Overview
The ZF 4616.131.013 FILLER NOZZLE is a precision-engineered fluid delivery component designed exclusively for the WG 65 series transmission. This OEM genuine part directs hydraulic oil into the torque converter and lubrication circuits, ensuring consistent pressure and flow within the gearbox. The SKU 4616.131.013 sits at the transmission housing interface, where it mates with the main oil gallery to prevent cavitation and maintain thermal stability. Without this nozzle, the transmission cannot achieve proper fill rates during shifting, leading to performance degradation.
Symptoms of Failure
- Hydraulic oil seepage around the filler nozzle – A worn 4616.131.013 often causes visible oil leaks at the connection point, especially after cold starts. This is a common long-tail search query for “ZF WG65 filler nozzle oil leak.”
- Delayed or harsh gear engagement – When the nozzle fails to meter oil correctly, the transmission may slip or engage abruptly, particularly when shifting from neutral to drive. Users searching “WG65 transmission slipping fix” frequently encounter this issue.
- Overheating transmission fluid – A clogged or deformed filler nozzle restricts oil flow, causing the transmission to run hotter than normal. This symptom is often searched as “ZF transmission overheating causes.”
- Whining noise from the pump area – Insufficient oil delivery due to a faulty nozzle creates cavitation noise, audible as a high-pitched whine during acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.131.013 |
| Material | Hardened steel with zinc-nickel plating |
| Overall Length | 48 mm |
| Thread Size | M14 x 1.5 |
| Hex Size | 19 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4616.131.013 |
| Seal Type | Integrated O-ring groove |
Compatibility
This filler nozzle is engineered for the ZF WG65 series, but it also fits several related heavy-duty transmissions. Compatible models include the WG180, WG200, WG250, and WG300 series, all of which share the same oil gallery interface. For proper installation, ensure the nozzle is paired with the correct 4616105402 OUTPUT shaft and 4005303005 OUTPUT FLANGE to maintain alignment. The 4616101119 TRANSMISSION HOUSING must be free of cracks or wear where the nozzle seats. Secure the assembly using the 0636011038 HEXAGON SCREW to prevent vibration loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105402 | OUTPUT | Transfers torque from transmission to driveline |
| 4005303005 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101119 | TRANSMISSION HOUSING | Encloses gear train and oil passages |
| 0636011038 | HEXAGON SCREW | Secures filler nozzle to housing |
| 0636011118 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636016015 | HEXAGON SCREW | Mounts transmission to bellhousing |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals filler nozzle to prevent leaks |
| 0636304019 | SCREW PLUG | Closes oil test ports |
| 0634801152 | SEALING RING | Provides static seal under screw head |
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