Overview
The ZF 4657.301.062 HOUSING REAR PART is a critical structural component designed specifically for the WG211 series of heavy-duty automatic transmissions. This OEM genuine part forms the rear enclosure of the transmission casing, providing essential support for the output shaft assembly and sealing the internal hydraulic circuits. The housing rear part (SKU: 4657.301.062) works in conjunction with the main transmission housing to maintain proper alignment of planetary gear sets and torque converter components. As a precision-machined aluminum casting, it ensures dimensional stability under extreme thermal and mechanical loads encountered in construction, mining, and municipal vehicles.
Symptoms of Failure
- Rear main seal oil leaks: A cracked or warped housing rear part often causes transmission fluid to seep from the output shaft area, leaving puddles under the vehicle and leading to low fluid levels.
- Gear slipping under load: When the housing rear part loses its structural integrity, the output shaft bearing support degrades, resulting in intermittent power loss during acceleration or climbing.
- Abnormal drivetrain noise: Worn housing bores produce a distinct whining or grinding sound from the rear of the transmission, particularly noticeable at highway speeds or during deceleration.
- Vibration during shifting: A compromised housing rear part allows excessive axial play in the output shaft, causing harsh engagement and vibration when the transmission shifts between forward gears.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.301.062 |
| Material | High-strength aluminum alloy (A356-T6) |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 285 mm |
| Overall Width | 210 mm |
| Bolt Hole Pattern | 12x M12 on 180 mm PCD |
| Surface Finish | Anodized, machined sealing surfaces |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This housing rear part is engineered for the ZF WG211 series transmission, which is widely used in off-highway vehicles. Based on its design and mounting interface, the 4657.301.062 is also compatible with the following ZF transmission models: WG180, WG200, WG210, and WG220. It is a direct replacement for earlier housing variants in these series, provided the vehicle uses the same output flange configuration. Always verify the transmission serial number before installation to ensure proper fitment with the 4657101048: TRANSMISSION HOUSING and the 4657301061: HOUS.FRONT SECT.
During assembly, this housing rear part integrates with several precision components. The 4657120005: PRESSURE REGULATOR controls hydraulic pressure within the rear circuit, while the 0501211384: VALVE modulates fluid flow to the clutch packs. A 0630532183: INDENTED RING secures the output shaft bearing in place, and the 4656306145: PISTON actuates the rear clutch assembly. Proper torque on all fasteners, including the 0631612064: SET SCREW and 0631610026: SET SCREW, is critical to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure in rear circuit |
| 0501211384 | VALVE | Modulates fluid flow to clutch packs |
| 0630532183 | INDENTED RING | Secures output shaft bearing |
| 4656306145 | PISTON | Actuates rear clutch assembly |
| 0732042767 | COMPRESSION SPRING | Provides return force for valve spools |
| 0631612064 | SET SCREW | Locks adjustment mechanisms |
| 0631610026 | SET SCREW | Secures housing alignment pins |
| 4657101048 | TRANSMISSION HOUSING | Main casing for gear train |
| 4657301061 | HOUS.FRONT SECT | Front section of transmission housing |
| 0631306816 | CYLINDRICAL PIN | Aligns housing sections during assembly |
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