Overview
The ZF 4646.103.456 OUTPUT assembly is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This critical component serves as the primary power take-off point, transferring rotational force from the transmission’s final drive to the vehicle’s driveline. As a factory-spec replacement, the SKU 4646.103.456 ensures exact fitment and load-bearing performance, directly interfacing with the TRANSMISSION HOUSING (4646101156) to maintain proper gear alignment and torque distribution. When installed alongside the HOUSING (4646301327), this output assembly forms a sealed unit that withstands high cyclic stresses in heavy-duty industrial applications.
Symptoms of Failure
- Oil seepage at the output flange: A worn 4646.103.456 output seal often causes visible fluid trails around the flange, leading to low transmission fluid levels and eventual overheating.
- Vibration during gear engagement: Degraded bearings within the output sub-assembly produce a distinct shudder or humming noise when shifting between forward and reverse, particularly under load.
- Intermittent driveline slip: If the output shaft splines wear, operators may experience sudden loss of power transfer, especially during uphill climbs or heavy hauling.
- Metallic debris in the oil pan: Flaking from a failing output component contaminates the transmission fluid, often visible as silver or bronze particles during routine maintenance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.103.456 |
| Material | Forged alloy steel (case-hardened) |
| Weight | 4.2 kg (9.3 lbs) |
| Output Flange Diameter | 120 mm |
| Spline Count | 28 (internal) |
| OEM Reference | ZF 4646.103.456 |
| Torque Capacity | 1,200 Nm (peak) |
Compatibility
This output sub-assembly is engineered for direct replacement in the following ZF transmission families: WG 180, WG 200, WG 250, WG 260, WG 308, WG 310, and WG 311 series. It is specifically validated for the WG 258, WG 260, WG 308, WG 310, and WG 311 categories. For proper installation, always pair the 4646.103.456 with the correct HEXAGON SCREW (0636015304) and CAP SCREW (0636101828) to secure the assembly to the transmission housing. Verify your transmission model’s serial number before ordering to ensure compatibility with the output spline configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101156 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 4646301327 | HOUSING | Secondary casing for output shaft support |
| 0636015304 | HEXAGON SCREW | Fastens output assembly to housing |
| 0636101828 | CAP SCREW | Secures bearing retainer plate |
| 4646301102 | COVER SHEET | Protects internal components from debris |
| 4646301285 | COVER SHEET | Secondary sealing cover for output area |
| 0730365190 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for housing assembly |
| 0636101193 | CAP SCREW | Mounting bolt for output flange |
| 0636010179 | HEXAGON SCREW | Fastener for cover sheet attachment |
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