Overview
The ZF 4644.103.071 OUTPUT for WG200 is a critical driveline component engineered for the WG 200 Series transmission. This OEM genuine part serves as the primary interface between the transmission’s planetary gearset and the vehicle’s driveshaft, transferring torque from the output shaft to the propeller shaft. Positioned at the rear of the transmission housing, the output assembly ensures precise rotational alignment and load distribution during heavy-duty operations. The SKU 4644.103.071 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in demanding industrial applications such as forklifts, airport ground support equipment, and construction machinery.
Symptoms of Failure
When the ZF 4644.103.071 OUTPUT begins to wear, operators may notice several distinct failure indicators. Oil leaks around the rear seal area are a common early sign, often caused by a worn output bushing or damaged sealing surface. Gear slipping under load can occur when the output splines strip or become misaligned, leading to intermittent power loss during acceleration. Unusual vibration or driveline shudder at low speeds typically indicates bearing degradation within the output assembly. Finally, metal debris in the transmission fluid suggests advanced wear of the output gear teeth or thrust washer, requiring immediate replacement to prevent catastrophic failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4644.103.071 |
| OEM Reference | ZF 4644.103.071 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Weight | 2.85 kg (6.28 lbs) |
| Overall Length | 145 mm |
| Output Spline Diameter | 38 mm (1.496 in) |
| Number of Spline Teeth | 24 |
| Seal Surface Hardness | HRC 58-62 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This ZF 4644.103.071 OUTPUT is specifically designed for the WG 200 Series transmissions, including models such as the WG180, WG200, and WG211. It is also compatible with select WG 160 variants that share the same output shaft geometry. The part integrates directly with the 4644105475: DISCONNECTION mechanism, which allows for rapid driveline separation during maintenance. For proper torque transfer, it must be paired with the 4642303097: OUTPUT FLANGE, secured using the 0636020211: HEXAGON SCREW. The entire assembly mounts within the 4644101134: TRANSMISSION HOUSING, which provides structural support and fluid containment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105475 | DISCONNECTION | Enables quick driveline separation for service |
| 4642303097 | OUTPUT FLANGE | Connects output shaft to driveshaft yoke |
| 0636020211 | HEXAGON SCREW | Secures flange to output shaft |
| 4644101134 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301349 | HOUSING | Rear cover for output bearing support |
| 0730365125 | TYPE PLATE | Identification label with serial number |
| 0631311009 | GROOVED STUD | Alignment pin for housing assembly |
| 0636305019 | SCREW PLUG | Seals oil drain or fill port |
| 4644301247 | THREADED BUSH | Reinforced insert for bolt attachment |
| 0634303485 | O-RING | Static seal between mating surfaces |
