Overview
The ZF 4657.309.002 OUTPUT FLANGE is a critical driveline component engineered for the WG190 and WG210 series transmissions. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the propeller shaft or drive axle, transferring rotational torque from the gearset to the vehicle’s driveline. Machined from high-strength forged steel, the output flange (SKU: 4657.309.002) is precisely splined to mate with the output shaft and features a sealed bore to prevent contamination. It is housed within the rear section of the transmission assembly, directly adjacent to the HOUSING REAR PART, and is secured using a CYLINDRICAL PIN for rotational alignment.
Symptoms of Failure
- Transmission fluid seepage at the rear seal: A worn output flange often damages the lip seal, leading to visible oil drips beneath the vehicle or equipment, especially after prolonged operation.
- Vibration or driveline shudder during acceleration: Spline wear on the flange can cause play between the output shaft and flange, resulting in low-frequency vibrations that worsen under load.
- Clunking noise when shifting between drive and reverse: Excessive backlash from a loose or worn flange creates a metallic “clunk” as torque is applied, indicating imminent failure.
- Premature bearing or housing damage: A failing flange can transmit abnormal forces into the TRANSMISSION HOUSING, accelerating wear on internal components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.309.002 |
| Material | Forged steel (C45 or equivalent) |
| Outer Diameter | ~180 mm |
| Overall Length | ~95 mm |
| Spline Count | 24 (internal) |
| Weight | ~3.2 kg |
| OEM Reference | ZF 4657.309.002 |
| Seal Surface Hardness | HRC 50-55 |
Compatibility
This output flange is designed for the ZF WG190 and WG210 series transmissions. Based on its spline geometry and bolt pattern, it is also compatible with the WG180 and WG200 models when used with the correct CAP SCREW and FIXING PLATE. It is not interchangeable with earlier WG150 series flanges due to differing spline counts. Always verify the HOUS.FRONT SECT compatibility when retrofitting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing enclosing gears and shafts |
| 4657201027 | HOUS.FRONT SECT | Forward housing section supporting input shaft |
| 4657201020 | HOUSING REAR PART | Rear housing section containing output flange |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for flange-to-shaft positioning |
| 0636100801 | CAP SCREW | Fastener securing flange to output shaft |
| 4656301148 | FIXING PLATE | Locking plate preventing fastener loosening |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Mounting bolt for housing sections |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply conduit |
Frequently Asked Questions
Q: Can I reuse the old output flange seal when installing part 4657.309.002?
A: No. Always replace the rear oil seal simultaneously, as the old seal will have worn to match the previous flange surface, risking immediate leakage.
Q: How do I know if my WG210 needs a new output flange?
A: Measure rotational play at the flange face. If you detect more than 0.5 mm of radial movement when rocking the flange by hand, replacement is necessary to avoid driveline damage.
Q: Is the 4657.309.002 flange compatible with aftermarket driveshaft yokes?
A: Yes, but only if the yoke matches the 24-spline internal profile and uses the correct bolt circle diameter. We recommend using OEM ZF yokes for guaranteed fitment.
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Phone: +86 158 2286 3467 |
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