Overview
The ZF 4657.101.048 TRANSMISSION HOUSING is the structural backbone of the WG211 series gearbox. This OEM genuine part encloses the planetary gear sets, valve bodies, and hydraulic circuits, ensuring precise alignment and oil containment under high torque loads. As the primary casing, it absorbs torsional stresses and maintains internal pressure integrity. The SKU 4657.101.048 is engineered to ZF’s original specifications, making it a direct replacement for failed or cracked housings in heavy-duty off-highway and industrial transmissions.
Symptoms of Failure
- External oil seepage from housing seams: Cracks or porosity in the casting allow transmission fluid to escape, often visible as drips near the bell housing or PTO mounting points.
- Gear engagement hesitation or slipping: A warped housing distorts shaft centerlines, causing misalignment between the 4657120005: PRESSURE REGULATOR and clutch packs, leading to delayed shifts.
- Metallic debris in the oil pan: Internal fractures shed aluminum particles that circulate through the 0501211384: VALVE, accelerating wear on the 4656306145: PISTON assemblies.
- Abnormal vibration at idle: A compromised housing loses its dampening capacity, transmitting gear noise directly to the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.101.048 |
| Material | High-grade aluminum alloy (A356-T6) |
| Dry Weight | 14.2 kg (31.3 lbs) |
| Overall Length | 485 mm |
| Bolt Hole Pattern | 12-point, M12 x 1.5 |
| OEM Reference | ZF 4657.101.048 |
| Max Operating Pressure | 18 bar (261 psi) |
Compatibility
This housing is specifically designed for the ZF WG211 series, but it also fits earlier WG180 and WG200 variants with minor adapter modifications. It is compatible with all WG211 sub-models including WG211-2, WG211-3, and WG211-4. The housing interfaces directly with the 0630532183: INDENTED RING to seal the main shaft bore, and it provides mounting points for the 4657120005: PRESSURE REGULATOR and 0501211384: VALVE assemblies. Always verify your transmission’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to clutch packs |
| 0501211384 | VALVE | Directs oil flow for shift timing |
| 0630532183 | INDENTED RING | Seals main shaft bore against leakage |
| 4656306145 | PISTON | Applies clamping force to clutch discs |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Locks valve body alignment |
| 0631610026 | SET SCREW | Secures pressure regulator bore |
| 4657301061 | HOUS.FRONT SECT | Front half of split-case housing |
| 4657301062 | HOUSING REAR PART | Rear half of split-case housing |
| 0631306816 | CYLINDRICAL PIN | Aligns housing halves during assembly |
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