Overview
The ZF 0730.301.870 SNAP RING is a precision-engineered retaining component designed for the WG200 and WG92 series transmissions. This OEM genuine part functions as a critical axial locking mechanism, securing internal assemblies such as gear clusters and bearing packs within the main shaft housing. The SKU 0730.301.870 is specifically positioned in the output shaft area, preventing lateral movement that could compromise gear alignment. When paired with the 4660198001 PERIPHERALS kit, this snap ring ensures consistent clamping force under high-torque conditions. Its installation is essential during any rebuild of the 4660101011 TRANSMISSION HOUSING to maintain proper preload on planetary gear sets.
Symptoms of Failure
- Oil leaks near the output flange: A fatigued snap ring can allow the bearing to shift, breaking the seal between the shaft and the 4660301018 HOUSING, leading to gradual fluid seepage.
- Intermittent gear slipping under load: When the snap ring loses its tension, axial play develops in the gear stack, causing momentary disengagement during acceleration.
- Metallic rattling from the transmission bell: A loose snap ring vibrates against its groove, producing a distinct chatter at idle or low RPM.
- Hard shifting between ranges: Misalignment from a worn snap ring affects the 0501209818 RANGE SELECTOR engagement, requiring excessive force to change gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.301.870 |
| Inner Diameter | 72.5 mm (estimated) |
| Outer Diameter | 82.0 mm (estimated) |
| Thickness | 2.5 mm (estimated) |
| Material | Spring steel, phosphate coated |
| Weight | 12 grams (estimated) |
| OEM Reference | ZF 0730.301.870 |
| Groove Width | 2.6 mm (estimated) |
Compatibility
This snap ring is engineered for the ZF WG series of powershift transmissions, specifically the WG180, WG200, WG92, WG94, and WG98 models. It is a direct fit for the output shaft bearing retention in the WG200 and WG92 series, and is also compatible with the WG90 and WG94 variants when used with the correct 4660221012 SUCTION TUBE assembly. For WG98 applications, verify groove dimensions against the 0631306174 CYLINDRICAL PIN alignment. Always replace the 0634100317 O-RING and 0636103273 CAP SCREW during installation to prevent contamination.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Seal and gasket kit for transmission rebuild |
| 0501209818 | RANGE SELECTOR | Shift fork assembly for gear range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301018 | HOUSING | Output shaft bearing support housing |
| 0631306174 | CYLINDRICAL PIN | Dowel pin for component alignment |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup tube for lubrication system |
| 0634100317 | O-RING | Static seal for fluid passages |
| 0636103273 | CAP SCREW | Fastener for housing cover retention |
| 0750100022 | SCREW PLUG | Threaded plug for drain/fill ports |
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