Overview
The ZF 0630.004.029 SHIM RING is a precision-engineered adjustment component designed for the WG 100 and WG 201 series transmissions. This OEM genuine part functions as a critical axial spacer, controlling the end-play and preload within the planetary gearset assembly. By ensuring exact clearance between rotating and stationary components, the shim ring prevents excessive gear movement and maintains optimal load distribution under high-torque conditions. The SKU 0630.004.029 is manufactured to factory tolerances, guaranteeing a perfect fit when paired with the 4644101160: TRANSMISSION HOUSING or the 4644301323: TRANSMISSION HOUSING. Without this shim ring, the internal geometry of the transmission becomes unstable, leading to accelerated wear on adjacent bearings and clutches.
Symptoms of Failure
- Audible gear rattle or whining noise during acceleration: A worn 0630.004.029 shim ring allows excessive axial play, causing gear teeth to clash under load. This symptom is often misdiagnosed as a bearing failure.
- Intermittent gear slippage in higher ranges: When the shim ring loses its calibrated thickness, the clutch pack clearance increases, resulting in delayed engagement and power loss, particularly in WG200 series transmissions.
- Oil seepage around the transmission housing joint: Excessive end-play from a collapsed shim ring can distort the housing seal surface, leading to fluid migration past the 4475280043: SCREW PLUG and adjacent gaskets.
- Vibration at idle or low RPM: A degraded shim ring fails to dampen torsional vibrations, transferring harmonics through the driveline. This is a common long-tail search query for “ZF transmission shim ring vibration fix.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0630.004.029 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 52.5 mm |
| Thickness | 1.50 mm (selective fit range: 1.45–1.55 mm) |
| Weight | 0.018 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 0630.004.029 |
| Hardness | 58–62 HRC |
Compatibility
This shim ring is specifically engineered for the ZF WG 100 and WG 201 transmission families. It is a direct replacement in the WG180, WG200, WG210, and WG211 models. The part is also compatible with the WG101 and WG202 variants where the planetary carrier stack height requires adjustment. Always verify the existing shim thickness before installation; the 0630.004.029 is typically used in the second planetary gearset position. For housing assembly, ensure the 4644301189: THREADED BUSH is torqued to specification to prevent distortion of the shim ring seat.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for WG100 series |
| 4644301323 | TRANSMISSION HOUSING | Main structural casing for WG201 series |
| 4644301189 | THREADED BUSH | Provides threaded anchor for housing bolts |
| 4475280043 | SCREW PLUG | Seals oil passages in the housing |
| 0634306198 | O-RING | Seals the shim ring cavity against fluid loss |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Protects the shim ring access port |
| 0636100621 | HEXAGON SCREW | Fastens the cover plate to the housing |
| 0631610020 | SET SCREW | Locks the shim ring in position |
| 0501218540 | BREATHER | Vents pressure from the transmission case |
