Overview
The ZF 4661.303.002 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 94 Series transmission family. 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. Positioned at the rear of the transmission housing, the output flange ensures precise alignment and secure coupling under high-load conditions. The SKU 4661.303.002 is manufactured to ZF’s exacting tolerances, guaranteeing a direct bolt-on replacement without modification. For optimal assembly integrity, this flange mates with the 4661101024: TRANSMISSION HOUSING and the 4661301054: HOUSING II, forming a sealed, vibration-resistant unit.
Symptoms of Failure
- Transmission fluid leakage at the rear seal: A worn output flange can damage the lip seal, causing oil to drip from the tail housing. This is often noticed as puddles under the vehicle after parking.
- Driveline vibration during acceleration: Excessive play in the flange splines or a distorted mounting face leads to imbalance, felt as a rhythmic shudder through the chassis at highway speeds.
- Clunking noise when shifting gears: Loose or fatigued flange bolts allow rotational slop, producing a metallic knock during gear engagement or throttle changes.
- Premature bearing wear in the transmission: A failing output flange misaligns the output shaft, accelerating wear on internal bearings and the 0631306174: CYLINDRICAL PIN that indexes the assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4661.303.002 |
| OEM Reference | ZF 4661.303.002 |
| Material | Forged steel, induction-hardened |
| Outer Diameter | 180 mm (approx.) |
| Bolt Circle Diameter | 150 mm (approx.) |
| Spline Count | 24 (internal) |
| Weight | 2.8 kg (6.2 lbs) |
| Surface Finish | Zinc-plated, corrosion-resistant |
Compatibility
This output flange is designed for the WG 94 Series transmission platform, which includes models such as the WG180, WG200, and WG210. It is also compatible with select ZF off-highway and industrial transmissions that share the same spline geometry and bolt pattern. Always verify the spline count and pilot diameter against your existing flange before installation. The 0769123894: TYPE PLATE affixed to the transmission housing provides the exact model identification for cross-referencing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101024 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4661301054 | HOUSING II | Rear housing section supporting output shaft |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing-to-flange positioning |
| 0769123894 | TYPE PLATE | Identification tag with transmission model data |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 4660201008 | SCREW PLUG | Drain or fill port plug |
| 0636100117 | SCREW PLUG | Pressure test port plug |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals secondary oil gallery |
