Overview
The ZF 4681.201.025 HOUSING REAR PART is a critical structural component engineered for the BP 210 and BP 230 series transmissions. This OEM genuine part encloses the rear section of the gearbox, providing essential support for the output shaft and bearing assembly. It serves as the primary barrier against contamination and ensures proper alignment of internal rotating elements. The SKU 4681.201.025 is precision-cast to ZF’s exacting tolerances, making it indispensable for maintaining drivetrain integrity in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4681.201.025 housing rear part begins to degrade, operators may notice several distinct warning signs. Recognizing these early can prevent catastrophic transmission damage.
- Rear oil seal leakage: A worn housing often leads to fluid weeping from the output shaft area, resulting in low transmission oil levels and potential gearbox overheating.
- Abnormal driveline vibration: Cracks or warping in the housing cause misalignment of the output bearing, producing rhythmic shaking during load shifts.
- Metallic debris in fluid: Internal fractures allow bearing fragments to contaminate the oil, visible during routine drain intervals.
- Difficulty engaging reverse gear: Structural flexing in the rear housing can interfere with shift fork travel, leading to hard or incomplete gear engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4681.201.025 |
| Material | High-grade cast iron (GGG-40) |
| Overall Length | 385 mm |
| Overall Width | 210 mm |
| Overall Height | 195 mm |
| Net Weight | 8.7 kg |
| OEM Reference | ZF 4681.201.025 |
| Bolt Hole Pattern | 6x M12 on 145 mm PCD |
| Surface Treatment | Corrosion-resistant phosphate coating |
Compatibility
This ZF 4681.201.025 housing rear part is specifically designed for the BP 210 and BP 230 series transmissions. Based on its structural dimensions and bolt pattern, it is also compatible with the following ZF drivetrain models:
- ZF WG180 (all sub-variants with rear PTO)
- ZF WG200 (standard and heavy-duty versions)
- ZF WG210 (early production runs)
- ZF Ecomid 6S-800 (when fitted with BP-series adapter)
Always verify the casting number on your existing housing before ordering. For non-standard configurations, consult your ZF service manual for cross-reference data.
