Overview
The ZF 4644.231.171 OIL LEVEL TUBE is a precision-engineered component designed specifically for the WG200 series transmission. This OEM genuine part ensures accurate fluid level monitoring within the transmission sump, preventing both overfilling and underfilling that can compromise gearbox performance. Positioned vertically within the transmission housing, the tube provides a reliable conduit for dipstick measurement, allowing maintenance technicians to verify oil levels quickly during routine service intervals. The SKU 4644.231.171 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal when installed alongside the 4644101164 TRANSMISSION HOUSING and the 4644301371 TRANSMISSION HOUSING.
Symptoms of Failure
- Visible oil leaks around the tube base: A cracked or warped oil level tube allows transmission fluid to seep past the O-ring seal, leaving puddles under the vehicle. This is a common failure point in high-mileage WG200 units.
- Inaccurate dipstick readings leading to gear slipping: When the tube becomes distorted or blocked, the dipstick cannot seat properly, causing false low or high oil level indications. This often results in gear slipping or harsh shifting due to incorrect fluid volume.
- Fluid contamination from debris ingress: A broken tube can allow dirt and moisture to enter the transmission through the dipstick opening, accelerating wear on internal components like the 0631311009 GROOVED STUD and clutch packs.
- Difficulty inserting or removing the dipstick: Bent or corroded tubes create friction that makes routine oil checks frustrating, often leading to neglected maintenance.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.231.171 |
| Material | Steel with anti-corrosion coating |
| Overall Length | Approx. 320 mm |
| Tube Inner Diameter | 12 mm |
| Weight | 0.15 kg |
| OEM Reference | ZF 4644.231.171 |
| Seal Type | Integrated O-ring groove |
Compatibility
This oil level tube is engineered for the ZF WG200 series transmissions, including models WG180, WG200, and WG210. It directly replaces the original factory-installed tube and is compatible with both early and late production variants. The part integrates seamlessly with the 0730365067 TYPE PLATE for proper identification and fits all WG200 housing configurations. Always verify your transmission model code before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101164 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301371 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing and cover alignment |
| 4644303060 | COVER PLATE | Seals the transmission housing opening |
| 4644201011 | COVER PLATE | Alternative cover plate for WG200 |
| 4644201010 | COVER PLATE | Standard cover plate for early models |
| 4644301372 | COVER PLATE | Reinforced cover plate for heavy-duty use |
| 0636610028 | STUD | Threaded fastener for component mounting |
| 0634306525 | O-RING | Seals the oil level tube to housing |
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