Overview
The ZF 4661.131.013 OIL DIPSTICK is a precision-engineered fluid level indicator designed specifically for the WG 94 series transmission. This OEM genuine part, identified by SKU 4661.131.013, sits directly in the transmission housing, providing operators with an accurate visual reference for checking oil levels. Maintaining correct fluid levels is critical for lubrication, cooling, and hydraulic pressure within the gearbox. When paired with a properly functioning 4661103010 OUTPUT assembly, this dipstick ensures that the transmission operates within its optimal thermal and mechanical parameters.
Symptoms of Failure
- Oil leaks around the dipstick tube: A worn or cracked dipstick seal can cause transmission fluid to seep out, leading to low oil levels and potential overheating.
- Inaccurate fluid readings: If the dipstick becomes bent, corroded, or has a broken handle, you may get false high or low readings, risking gear slipping due to underfilling.
- Contaminated fluid ingress: A damaged dipstick cap or O-ring allows dirt and moisture into the transmission, accelerating wear on internal components like the 4661201204 TAPER ROLLER BEARING.
- Hard shifting or delayed engagement: Persistent low fluid levels from a failing dipstick can cause erratic shift patterns, especially in heavy-duty applications.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4661.131.013 |
| Material | Chrome-plated steel with plastic handle |
| Overall Length | Approx. 320 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4661.131.013 |
| Seal Type | Integrated O-ring (compatible with 0634306328) |
Compatibility
This dipstick is engineered for the ZF WG 94 series, which includes models such as WG94, WG120, WG150, WG180, and WG200. It is also suitable for certain variants of the WG 90 and WG 100 series where the dipstick tube mounting flange matches. For transmissions requiring a replacement 4661303004 OUTPUT SHAFT, verify that the dipstick bore alignment remains consistent. Always cross-reference your transmission serial number with the ZF parts catalog to ensure fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661103010 | OUTPUT | Transfers torque from transmission to driveline |
| 4661303004 | OUTPUT SHAFT | Rotates to deliver power to output flange |
| 4661201204 | TAPER ROLLER BEARING | Supports radial and axial loads on shaft |
| 4661201206 | TAPERED ROLLER BEARING | Provides smooth rotation under heavy loads |
| 4661372031 | SCREEN SHEET | Filters debris from transmission fluid |
| 4661103800 | OUTPUT | Alternate output component for specific models |
| 4642303059 | INPUT FLANGE | Connects transmission to engine flywheel |
| 0750111307 | SHAFT SEAL | Prevents fluid leaks at shaft exit points |
| 0634306328 | O-RING | Seals dipstick tube to transmission housing |
| 4660303022 | WASHER | Distributes load under fasteners |
