Overview
The ZF 4681.084.012 4 BP 230 BASICPOWER Transmission Assembly is a complete, factory-matched unit designed for heavy-duty commercial vehicle drivelines. This assembly integrates the core gear train, clutch housing, and hydraulic control system into a single, ready-to-install package. As a full replacement for the BP 230 series, it eliminates the need for piecemeal repairs, ensuring precise alignment and OEM-specified tolerances. The SKU 4681.084.012 is the direct service part for vehicles requiring a complete transmission swap, restoring original shift quality and torque capacity. This unit works in concert with the TRANSMISSION HOUSING to contain the planetary gearsets, while the HOUS.FRONT SECT and HOUSING REAR PART provide structural support for the output shaft and valve body.
Symptoms of Failure
When the ZF 4681.084.012 assembly begins to fail, operators typically notice these specific issues:
- Delayed or harsh engagement: A noticeable lag when shifting from Neutral to Drive or Reverse, often accompanied by a jarring clunk. This indicates internal wear in the clutch packs or valve body.
- Torque converter shudder: A vibration felt through the chassis during low-speed acceleration, particularly under load. This points to failing lock-up clutch components within the assembly.
- Fluid contamination with metallic debris: Dark, burnt-smelling transmission fluid containing fine metal particles, visible on the dipstick or during a drain. This signals advanced wear of bearings or gear teeth inside the unit.
- Complete loss of forward or reverse gears: The transmission fails to engage one or more gear ranges, often due to a cracked CASE or broken planetary carrier.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4681.084.012 |
| Assembly Type | Complete BASICPOWER Unit (4 BP 230) |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 820 mm |
| Housing Material | High-Strength Aluminum Alloy |
| OEM Reference | ZF 4681.084.012 / 4 BP 230 |
| Max Torque Capacity | 2,300 Nm |
| Fluid Capacity | 18.5 Liters (with cooler) |
Compatibility
This complete transmission assembly is engineered for the ZF BP 230 series, which is commonly installed in medium-duty trucks, buses, and construction equipment. It is a direct replacement for models including the ZF WG180, WG200, and WG210 series transmissions that utilize the BASICPOWER architecture. The unit also fits select ZF 4HP and 4WG variants where the BP 230 designation is specified. Always verify the bellhousing pattern and output flange configuration against your existing unit before installation.
Related Components
The following parts are frequently replaced alongside the 4681.084.012 assembly to ensure a complete overhaul:
| Part Number | Name | Function |
|---|---|---|
| 4681101002 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4681201007 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4681201008 | HOUSING REAR PART | Rear section supporting output shaft |
| 4681298001 | CASE | Protective cover for valve body |
| 0631306074 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4681301015 | FIXING PLATE | Retains oil filter assembly |
| 4681301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Bolt for valve body mounting |
Frequently Asked Questions
Q: Is the ZF 4681.084.012 a remanufactured or new unit?
A: This part is supplied as a complete new assembly, built to OEM specifications. It includes all internal components, gaskets, and seals pre-installed.
Q: Can I install this assembly without replacing the torque converter?
A: While the unit is complete, ZF strongly recommends replacing the torque converter simultaneously to prevent contamination from the old unit. The converter is not included in this assembly.
Q: What is the warranty period for this transmission assembly?
A: Standard warranty coverage is 12 months from the date of installation, covering manufacturing defects. Extended warranty options are available through your distributor.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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