Overview
The ZF 4644.231.156 OIL LEVEL TUBE is a precision-engineered component designed specifically for the WG200 series transmission. This OEM genuine part provides a critical fluid-level monitoring pathway within the transmission sump, ensuring accurate oil measurement during service intervals. The tube sits vertically in the transmission housing, connecting the dipstick port to the oil pan. Manufactured to ZF’s exacting standards, the SKU 4644.231.156 guarantees a leak-free seal and consistent fluid delivery to the lubrication system. For optimal assembly integrity, this tube is often installed alongside the 4644101165 TRANSMISSION HOUSING and the 4644301304 HOUSING, which provide the structural foundation for the entire gearbox.
Symptoms of Failure
- Transmission fluid puddles under the vehicle: A cracked or corroded oil level tube allows ATF to escape, leading to low fluid levels and potential gearbox damage.
- Erratic gear engagement or slipping: When the tube fails, incorrect oil levels cause hydraulic pressure fluctuations, resulting in delayed or harsh shifts.
- Dipstick reading inconsistencies: A blocked or deformed tube prevents accurate oil measurement, making routine checks unreliable.
- Burning smell from overheated transmission: Insufficient lubrication due to a leaking tube raises operating temperatures, accelerating wear on internal components like the 0631311009 GROOVED STUD.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.231.156 |
| Material | Steel with corrosion-resistant coating |
| Length | Approx. 320 mm |
| Outer Diameter | 12 mm |
| Weight | 0.15 kg |
| OEM Reference | ZF 4644.231.156 |
| Seal Type | O-ring (included) |
Compatibility
This oil level tube is engineered for the ZF WG200 series transmissions, commonly found in medium-duty commercial vehicles and industrial equipment. It is also compatible with the WG180 and WG210 models, which share the same sump architecture. Always verify fitment with your transmission’s serial number. For complete assembly, pair this tube with the 0730365067 TYPE PLATE for accurate identification and the 4644306408 WASHER for secure mounting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101165 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301304 | HOUSING | Secondary housing for valve body |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastening stud for housing alignment |
| 4644106300 | SHIFT SYSTEM | Gear selection mechanism |
| 4644306500 | COVER PLATE | Protective cover for shift system |
| 4644159300 | SHIFT SYSTEM | Alternate shift mechanism variant |
| 4644306560 | VALVE BLOCK | Hydraulic control valve assembly |
| 4644306408 | WASHER | Sealing washer for fluid ports |
| 4644107015 | SPEEDOMETER | Output speed sensor drive |
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