Overview
The ZF 4108.108.019 INTERM.GEARBOX is a critical intermediate gearbox assembly engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part functions as a power distribution hub, transferring rotational force between the main drive shaft and the output shaft within the gear train. Positioned directly within the transmission housing, the 4108.108.019 ensures precise gear meshing and torque management during shifting operations. Its robust construction minimizes vibration and wear, making it essential for maintaining drivetrain integrity in heavy-duty industrial applications. The SKU 4108.108.019 is a direct replacement for factory-installed units, guaranteeing exact fitment and performance.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn bearings or gear teeth in the intermediate gearbox produce a distinct high-pitched whine, especially under load, signaling imminent failure.
- Intermittent gear slipping or hesitation: A failing 4108.108.019 can cause the transmission to momentarily lose power delivery, resulting in delayed acceleration or unexpected gear disengagement.
- Oil leaks around the intermediate housing: Degraded seals or cracks in the gearbox casing allow transmission fluid to escape, often pooling near the 4108101031: HOUSING or 4108303155: HOUSING.
- Metal shavings in transmission fluid: Excessive wear on the intermediate gearbox generates metallic debris, which can clog filters and damage downstream components like the 4108202004: PLANET CARRIER.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4108.108.019 |
| Product Type | Intermediate Gearbox Assembly |
| Material | Case-hardened alloy steel with nitrided gears |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 185 mm |
| Gear Diameter | 72 mm |
| Shaft Diameter | 25 mm |
| OEM Reference | ZF 4108.108.019 |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
Compatibility
This intermediate gearbox is specifically designed for ZF WG100, WG130, and WG131 transmissions. It is also compatible with select WG180 and WG200 variants that share the same gear train architecture. For proper installation, ensure the 0636302015: SCREW PLUG and 0630361037: SEALING CAP are replaced simultaneously to prevent fluid ingress. Always verify housing alignment using the 0631311009: GROOVED STUD for secure mounting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101031 | HOUSING | Encloses the intermediate gearbox assembly |
| 4108303155 | HOUSING | Secondary housing for gear support |
| 0636302015 | SCREW PLUG | Seals oil passages in the housing |
| 0630361037 | SEALING CAP | Prevents fluid leakage at shaft ends |
| 0730361010 | SEALING CAP | Alternate cap for high-temperature zones |
| 0736305007 | SCREW PLUG | Drain plug for maintenance access |
| 0634801165 | SEALING RING | Gasket between housing and gearbox |
| 0730365280 | TYPE PLATE | Identification plate for OEM traceability |
| 0631311009 | GROOVED STUD | Alignment pin for precise housing fit |
| 4108202004 | PLANET CARRIER | Distributes torque to planetary gears |
