Overview
The ZF 0730.501.884 RETAINING RING is a precision-engineered axial locking component designed for the WG 94 series transmission family. This OEM genuine part secures critical assemblies—such as bearing packs and gear clusters—against axial displacement within the main shaft housing. The SKU 0730.501.884 corresponds to a specific snap-ring profile that fits into a machined groove inside the 4661101037: TRANSMISSION HOUSING and the 4661301099: HOUSING II, ensuring that rotating elements remain correctly positioned under high torque and thermal expansion. Without this retaining ring, the entire gear train can shift, leading to catastrophic internal contact.
Symptoms of Failure
- Intermittent gear slippage under load: When the retaining ring loses its spring tension or fractures, the shaft assembly can drift axially, causing gears to partially disengage during heavy acceleration.
- Metallic grinding noise from the transmission housing: A worn or broken 0730.501.884 ring allows bearing races to walk, producing a distinct scraping sound that worsens as the transmission warms up.
- Sudden loss of oil pressure accompanied by leaks: Axial movement of the shaft can misalign the oil pump drive, leading to pressure drops and seepage past seals in the 0631306174: CYLINDRICAL PIN interface.
- Vibration in neutral or park: A fatigued retaining ring permits the input shaft to oscillate, transmitting vibration through the 0769123894: TYPE PLATE and into the vehicle chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0730.501.884 |
| Material | Spring steel (DIN 17222), phosphate coated |
| Inner Diameter (nominal) | 72.0 mm |
| Outer Diameter (nominal) | 88.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.501.884 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This retaining ring is a direct fit for the ZF WG 94 series of powershift transmissions. It is also used in the following models where the same shaft groove dimensions apply: WG180, WG200, and WG250. Always verify the groove width and shaft diameter against your transmission’s service manual before installation. The ring interfaces directly with the 4661101037: TRANSMISSION HOUSING and 4661301099: HOUSING II to maintain axial tolerance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101037 | TRANSMISSION HOUSING | Main structural casing that houses gear sets and shafts |
| 4661301099 | HOUSING II | Secondary housing section for clutch and valve assembly |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing registration |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial and model data |
| 0750100022 | SCREW PLUG | Seals oil passages in the valve body |
| 4660201008 | SCREW PLUG | Magnetic drain plug for ferrous debris capture |
| 0636100117 | SCREW PLUG | Hexagonal plug for pressure test ports |
| 0501211384 | VALVE | Modulating valve for clutch pressure control |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals the governor pressure port |
