Overview
The ZF 4616.305.052 WASHER for WG 65 is a precision-engineered, OEM genuine thrust washer designed to manage axial loads and maintain critical clearances within the planetary gear sets of ZF WG series transmissions. This component sits directly between rotating shafts and stationary housings, preventing metal-on-metal contact that would otherwise lead to rapid wear and catastrophic gear failure. The SKU 4616.305.052 is a factory-specified replacement part, ensuring exact dimensional tolerances for proper oil film distribution and load bearing. When installed alongside the 4616105413: OUTPUT shaft assembly, this washer stabilizes the drivetrain under heavy torque loads.
Symptoms of Failure
- Low transmission oil pressure warnings — A worn 4616.305.052 washer increases internal clearances, causing hydraulic fluid to bypass seals and reducing system pressure.
- Intermittent gear slipping under load — As the washer thins, planetary gear sets lose their preload, resulting in momentary loss of torque transfer during acceleration or hill climbs.
- Metallic debris in the oil pan — Abrasive wear particles from a failing thrust washer contaminate the lubricant, often requiring replacement of the 0732611049: FILTER INSERT to prevent secondary damage.
- Audible grinding or whining from the transmission housing — Excessive axial play causes gear teeth to misalign, generating noise that intensifies with higher RPMs.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4616.305.052 |
| Material | Hardened spring steel with phosphate coating |
| Outer Diameter | 52.0 mm |
| Inner Diameter | 30.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 4616.305.052 |
| Hardness | HRC 45-50 |
Compatibility
This washer is engineered for the ZF WG 65 series but also fits several other modular ZF transmissions that share the same planetary carrier architecture. Verified compatible models include the WG 65, WG 120, WG 180, and WG 200 series. It is a direct replacement for the thrust washer position between the 4616203017: OUTPUT FLANGE and the 4616101117: TRANSMISSION HOUSING. Always inspect the 0636011038: HEXAGON SCREW for thread damage during reassembly, as overtightening can distort the washer seat.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary gears to driveline |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101117 | TRANSMISSION HOUSING | Encloses gear sets and supports bearings |
| 0636011038 | HEXAGON SCREW | Secures housing and flange assemblies |
| 0636016015 | HEXAGON SCREW | M6 x 20 mm fastener for cover plates |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0634313118 | O-RING | Seals oil passages between valve body and housing |
| 0732611049 | FILTER INSERT | Traps debris from worn thrust washers |
| 0634303718 | O-RING | Output flange seal preventing external leaks |
| 0636610082 | STUD | Threaded rod for mounting transmission to bell housing |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
