Overview
The ZF 4108.201.200 BEARING HOUSING is a precision-machined structural component designed to support and align the main shaft bearings within the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary load-bearing interface between the rotating gearset and the transmission casing, ensuring concentric rotation and proper gear mesh under high-torque conditions. As a critical housing unit, the SKU 4108.201.200 directly interfaces with the 4108101112: HOUSING and the 4108201177: HOUSING to form the complete bearing support structure. Without this component, the transmission cannot maintain shaft alignment, leading to accelerated wear on adjacent planetary gear sets.
Symptoms of Failure
- Oil leaks around the bearing housing interface: When the 4108.201.200 housing develops cracks or surface wear, transmission fluid seeps past the 0750110040: SHAFT SEAL, causing visible drips under the vehicle and low fluid levels.
- Abnormal gear whine or grinding noise: A worn bearing housing allows the main shaft to shift off-center, creating uneven gear contact that produces a distinct high-pitched whine during acceleration or deceleration.
- Vibration through the driveline: Loss of bearing support due to housing deformation transmits harmonic vibrations into the chassis, often felt as a shudder at highway speeds.
- Difficulty engaging gears or gear slippage: Misalignment caused by a compromised housing prevents the 4108301304: BEARING COVER from maintaining proper preload, leading to delayed engagement or unexpected disengagement under load.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4108.201.200 |
| Material | High-grade cast iron (GG25) with precision-ground bearing seats |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter (Bearing Seat) | 120 mm (4.72 in) |
| Overall Length | 85 mm (3.35 in) |
| Weight | 3.2 kg (7.05 lbs) |
| OEM Reference | ZF 4108.201.200 |
| Bolt Hole Pattern | 6 x M12 on 150 mm PCD |
Compatibility
This bearing housing is engineered for the ZF WG100, WG130, and WG131 series transmissions commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with select variants of the WG180 and WG200 models where the main shaft bearing diameter matches 120 mm. Always verify the housing flange pattern against the 4108306173: GASKET and the 0636302056: SCREW PLUG to ensure proper sealing and oil retention. For complete assembly, this part works with the 4108102042: INPUT shaft and the 4108302099: PLANET CARRIER to restore full transmission functionality.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101112 | HOUSING | Primary transmission casing section |
| 4108201177 | HOUSING | Intermediate housing for bearing support |
| 0636302056 | SCREW PLUG | Oil drain/fill port seal |
| 4108301304 | BEARING COVER | Protects bearing from contamination |
| 4108306173 | GASKET | Seals housing mating surfaces |
| 0750110040 | SHAFT SEAL | Prevents oil leakage at shaft exit |
| 4108102042 | INPUT | Input shaft assembly |
| 4108302099 | PLANET CARRIER | Holds planetary gears in position |
| 4108302007 | BEARINGSHEET | Bearing shim for preload adjustment |
| 0635332196 | BALL BEARING | Supports rotating shaft |
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