Overview
The ZF 4657.103.422 OUTPUT for WG210 is a precision-machined output shaft assembly engineered for the rear power take-off (PTO) region of ZF’s WG series transmissions. This OEM genuine part, identified by SKU 4657.103.422, transfers rotational torque from the planetary gear set to the driveline flange, ensuring smooth power delivery in heavy-duty commercial vehicles. It sits directly behind the HOUS.FRONT SECT and interfaces with the HOUSING REAR PART to seal the output cavity. Designed for the WG 210 Series, this component is critical for maintaining gear alignment and preventing axial play under high-load conditions.
Symptoms of Failure
- Oil seepage at the output flange – Worn seals on the 4657.103.422 allow transmission fluid to leak past the output shaft, leaving puddles under the vehicle after parking.
- Driveline vibration during acceleration – A fatigued output shaft causes rotational imbalance, producing a low-frequency shudder that worsens as engine RPM increases.
- Intermittent gear slipping in higher ranges – When the output splines wear, the connection to the mating flange loses grip, resulting in momentary power loss under load.
- Metallic grinding noise from the rear housing – Debris from a failing output bearing contaminates the TRANSMISSION HOUSING, causing audible wear on internal gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.103.422 |
| Overall Length | 312 mm |
| Output Flange Diameter | 168 mm |
| Spline Count | 24 (involute) |
| Material | Case-hardened 20MnCr5 steel |
| Weight | 4.85 kg |
| OEM Reference | ZF 4657.103.422 |
| Torque Capacity | 2,100 Nm |
Compatibility
This output shaft is engineered for the ZF WG 210 Series, but it also fits select models in the WG180 and WG200 families due to shared rear housing geometry. It is a direct replacement for units equipped with the CYLINDRICAL PIN alignment system. Always verify the transmission serial number before installation; the 4657.103.422 is not compatible with pre-2005 WG150 or WG160 variants without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Encloses the gear train and supports the output shaft bearing |
| 4657201027 | HOUS.FRONT SECT | Front section that aligns the input shaft and pump drive |
| 4657201020 | HOUSING REAR PART | Rear casing that seals the output cavity and mounts the PTO |
| 0631306792 | CYLINDRICAL PIN | Locating pin for precise housing-to-shaft alignment |
| 0636100801 | CAP SCREW | M12 fastener securing the output flange to the shaft |
| 4656301148 | FIXING PLATE | Locking plate that prevents output shaft rotation during service |
| 4657301032 | SCREEN SHEET | Fine mesh filter for the output bearing oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for the rear lubrication gallery |
| 0636100803 | CAP SCREW | M10 bolt for the housing cover retention |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil delivery tube to the output shaft bearing |
Frequently Asked Questions
Q: Can the 4657.103.422 output shaft be rebuilt with new bearings?
A: Yes, the shaft itself is reusable if the splines are not worn beyond 0.2 mm. However, ZF recommends replacing the CYLINDRICAL PIN and all seals during a rebuild to prevent premature failure.
Q: How do I confirm this part fits my WG210 transmission?
A: Check the transmission data plate for the serial number prefix “WG210.” The 4657.103.422 is also backward-compatible with WG200 units that use a 24-spline output flange. If your unit has a 20-spline flange, you will need the HOUSING REAR PART adapter kit.
Q: What torque specification is required for the output flange cap screws?
A: Use 85 Nm for the CAP SCREW (M12) and 45 Nm for the CAP SCREW (M10). Always apply thread-locking compound to prevent loosening under vibration.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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