Overview
This genuine OEM ZF 4681.303.007 output shaft is a critical rotating component engineered for the WG100, WG130, and WG131 transmission series. Positioned at the rear of the gearbox, it transfers torque from the planetary gear set directly to the driveline flange. As a high-stress part, it must withstand continuous torsional loads and axial thrust. The SKU 4681.303.007 is manufactured to original ZF specifications, ensuring precise spline engagement and minimal runout. Replacing a worn or damaged output shaft with this OEM part restores drivetrain integrity and prevents secondary damage to bearings and seals.
Symptoms of Failure
When the ZF 4681.303.007 output shaft begins to fail, operators will notice distinct operational issues. Recognizing these symptoms early can prevent costly transmission overhauls.
- Oil seepage at the rear seal area: A worn shaft surface or damaged splines can compromise the output seal, leading to visible transmission fluid leaks near the driveline connection.
- Driveline vibration under load: Excessive wear or a bent shaft causes noticeable shuddering or vibration, particularly during acceleration or when climbing grades.
- Gear engagement hesitation or slipping: If the output shaft splines are stripped or fatigued, the connection to the planetary carrier becomes loose, resulting in intermittent power loss or delayed engagement.
- Metallic debris in transmission fluid: Spalling or fretting on the shaft surface generates fine metal particles, which can be detected during routine oil changes or filter inspections.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4681.303.007 |
| Overall Length | 385 mm (approx.) |
| Major Diameter | 55 mm (approx.) |
| Spline Count (Output) | 24-tooth involute spline |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (9.3 lbs) |
| OEM Reference | ZF 4681.303.007 |
Compatibility
This genuine output shaft is specifically designed for the following ZF transmission families. Always verify your transmission model and serial number before ordering.
- WG100 Series: WG100, WG101, WG102
- WG130 Series: WG130, WG131, WG132
- BP 210 Series: BP 210, BP 211 (shared shaft architecture)
- BP 230 Series: BP 230, BP 231 (rear output configuration)
For applications in WG180, WG200, or WG250 transmissions, please consult your parts catalog or contact a ZF specialist, as these models may require a different output shaft length or spline profile.
