Overview
The ZF 4657.103.448 OUTPUT for WG191/WG211 is a critical driveline component engineered to transfer torque from the transmission’s planetary gearset to the output shaft. Positioned at the rear of the gearbox housing, this OEM genuine part ensures precise rotational alignment and load distribution under heavy-duty conditions. The SKU 4657.103.448 is machined from high-strength alloy steel to withstand continuous stress in commercial vehicles, construction equipment, and marine applications. When paired with the 4657101049: TRANSMISSION HOUSING, this output component forms the final mechanical interface before the driveshaft, directly influencing vehicle propulsion and operational reliability.
Symptoms of Failure
- Oil seepage at the rear seal area: Worn splines or bearing surfaces on the 4657.103.448 output can cause seal misalignment, leading to transmission fluid leaks that stain parking surfaces and reduce lubrication efficiency.
- Gear slipping under load: Degraded output engagement with the 4657301130: HOUS.FRONT SECT may result in intermittent power loss during acceleration or hill climbs.
- Vibration or driveline shudder: Excessive play in the output hub creates harmonic oscillations that resonate through the chassis, especially at highway speeds.
- Metallic debris in transmission fluid: Flaking or spalling on the output’s contact surfaces contaminates the oil, accelerating wear on the 4657301131: HOUSING REAR PART and internal bearings.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.103.448 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outer Diameter | 142 mm |
| Overall Length | 215 mm |
| Spline Count | 24 (involute, DIN 5480) |
| Weight | 4.8 kg |
| OEM Reference | ZF 4657.103.448 |
| Hardness | 58-62 HRC (case depth 0.8 mm) |
Compatibility
This output is engineered for ZF WG series transmissions, specifically the WG191 and WG211 models. It also fits the WG180 and WG200 variants when used with the correct 0631306816: CYLINDRICAL PIN for alignment. The 4657.103.448 is not interchangeable with earlier WG150 or WG160 outputs due to differing spline profiles. Always verify your transmission’s serial number against ZF’s compatibility chart before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Encloses gearset and supports output assembly |
| 4657301130 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4657301131 | HOUSING REAR PART | Rear section housing for output bearing and seal |
| 0631306816 | CYLINDRICAL PIN | Precision alignment dowel for housing halves |
| 0636102489 | CAP SCREW | M12 fastener for output flange retention |
| 4656301148 | FIXING PLATE | Locking plate for output nut |
| 0636102463 | CAP SCREW | M10 bolt for housing attachment |
| 4657201133 | SCREEN SHEET | Magnetic debris screen for oil sump |
| 0636115287 | CAP SCREW | M8 bolt for cover plate |
| 4657301065 | PLATE | Thrust washer for output shaft axial play |
Frequently Asked Questions
Q: Can the ZF 4657.103.448 output be used in a WG211 with a PTO?
A: Yes, this output is compatible with side-mounted PTO units on the WG211, provided the PTO gear meshes correctly with the output’s external spline. Always check the PTO manufacturer’s depth specifications to avoid interference with the HOUSING REAR PART.
Q: What torque specification is required for the output nut?
A: The retaining nut should be tightened to 450 Nm ± 20 Nm using a torque wrench, then secured with a new FIXING PLATE. Reusing the old plate risks loosening under vibration.
Q: How do I identify a counterfeit 4657.103.448 output?
A: Genuine ZF parts have a laser-etched part number and a matte black oxide finish. Counterfeits often show rough machining marks on the spline flanks and lack the ZF logo on the flange face.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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