Overview
The ZF 4660.231.001 OIL TUBE is a precision-engineered fluid conduit designed specifically for the WG 98 Series transmission. This OEM genuine part directs pressurized hydraulic oil to the clutch packs and valve body, ensuring consistent lubrication and cooling within the gear train. The SKU 4660.231.001 identifies the exact tube geometry required for proper oil flow routing, preventing cavitation and maintaining system pressure. It mounts internally, connecting the 4660101006: TRANSMISSION HOUSING to the 4660301014: HOUSING II, forming a sealed oil circuit that is critical for heavy-duty torque transfer.
Symptoms of Failure
- External oil seepage near the housing joint: A cracked or deformed oil tube allows transmission fluid to escape, often visible as drips beneath the WG98 bell housing.
- Erratic gear engagement or delayed shifts: Insufficient oil volume reaching the clutch packs causes slipping or harsh engagement, especially under load.
- Overheating transmission fluid: Restricted flow through a damaged tube reduces cooling capacity, leading to elevated sump temperatures and potential thermal degradation of seals.
- Whining or low-pressure warning codes: A blocked or misaligned tube generates audible noise from the pump and triggers diagnostic trouble codes for low line pressure.
Technical Specifications
| Part Number | 4660.231.001 |
| Material | Seamless drawn steel with anti-corrosion coating |
| Length | 215 mm (nominal) |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 4660.231.001 |
| Sealing Method | Compression fit with O-ring grooves |
Compatibility
This oil tube is engineered for the WG 98 Series and its direct derivatives. It is compatible with the following ZF transmission models: WG180, WG200, WG98-110, and WG98-160. The part also fits select off-highway and industrial drivelines that utilize the WG98 platform. Always verify the tube routing against the 0631306174: CYLINDRICAL PIN alignment and the 0769123894: TYPE PLATE identification for exact model matching.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101006 | TRANSMISSION HOUSING | Main structural casing that encloses the gearset and oil passages |
| 4660301014 | HOUSING II | Secondary housing that supports the output shaft and oil tube connection |
| 0631306174 | CYLINDRICAL PIN | Precision alignment pin for doweling housing sections |
| 0769123894 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals oil passages during maintenance or transport |
| 4660221013 | TUBE | Secondary oil feed line for auxiliary circuits |
| 0634100317 | O-RING | Static seal for tube-to-housing interface |
| 0636103273 | CAP SCREW | Fastener securing the tube bracket to the housing |
| 0634306311 | O-RING | Dynamic seal for high-pressure oil connections |
| 4660321029 | FIXING PLATE | Retaining plate that locks the oil tube in position |
