Overview
The ZF 4657.301.173 HOUSING REAR PART is a precision-machined structural component designed for the WG191 and WG211 series transmissions. This OEM genuine part forms the aft section of the transmission casing, enclosing the output shaft assembly and providing critical support for the rear bearing set. As a load-bearing housing element, it ensures proper alignment of internal rotating components and maintains the integrity of the lubrication circuit. The SKU 4657.301.173 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life when paired with the 4657101087: TRANSMISSION HOUSING and the 4657301172: HOUS.FRONT SECT.
Symptoms of Failure
- Rear seal oil leakage: A worn or cracked rear housing often leads to fluid seeping from the transmission tail, visible as drips under the vehicle after parking. This is a common search query for “ZF WG211 rear oil leak repair.”
- Output shaft vibration: When the housing bore becomes distorted or the mounting face degrades, the output shaft can develop excessive play, causing driveline shudder during acceleration or deceleration.
- Gear engagement hesitation: Misalignment of the rear housing can shift the position of the speed sensor or valve body interface, resulting in delayed or harsh shifting—often searched as “ZF transmission slipping after housing replacement.”
- Metallic debris in fluid: Fractures in the housing casting can release aluminum particles into the transmission fluid, contaminating the filter and causing premature wear on clutches and bearings.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.301.173 |
| Material | Aluminum Alloy (A356-T6) |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 285 mm |
| Mounting Bolt Pattern | 8 x M10 on 160 mm PCD |
| OEM Reference | ZF 4657.301.173 |
| Surface Treatment | Clear Anodized |
Compatibility
This rear housing is engineered for the ZF WG191 and WG211 series transmissions, which are commonly found in medium-duty trucks, buses, and off-highway equipment. Based on the part type and mounting geometry, it is also compatible with the WG180 and WG200 variants that share the same rear bell housing pattern. For proper assembly, this component must be installed with the 0631306816: CYLINDRICAL PIN for precise alignment and secured using the 0636102489: CAP SCREW fasteners.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Main casing that encloses the gearset and valve body |
| 4657301172 | HOUS.FRONT SECT | Front section of the transmission housing for input shaft support |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for precise alignment of housing halves |
| 0636102489 | CAP SCREW | M10 bolt for securing rear housing to main casing |
| 4656301148 | FIXING PLATE | Retaining plate for output shaft bearing |
| 0636102463 | CAP SCREW | M8 bolt for fixing plate attachment |
| 4657201133 | SCREEN SHEET | Fine mesh filter for oil pump intake |
| 0636115287 | CAP SCREW | M6 bolt for screen sheet retention |
| 4657301065 | PLATE | Oil baffle plate for lubrication control |
| 4657201032 | SUCTION TUBE | Oil pickup tube from pan to pump |
Frequently Asked Questions
Q: Can I reuse the old gasket when installing this rear housing?
A: No. ZF recommends always replacing the gasket and O-rings when installing a new housing. The sealing surfaces on the 4657.301.173 require a fresh gasket to prevent oil leaks and ensure proper clamping force.
Q: Is this housing compatible with the WG211 without modifications?
A: Yes, it is a direct OEM replacement for WG211 transmissions. However, verify that your transmission has the 8-bolt rear pattern; some early WG180 units used a 6-bolt pattern and would require the 4657301172: HOUS.FRONT SECT adapter kit.
Q: What torque specification should I use for the cap screws?
A: Tighten the 0636102489: CAP SCREW fasteners to 45 Nm (33 ft-lbs) in a crosswise pattern. Always use a torque wrench to avoid distorting the housing.
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Phone: +86 158 2286 3467 |
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ZF 4657.301.173 HOUSING REAR PART – Housing RFQ Support
PartsZF helps B2B buyers source ZF 4657.301.173 HOUSING REAR PART with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This housing page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4657.301.173 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657033305
- Documentation reference: 4657034301
- Documentation reference: 4657063301
- Documentation reference: 4657063302
- Illustration section: TRANSMISSION HOUSING
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4657.301.173 |
|---|---|
| Normalized SKU | 4657301173 |
| Part name | HOUSING REAR PART |
| Product category | housing |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: diagram. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 4656.306.195 HOUSING
- ZF 4657.298.102 HOUSING REAR SECTION
- ZF 4646.101.190 TRANSMISSION HOUSING
- ZF 4646.301.314 HOUSING
- ZF 4644.301.402 TRANSMISSION HOUSING
