Overview
The ZF 4644.303.524 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 200 series powershift transmission. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the vehicle’s driveshaft, transferring torque from the gearset to the wheels. Machined from high-strength alloy steel, the flange ensures precise rotational alignment and load distribution under heavy-duty cycles. The SKU 4644.303.524 is factory-tested to ZF’s exacting tolerances, making it a direct replacement for worn or damaged units in construction, agricultural, and material handling equipment.
Symptoms of Failure
- Transmission oil leak at output shaft: A degraded flange seal surface or cracked hub allows hydraulic fluid to escape, leaving puddles under the bell housing.
- Driveline vibration during acceleration: Worn splines or a bent flange face cause rotational imbalance, felt as a shudder through the chassis at low speeds.
- Gear engagement hesitation or slipping: Excessive play between the flange and output shaft disrupts torque flow, leading to delayed clutch pack engagement.
- Metallic debris in transmission fluid: Fretting wear on the flange’s spline teeth sheds fine steel particles, contaminating the hydraulic circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.303.524 |
| OEM Reference | ZF 4644.303.524 |
| Material | Alloy steel, induction-hardened spline |
| Outer Diameter | 180 mm (approx.) |
| Overall Length | 95 mm (approx.) |
| Spline Count | 14-tooth, SAE standard |
| Weight | 3.2 kg (7.1 lbs) |
| Surface Finish | Black oxide corrosion resistant |
Compatibility
This output flange is designed for the ZF WG 200 series transmission family, including the WG180, WG200, and WG210 models. It is commonly found in off-highway vehicles such as telehandlers, wheel loaders, and dump trucks. The 4644.303.524 flange interfaces directly with the 4644101222: TRANSMISSION HOUSING and the 4644301226: TRANSMISSION HOUSING variants. For proper identification, always cross-reference the 0730365067: TYPE PLATE affixed to your transmission. The flange is secured using a 0631311009: GROOVED STUD and nut assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101222 | TRANSMISSION HOUSING | Encloses gearset and supports output shaft |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing casting for WG200 variants |
| 0730365067 | TYPE PLATE | Identification tag with transmission serial number |
| 0631311009 | GROOVED STUD | Fastener for flange-to-housing attachment |
| 4644301298 | COVER PLATE | Seals access port on housing |
| 0634306525 | O-RING | Hydraulic seal between flange and shaft |
| 0636305026 | SCREW PLUG | Closes oil drain or test port |
| 4475280078 | ADAPTER | Couples flange to non-standard driveshafts |
| 4644301279 | SCREEN SHEET | Filter mesh inside oil sump |
| 4644301088 | SEALING CAP | Protects unused housing openings |
