Overview
The ZF 4646.103.037 OUTPUT – WG 250/WG 260/WG 310 Series | OEM Sub-Assembly is a precision-engineered output sub-assembly designed for integration into ZF’s heavy-duty WG series powershift transmissions. This component serves as the critical interface between the transmission’s final drive and the driveline, ensuring torque is transferred efficiently and reliably under high-load conditions. The SKU 4646.103.037 is specifically machined to OEM tolerances, providing a direct replacement for worn or damaged output units in WG 250, WG 260, and WG 310 series gearboxes. When installed, it works in concert with the TRANSMISSION HOUSING (4646101156) to maintain structural integrity and alignment within the drivetrain assembly.
Symptoms of Failure
When the ZF 4646.103.037 output sub-assembly begins to degrade, operators may notice several distinct failure indicators. Common long-tail search queries include:
- Oil seepage from the output flange area – Worn seals within the sub-assembly allow transmission fluid to escape, leading to low lubricant levels and potential overheating.
- Vibration or shudder during gear engagement – Bearing wear inside the output unit causes driveline imbalance, especially under load or during shifts.
- Erratic speed sensor readings – A failing output sub-assembly can disrupt the tone ring or sensor interface, triggering false diagnostic codes.
- Metallic debris in transmission fluid – Internal spalling or pitting of the output shaft generates fine metal particles, contaminating the hydraulic system.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4646.103.037 |
| Material | High-strength alloy steel (induction-hardened) |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Output Flange Diameter | 120 mm |
| Spline Count | 24 (SAE standard) |
| OEM Reference | ZF 4646.103.037 |
| Torque Capacity | Up to 3,200 Nm |
Compatibility
This OEM sub-assembly is engineered for direct fitment into the following ZF transmission models: WG 180, WG 200, WG 250, WG 258, WG 260, WG 308, WG 310, and WG 311 series. It is a common service part for both on-highway and off-highway applications, including construction loaders, agricultural tractors, and industrial material handlers. For proper installation, ensure the HOUSING (4646301327) is free of cracks and that all HEXAGON SCREW (0636015304) and CAP SCREW (0636101828) fasteners are torqued to factory specifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101156 | TRANSMISSION HOUSING | Encloses and supports gear train and output assembly |
| 4646301327 | HOUSING | Secondary housing for clutch pack and valve body |
| 0636015304 | HEXAGON SCREW | Secures output flange to transmission housing |
| 0636101828 | CAP SCREW | Fastens cover plate to output sub-assembly |
| 4646301102 | COVER SHEET | Protects internal components from debris ingress |
| 4646301285 | COVER SHEET | Secondary sealing cover for output area |
| 0730365190 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment stud for housing positioning |
| 0636101193 | CAP SCREW | Fastener for cover sheet attachment |
| 0636010179 | HEXAGON SCREW | Mounting screw for transmission to bell housing |
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