Overview
The ZF 4657.103.016 OUTPUT for WG191 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gearset to the output shaft. Positioned at the rear of the main housing, this OEM genuine part ensures precise torque delivery and smooth power flow in heavy-duty ZF WG191 and WG211 series transmissions. The SKU 4657.103.016 is manufactured to ZF’s original tolerances, guaranteeing a direct fit and long service life. When installed alongside a properly functioning 4657120005: PRESSURE REGULATOR, the output assembly maintains consistent hydraulic pressure for reliable shifting under load.
Symptoms of Failure
- Oil leaks around the rear output seal: A worn 4657.103.016 output can cause transmission fluid to seep past the sealing surface, leaving puddles under the vehicle and leading to low fluid levels.
- Gear slipping under acceleration: When the output hub loses its spline engagement, you may experience intermittent power loss or a “slipping” sensation during gear changes, especially in WG191 models.
- Abnormal vibration or driveline shudder: A damaged output component can create imbalance, resulting in noticeable shaking at highway speeds or during torque converter lockup.
- Whining or grinding noise from the transmission tail: Worn bearings or scoring on the output surface produce metallic sounds that intensify with RPM changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.103.016 |
| OEM Reference | ZF 4657.103.016 |
| Material | Case-hardened steel (alloy) |
| Weight | ~2.4 kg (5.3 lbs) |
| Outer Diameter | 85 mm |
| Overall Length | 142 mm |
| Spline Count | 24 internal / 30 external |
| Surface Treatment | Black oxide / phosphate |
Compatibility
This OEM genuine output is designed primarily for the ZF WG191 and ZF WG211 series transmissions. It also fits select variants of the WG180 and WG200 series where the output shaft interface matches the 24/30 spline configuration. Always verify your transmission model tag before ordering. For complete assembly, pair this output with a 0501211384: VALVE to control clutch feed, and use a 0630532183: INDENTED RING to secure the output in the housing. The 4656306145: PISTON is also commonly replaced during output overhauls to restore clutch pack clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Maintains hydraulic pressure for clutch engagement |
| 0501211384 | VALVE | Directs oil flow to clutch packs |
| 0630532183 | INDENTED RING | Locks output shaft into housing |
| 4656306145 | PISTON | Applies clutch pack force |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Secures valve body components |
| 0631610026 | SET SCREW | Adjusts pressure regulator setting |
| 4657101049 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section of transmission case |
| 4657301131 | HOUSING REAR PART | Rear section enclosing output assembly |
Frequently Asked Questions
Q: Can the ZF 4657.103.016 output be used in a WG200 transmission?
A: Yes, it is compatible with WG200 models that share the same 24/30 spline configuration. Always cross-reference your transmission’s serial number with ZF’s parts catalog to confirm fitment.
Q: What other parts should I replace when installing a new output?
A: It is highly recommended to replace the 0630532183: INDENTED RING and the output shaft seal simultaneously. Inspect the 4656306145: PISTON for wear, as a damaged piston can cause premature output failure.
Q: How do I identify a genuine OEM 4657.103.016 part?
A: Genuine ZF parts have laser-etched part numbers and a matte black oxide finish. Counterfeit parts often have rough machining marks and incorrect spline dimensions.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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