Overview
The ZF 4681.201.024 HOUSING REAR PART is a critical structural component engineered for the BP 210 and BP 230 series of heavy-duty transmissions. This OEM genuine part encloses the rear section of the gearbox, providing essential support for the output shaft assembly and maintaining precise alignment of internal bearings and seals. As the primary barrier against contamination, this housing ensures that lubricating oil remains contained under high torque and thermal stress. The SKU 4681.201.024 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life in demanding industrial applications.
Symptoms of Failure
When the rear housing deteriorates, operators often encounter distinct operational issues. Recognizing these failure modes early can prevent costly secondary damage to the transmission internals.
- Persistent oil seepage from the rear output flange: A cracked or warped housing allows transmission fluid to escape, leading to low lubricant levels and increased friction on gears.
- Unusual vibration or driveline shudder during acceleration: Structural fatigue in the housing can misalign the output shaft, causing uneven rotational forces that transmit through the driveline.
- Metallic debris in the transmission fluid: As the housing degrades, microscopic particles from the casting can contaminate the oil, accelerating wear on bearings and synchronizers.
- Difficulty engaging or disengaging gears: A compromised housing may allow the shift rail or fork to bind, resulting in stiff or incomplete gear changes.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4681.201.024 |
| Material | High-grade cast aluminum alloy (A356-T6) |
| Overall Length | 320 mm (12.6 in) |
| Overall Width | 210 mm (8.3 in) |
| Overall Height | 180 mm (7.1 in) |
| Weight | 4.2 kg (9.3 lbs) |
| Bolt Hole Pattern | 6x M12 on 140 mm PCD |
| Seal Bore Diameter | 85 mm (3.35 in) |
| OEM Reference | ZF 4681.201.024 |
Compatibility
This housing rear part is specifically designed for the ZF BP 210 and BP 230 transmission series. Based on its structural dimensions and bolt pattern, it is also compatible with the following ZF models that share the same rear housing architecture:
- ZF WG180 – All variants (WG180, WG180-1, WG180-2)
- ZF WG200 – Standard and heavy-duty configurations
- ZF WG210 – Direct replacement for BP 210 series units
- ZF WG230 – Direct replacement for BP 230 series units
- ZF WG250 – Early production models (verify bolt pattern)
Always cross-reference your transmission’s serial number with the OEM catalog to confirm fitment, as minor casting revisions may exist between production years.
