Overview
The ZF 4660.306.173 NOZZLE is a precision-engineered fluid metering component designed specifically for the WG 98 series transmission family. This OEM genuine part controls the flow and pressure of transmission fluid within the hydraulic control circuit, ensuring consistent clutch engagement and smooth gear shifts. Positioned within the valve body assembly, the 4660.306.173 nozzle works in concert with the 4950101004 HOUSING and the 4950301018 HOUSING I to maintain precise lubrication and cooling pathways. As a direct OEM replacement, this SKU guarantees exact fitment and factory-specified flow characteristics for your ZF transmission rebuild.
Symptoms of Failure
- Erratic gear engagement or delayed shifting — A worn or clogged nozzle disrupts hydraulic pressure, causing hesitation when shifting from neutral to drive or between forward gears.
- Transmission fluid leaks near the valve body area — Cracks or deformation in the nozzle body can allow pressurized oil to escape, leading to low fluid levels and potential overheating.
- Inconsistent clutch pack pressure — When the nozzle fails to meter flow correctly, clutch packs may slip under load, producing a noticeable shudder during acceleration.
- Abnormal whining or buzzing from the transmission — Restricted fluid flow through a damaged nozzle creates cavitation noise, often audible at idle or low speeds.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.306.173 |
| Material | Hardened steel with corrosion-resistant coating |
| Overall Length | 32.5 mm |
| Outer Diameter | 12.0 mm |
| Orifice Diameter | 1.8 mm |
| Weight | 18 g |
| OEM Reference | ZF 4660.306.173 |
| Seal Compatibility | Use with 0734309932 SHAFT SEAL |
Compatibility
This nozzle is engineered for the ZF WG 98 series, including the WG98, WG120, WG150, WG180, and WG200 models. It is a direct fit for transmissions equipped with the 4660101023 TRANSMISSION HOUSING. Always verify your transmission model and housing configuration before installation. For heavy-duty applications, pairing this nozzle with the correct 0734309932 SHAFT SEAL ensures leak-free operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4950101004 | HOUSING | Encloses valve body components |
| 4950301018 | HOUSING I | Supports nozzle and seal alignment |
| 0734309932 | SHAFT SEAL | Prevents fluid leakage at shaft interface |
| 4660101023 | TRANSMISSION HOUSING | Main structural housing for gear train |
| 4660301058 | HOUSING | Secondary housing for oil distribution |
| 0631306174 | CYLINDRICAL PIN | Aligns housing components |
| 0750100022 | SCREW PLUG | Seals oil passages |
| 4660301009 | BRACKET | Mounts transmission to chassis |
| 4660221039 | TUBE | Conducts fluid between components |
| 0636103274 | CAP SCREW | Secures housing assemblies |
