Overview
The ZF 4661.231.007 TUBE is a precision-engineered hydraulic fluid conduit specifically designed for the WG 94 series transmission family. This OEM genuine part serves as a critical pressure line within the valve body assembly, directing ATF to the clutch packs and shift actuators. As an original ZF component, the 4661.231.007 ensures exact fitment and material integrity, preventing cross-threading or deformation under high operating temperatures. This tube works in concert with the 4661101036 HOUSING and the 4661301094 HOUSING to maintain sealed fluid pathways. Replacing this tube with the SKU 4661.231.007 restores factory-specified flow rates and eliminates internal pressure drops that degrade shift quality.
Symptoms of Failure
- External oil seepage at the tube-to-housing interface: When the 4661.231.007 tube develops micro-cracks or O-ring groove wear, ATF drips from the transmission case, leaving visible puddles under the vehicle.
- Delayed or harsh engagement between gears: A compromised tube reduces line pressure to specific clutches, causing a noticeable lag when shifting from Neutral to Drive or Reverse.
- Erratic shift timing under load: Worn tubes allow fluid bypass, resulting in unpredictable upshifts or downshifts, particularly during highway merging or hill climbs.
- Transmission overheating due to low fluid level: Leaks from a failing 4661.231.007 tube gradually deplete the sump, increasing friction and thermal stress on internal components.
Technical Specifications
| Parameter | Value |
|---|---|
| ZF Part Number | 4661.231.007 |
| Material | Seamless drawn steel with zinc-nickel plating |
| Overall Length | 185 mm (estimated) |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 4661.231.007 |
| Seal Type | Integrated O-ring groove (O-ring not included) |
Compatibility
This tube is engineered for the ZF WG 94 series, which includes the WG94, WG180, and WG200 transmission models. It is also compatible with select WG 80 variants that share the same valve body architecture. The 4661.231.007 tube interfaces directly with the 0631306174 CYLINDRICAL PIN for alignment and the 0769123894 TYPE PLATE for identification. Always verify your transmission serial number against the WG 94 parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101036 | HOUSING | Encloses valve body and tube assembly |
| 4661301094 | HOUSING | Secondary housing for clutch feed circuits |
| 0631306174 | CYLINDRICAL PIN | Locates tube within housing bore |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Seals test port in housing |
| 4660201008 | SCREW PLUG | Closes oil gallery access hole |
| 0636100117 | SCREW PLUG | Magnetic drain plug for sump |
| 0501211384 | VALVE | Pressure regulation valve in valve body |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals accumulator piston bore |
