Overview
The ZF 4651.353.031 BUSH is a precision-engineered bearing component designed for the WG 100 series transmission. This OEM genuine part functions as a critical wear surface within the planetary gear assembly, reducing friction between rotating shafts and stationary housings. The bushing absorbs radial loads and maintains precise shaft alignment during high-torque operations. Installed directly inside the TRANSMISSION HOUSING (4651101006), it ensures smooth power transfer through the gear train. The SKU 4651.353.031 is manufactured to ZF’s original specifications, guaranteeing exact fitment and material composition for long service intervals in heavy-duty commercial vehicles.
Symptoms of Failure
- Oil leaks around the transmission housing: Worn bushings create excessive clearance, allowing pressurized transmission fluid to escape past seals. This often manifests as drips near the HOUSING (4651301034) interface.
- Gear slipping under load: When the bushing wears beyond tolerance, shaft misalignment causes incomplete gear engagement, resulting in intermittent power loss during acceleration or climbing.
- Metallic grinding noises from the transmission: Degraded bushing material allows metal-on-metal contact between the shaft and housing, producing a distinct whining or grinding sound at specific RPM ranges.
- Vibration in the driveline: Uneven bushing wear creates rotational imbalance, transmitting noticeable vibrations through the chassis during highway speeds.
Technical Specifications
| Part Number | 4651.353.031 |
| Inner Diameter | 35.0 mm |
| Outer Diameter | 42.0 mm |
| Length | 31.0 mm |
| Material | Bronze-steel composite (sintered) |
| Weight | 0.12 kg |
| OEM Reference | ZF 4651.353.031 |
| Hardness | HRB 80-90 |
| Operating Temperature | -40°C to +120°C |
Compatibility
This bushing is specifically engineered for the ZF WG 100 series transmission family. It directly replaces the original component in WG100, WG120, WG150, WG180, and WG200 models manufactured between 2005 and 2020. The part also fits select WG 300 series variants when used with the appropriate HOUSING (4651301013) adapter. Always verify compatibility by cross-referencing your transmission’s serial number with the OEM parts catalog. For installations requiring seal replacement, use the O-RING (0634303928) to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4651301034 | HOUSING | Intermediate housing for clutch pack |
| 0634303928 | O-RING | Seals fluid between housing sections |
| 4651301013 | HOUSING | Rear housing for output shaft support |
| 4651301015 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4651301035 | SCREEN SHEET | Secondary filtration element |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 4475280060 | SCREW PLUG | Threaded plug for drain/fill ports |
| 0634303312 | O-RING | Seals screw plug connections |
| 0630361063 | SEALING CAP | High-pressure port sealing cap |
