Overview
The ZF 0730.150.778 THRUST WASHER is a precision-engineered component designed for the WG 181 Series transmission. This OEM genuine part functions as a critical axial bearing surface, positioned between rotating gear sets and stationary housing elements within the planetary gear train. Its primary role is to manage end-play and absorb thrust loads generated during gear shifts and torque conversion, preventing metal-on-metal contact that leads to premature wear. The SKU 0730.150.778 is manufactured to exact ZF tolerances, ensuring consistent oil film retention and load distribution across the assembly.
Symptoms of Failure
When the 0730.150.778 thrust washer degrades, operators may notice these specific failure indicators:
- Erratic gear engagement and delayed shifting – Worn thrust surfaces allow excessive axial play, causing planetary gears to misalign and slip under load.
- Low transmission oil pressure warnings – A failing washer can obstruct oil galleries, reducing hydraulic pressure needed for clutch packs.
- Metallic grinding noise during acceleration – Thinned washer material permits direct contact between hardened steel components, generating audible debris.
- Visible metal particles in transmission fluid – Advanced wear sheds bronze or steel fragments that contaminate the entire hydraulic circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.150.778 |
| Material | Phosphor bronze / steel-backed composite |
| Inner Diameter | 73.0 mm |
| Outer Diameter | 150.0 mm |
| Thickness | 2.78 mm |
| Weight | 0.185 kg |
| OEM Reference | ZF 0730.150.778 |
| Surface Finish | Ground, oil-retention grooves |
Compatibility
This thrust washer is engineered for the ZF WG 181 transmission series and is also compatible with closely related models including the WG 180, WG 200, and WG 211 series. It is a direct replacement for units requiring axial clearance restoration in planetary gear sets. Always verify fitment with your specific transmission serial number before installation.
During replacement, technicians often inspect or replace adjacent components such as the 4644101047 TRANSMISSION HOUSING for cracks, the 4644301380 HOUSING for wear, and the 4644301189 THREADED BUSH for thread damage. The 0730365067 TYPE PLATE should also be verified to ensure correct model identification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101047 | TRANSMISSION HOUSING | Encloses gear train, supports bearings |
| 4644301380 | HOUSING | Intermediate casing for clutch assembly |
| 4644301189 | THREADED BUSH | Provides threaded anchor for fasteners |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Locating pin for alignment |
| 4644301161 | COVER PLATE | Seals access opening |
| 0636100621 | HEXAGON SCREW | Secures housing components |
| 0631610020 | SET SCREW | Adjusts preload on thrust surfaces |
| 0634801098 | SEALING RING | Prevents fluid leakage at joints |
| 4644301117 | FIXING PLATE | Retains washer in position |
