Overview
The ZF 4644.301.282 TRANSMISSION HOUSING serves as the primary structural shell for the WG200 series gearbox, enclosing the planetary gear sets, clutches, and hydraulic circuits. This OEM genuine part ensures precise alignment of internal components and maintains the oil-tight integrity required for high-torque industrial applications. The SKU 4644.301.282 is a direct replacement housing designed to restore factory tolerances in ZF WG200 transmissions. It interfaces directly with the 4644101232: TRANSMISSION HOUSING to form the complete casing assembly, while the 4475280043: SCREW PLUG seals critical access ports and the 0634306198: O-RING prevents fluid migration between mating surfaces.
Symptoms of Failure
- External oil seepage from housing cracks: Hairline fractures in the casting allow transmission fluid to escape, often visible as drips beneath the bell housing area.
- Persistent gear slippage under load: Warped or distorted housing bores misalign the clutch packs, causing intermittent power loss during acceleration.
- Abnormal whining or grinding noises: Bearing bore wear in the housing creates excessive radial play, generating metallic sounds from the gear train.
- Contaminated fluid from debris ingress: A compromised housing seal allows dirt and moisture to enter the oil gallery, accelerating internal wear.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4644.301.282 |
| Material | High-strength aluminum alloy (A356-T6) |
| Dry Weight | 12.4 kg (27.3 lbs) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 280 mm |
| Bolt Hole Pattern | 12x M12 on 210 mm PCD |
| OEM Reference | ZF WG200 Series |
Compatibility
This housing is engineered for the ZF WG200 transmission family, including models WG180, WG200, and WG210. It is also compatible with select WG150 variants that share the same bell housing bolt pattern. The 0730365067: TYPE PLATE should be affixed to this housing for proper identification after installation. For complete assembly, pair with the 4644301298: COVER PLATE and the 4644106301: SHIFT SYSTEM to restore full hydraulic control.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Companion housing for dual-casing assembly |
| 4475280043 | SCREW PLUG | Seals oil drain and fill ports |
| 0634306198 | O-RING | Prevents fluid leaks at housing joints |
| 0730365067 | TYPE PLATE | Identification label for service history |
| 4644301298 | COVER PLATE | Encloses the valve body cavity |
| 4644106301 | SHIFT SYSTEM | Controls gear selection hydraulics |
| 4644306507 | COVER PLATE | Protects the rear bearing retainer |
| 4644159302 | SHIFT SYSTEM | Secondary shift actuator assembly |
| 4644306560 | VALVE BLOCK | Distributes hydraulic pressure to clutches |
| 4644306408 | WASHER | Hardened spacer for bolt torque retention |
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