Overview
The ZF 0730.161.361 RING is a precision-engineered sealing and alignment component specifically designed for the WG150 series transmission. This OEM genuine part sits within the planetary gear set assembly, functioning as a critical interface between rotating elements to maintain hydraulic pressure integrity and prevent cross-contamination of transmission fluid. As an original ZF component, the 0730.161.361 RING ensures exact dimensional tolerances required for optimal clutch pack engagement and torque converter lockup performance. When installed alongside a TRANSMISSION HOUSING (4642101108) or a TRANSMISSION HOUSING (4642301208), this ring completes the hydraulic circuit necessary for smooth gear transitions.
Symptoms of Failure
- Hydraulic pressure loss during acceleration – A worn 0730.161.361 RING allows fluid to bypass the intended channels, causing delayed engagement or “slipping” when the transmission shifts under load. This is often misdiagnosed as a failing solenoid.
- Visible oil seepage around the bell housing – When the ring loses its sealing elasticity, ATF can migrate past the SEALING CAP (0630361029) and accumulate on the exterior of the transmission case.
- Erratic shift timing in cold weather – A degraded ring cannot maintain consistent backpressure, leading to harsh or delayed shifts until the transmission reaches operating temperature.
- Metallic debris in the transmission pan – As the ring wears against the GROOVED STUD (0631311009), microscopic particles can contaminate the fluid, accelerating wear on other internal components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.161.361 |
| Material | Nitrile rubber (NBR) with steel reinforcement |
| Inner Diameter | 38.5 mm |
| Outer Diameter | 52.0 mm |
| Thickness | 4.2 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 0730.161.361 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This ZF 0730.161.361 RING is engineered for the WG150 series transmission family. Based on its sealing ring design and dimensional profile, it is also compatible with the following ZF models: WG180, WG200, and WG250 series transmissions manufactured between 2005 and 2020. It is not suitable for the older WG120 series or the newer WG300 series without verification of the TYPE PLATE (0730365125) specifications. Always confirm your transmission’s serial number against the OEM parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses the gear train and supports bearing alignment |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG150 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model verification |
| 0631311009 | GROOVED STUD | Locating pin for ring alignment during assembly |
| 4642301168 | SCREEN SHEET | Filter mesh protecting hydraulic passages from debris |
| 4642301169 | SCREEN SHEET | Alternate filter screen for high-flow applications |
| 0636100621 | HEXAGON SCREW | Fastener for securing housing sections |
| 0630361029 | SEALING CAP | Prevents fluid leakage at pressure test ports |
| 4642306254 | ADAPTER | Interface component for torque converter mounting |
| 0634303340 | O-RING | Static seal for hydraulic circuit connections |
