot diameter, as some early BP 210 units differ.
Q: What torque capacity does this converter handle?
A: It is rated for approximately 600 Nm of input torque, making it suitable for engines up to about 300 horsepower in typical industrial applications.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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