Overview
The ZF 0501.225.647 VIBR.ABSORBER is an OEM genuine vibration damping component engineered specifically for the WG 211 Series transmission. This precision-machined absorber is installed within the driveline assembly to neutralize torsional vibrations and harmonic oscillations generated during gear shifts and load changes. By reducing resonant frequencies, the 0501.225.647 protects critical internal assemblies, including the TRANSMISSION HOUSING, from fatigue stress. The SKU 0501.225.647 is a direct OEM replacement, ensuring exact fitment and material compatibility for long service intervals.
Symptoms of Failure
- Excessive driveline vibration at highway speeds: A worn VIBR.ABSORBER fails to dampen harmonics, causing noticeable shaking in the cab or chassis during steady-state cruising.
- Abnormal gear engagement noise: When the absorber loses elasticity, you may hear a low-frequency rumble or clunking during upshifts and downshifts, indicating unchecked torsional loads.
- Premature wear on adjacent housing components: Unabsorbed vibrations accelerate fatigue on the HOUS.FRONT SECT and HOUSING REAR PART, often leading to hairline cracks or misalignment.
- Oil seepage near the damper mounting point: As the absorber degrades, its seal surface can distort, allowing transmission fluid to weep past the CYLINDRICAL PIN retention area.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 0501.225.647 |
| OEM Reference | ZF 0501.225.647 |
| Material | High-tensile steel with elastomeric damping core |
| Outer Diameter | 120 mm (estimated) |
| Inner Diameter | 45 mm (estimated) |
| Thickness | 28 mm (estimated) |
| Weight | 1.4 kg (3.1 lbs) |
| Operating Temperature Range | -40°C to +120°C |
| Hardness Rating | Shore A 70 ±5 |
Compatibility
This VIBR.ABSORBER is primarily designed for the ZF WG 211 Series transmission family. Based on its damping characteristics and mounting geometry, it is also compatible with the following ZF models: WG180, WG200, WG210, and WG211. It is not recommended for use in older WG120 or WG150 series units without verifying bolt pattern alignment. Always confirm fitment against your transmission’s serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657301130 | HOUS.FRONT SECT | Front section housing input shaft bearings |
| 4657301131 | HOUSING REAR PART | Rear section enclosing output shaft assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636102489 | CAP SCREW | Fastener for absorber mounting bracket |
| 4656301148 | FIXING PLATE | Retainer plate for vibration damper |
| 0636102463 | CAP SCREW | Hex bolt for front housing attachment |
| 4657201133 | SCREEN SHEET | Oil filter mesh for sump protection |
| 0636115287 | CAP SCREW | Flanged bolt for rear housing |
| 4657301065 | PLATE | Spacer plate for damper stack |
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