Overview
The ZF 4660.203.011 OUTPUT FLANGE is a critical drivetrain component engineered for the WG 92 series transmissions. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the driveshaft, transferring rotational torque from the gearbox to the vehicle’s wheels. Precision-machined from high-strength alloy steel, the flange ensures concentric alignment and vibration-free power delivery. The SKU 4660.203.011 is a direct replacement for worn or damaged flanges, restoring factory-spec performance. It mounts directly onto the output shaft within the TRANSMISSION HOUSING, where it is secured by the CYLINDRICAL PIN for precise rotational indexing.
Symptoms of Failure
- Transmission fluid seepage at the output shaft: A degraded flange seal or worn splines can cause oil to weep past the output bore, leaving puddles under the vehicle.
- Driveline vibration during acceleration: A warped or cracked flange creates imbalance, transmitting harsh shuddering through the chassis at highway speeds.
- Clunking noise when shifting gears: Excessive play between the flange splines and output shaft results in audible metallic knocking during load changes.
- Difficulty engaging or holding gear: Misalignment from a damaged flange can interfere with the HOUSING II assembly, leading to erratic shift behavior.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.203.011 |
| OEM Reference | ZF 4660.203.011 |
| Material | Alloy steel, induction-hardened |
| Outer Diameter | 180 mm (approx.) |
| Bolt Circle Diameter | 150 mm (approx.) |
| Weight | 2.8 kg (6.2 lbs) |
| Spline Count | 24 internal splines |
| Surface Treatment | Zinc-phosphate coating |
Compatibility
This output flange is specifically designed for the ZF WG 92 series transmission family. It is compatible with the following models: WG92, WG180, WG200, and WG250. The part also fits select variants of the ZF 4WG-200 and 5WG-300 series where the output shaft spline geometry matches. Always verify the spline count and bolt pattern against your existing flange before installation. The flange works in conjunction with the TYPE PLATE for proper identification during rebuilds.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101015 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301054 | HOUSING II | Rear section housing output shaft bearings |
| 0631306174 | CYLINDRICAL PIN | Aligns flange to output shaft |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660221029 | SUCTION TUBE | Draws oil from sump to pump |
| 0634100317 | O-RING | Seals flange-to-housing joint |
| 0636103273 | CAP SCREW | Fastens flange to output shaft |
| 0634306311 | O-RING | Seals suction tube connection |
| 4660321029 | FIXING PLATE | Retains flange axial position |
