Overview
The ZF 4657.301.131 HOUSING REAR PART is a precision-machined structural component designed for the WG191 and WG211 series transmissions. This OEM genuine part encloses the rear section of the gear train, providing critical alignment for output shafts and supporting the hydraulic control circuits. As the primary rear casing element, it houses the final drive assembly and ensures proper lubrication flow under high-torque conditions. The SKU 4657.301.131 is manufactured to ZF’s original specifications, guaranteeing exact fitment and long service life in heavy-duty commercial vehicle applications.
Symptoms of Failure
- Rear housing oil seepage: When the 4657.301.131 develops cracks or gasket surface wear, transmission fluid may leak from the rear seal area, often visible as drips near the output flange.
- Gear train misalignment noise: A worn rear housing can cause whining or grinding sounds during acceleration, particularly in lower gears, due to compromised bearing support.
- Erratic shifting under load: If the housing distorts from thermal stress, hydraulic pressure regulation becomes inconsistent, leading to delayed or harsh gear engagements.
- Vibration at highway speeds: Structural fatigue in the rear housing allows driveline components to shift, producing noticeable vibrations through the chassis at 50+ mph.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.301.131 |
| Material | Aluminum alloy (A356-T6) |
| Weight | 8.2 kg (18.1 lbs) |
| Overall Length | 420 mm |
| Bolt Hole Pattern | 12 x M10 on 180 mm PCD |
| OEM Reference | ZF 4657.301.131 |
| Surface Treatment | Clear anodized |
Compatibility
This rear housing is engineered for ZF’s WG180, WG190, WG191, WG200, and WG211 series transmissions. It directly replaces units found in ZF 6-speed and 8-speed automatic gearboxes used in municipal buses, refuse trucks, and construction equipment. The 4657.301.131 is not compatible with earlier WG150 or WG160 series without adapter modifications. Always verify your transmission model code against the OEM parts catalog before installation.
Related Components
During a rear housing replacement, several companion parts should be inspected and replaced simultaneously. The 4657120005: PRESSURE REGULATOR controls hydraulic pressure entering the rear circuit. The 0501211384: VALVE manages fluid routing within the housing. The 0630532183: INDENTED RING secures the output shaft bearing. The 4656306145: PISTON actuates the rear clutch pack. These components work together to ensure proper sealing and hydraulic function.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to rear circuits |
| 0501211384 | VALVE | Directs fluid flow within housing |
| 0630532183 | INDENTED RING | Secures output shaft bearing |
| 4656306145 | PISTON | Actuates rear clutch pack |
| 0732042767 | COMPRESSION SPRING | Provides return force for valve spools |
| 0631612064 | SET SCREW | Locks adjustment mechanisms |
| 0631610026 | SET SCREW | Secures housing alignment pins |
| 4657101049 | TRANSMISSION HOUSING | Main casing assembly |
| 4657301130 | HOUS.FRONT SECT | Front section of transmission casing |
| 0631306816 | CYLINDRICAL PIN | Aligns housing halves during assembly |
Frequently Asked Questions
Q: Can the 4657.301.131 be repaired if cracked?
A: Welding aluminum transmission housings is not recommended due to thermal distortion risks. Replacement with a new OEM part ensures proper sealing and bearing alignment.
Q: What torque specification applies to the housing bolts?
A: ZF specifies 45 Nm (33 ft-lbs) for M10 bolts in the rear housing pattern, applied in a cross-sequence pattern to prevent warping.
Q: How does a failing rear housing affect transmission fluid temperature?
A: A compromised housing allows hot oil to bypass coolers, potentially raising operating temperatures by 15-20°C and accelerating fluid degradation.
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ZF 4657.301.131 HOUSING REAR PART – Housing RFQ Support
PartsZF helps B2B buyers source ZF 4657.301.131 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 4657.301.131 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657033001
- Documentation reference: 4657033002
- Documentation reference: 4657033003
- Documentation reference: 4657033005
- 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 | 4657.301.131 |
|---|---|
| Normalized SKU | 4657301131 |
| Part name | HOUSING REAR PART |
| Product category | housing |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. 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.
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