Overview
The ZF 0501.211.769 TUBE is a precision-engineered hydraulic fluid conduit designed for the WG200 and WG201 transmission series. This OEM genuine part serves as a critical pressure line within the valve body assembly, directing ATF (Automatic Transmission Fluid) to the clutch packs and torque converter circuit. Constructed from corrosion-resistant steel, the tube ensures consistent hydraulic flow under high thermal loads. The SKU 0501.211.769 is factory-machined to exact ZF tolerances, preventing cross-threading or deformation during installation. When paired with a properly sealed 4644105414 DISCONNECTION unit, this tube maintains system integrity during gear shifts.
Symptoms of Failure
- Hydraulic fluid seepage at tube junctions – Cracked or fatigued tube ends cause visible oil drips near the valve body, often mistaken for pan gasket leaks.
- Delayed engagement or gear hunting – A compromised tube reduces line pressure, leading to soft shifts or erratic gear selection in WG200 transmissions.
- Overheating transmission fluid – Restricted flow through a deformed tube starves the torque converter, triggering thermal warnings on long hauls.
- Audible whining from the pump – Air ingestion through a fractured tube creates cavitation noise, particularly under load in WG201 models.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.211.769 |
| Material | Seamless cold-drawn steel (DIN 2391) |
| Length | 215 mm ± 0.5 mm |
| Outer Diameter | 12.0 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.085 kg |
| Surface Finish | Zinc-nickel plated (ISO 2081) |
| OEM Reference | ZF 0501.211.769 |
| Seal Compatibility | Works with 0634306525 O-RING |
Compatibility
This tube is engineered for the ZF WG200 and WG201 series, including the WG180 variant when used with the 4644303409 OUTPUT FLANGE adapter. It directly interfaces with the 4644101222 TRANSMISSION HOUSING and secures via 0636021083 HEXAGON SCREW fasteners. The part is not backward-compatible with WG120 or earlier series due to port spacing differences. For WG200/201 rebuilds, always inspect the tube bore for scoring before reuse.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105414 | DISCONNECTION | Hydraulic quick-disconnect for clutch circuit |
| 4644303409 | OUTPUT FLANGE | Driveshaft mounting interface |
| 0636021083 | HEXAGON SCREW | M10 bolt for tube bracket retention |
| 4644101222 | TRANSMISSION HOUSING | Main structural casing |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant for WG201 |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for tube positioning |
| 4644301298 | COVER PLATE | Protective shield over valve body |
| 0634306525 | O-RING | Seal for tube-to-housing connection |
| 0636305026 | SCREW PLUG | Drain port closure for maintenance |
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