Overview
The ZF 4646.102.060 INPUT 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 torque input interface, connecting the engine output directly to the transmission’s planetary gear set. As a factory-spec sub-assembly, the SKU 4646.102.060 ensures exact fitment and load-bearing capacity, reducing the risk of premature wear in high-torque applications. It is typically mounted directly against the TRANSMISSION HOUSING and secured using the 螺栓 (bolt) kit to maintain structural integrity under heavy loads.
Symptoms of Failure
- Torque converter shudder or vibration: A worn input assembly often causes noticeable shudder during acceleration, especially under load, as the splines lose their tight fit.
- Transmission fluid leaks at the bell housing: Degraded sealing surfaces on the input sub-assembly can lead to persistent oil seepage, often mistaken for a rear main seal failure.
- Delayed or harsh engagement: When the input shaft or bearing surface wears, drivers may experience a pronounced lag or clunk when shifting from Park to Drive or Reverse.
- Metallic debris in the transmission pan: Flaking or spalling from the input sub-assembly introduces ferrous particles into the fluid, which can clog the valve body and damage the VALVE BLOCK.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4646.102.060 |
| OEM Reference | ZF 4646.102.060 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | Approx. 4.2 kg (9.3 lbs) |
| Input Spline Count | 24 (fine spline) |
| Max Torque Capacity | 1,200 Nm |
| Seal Diameter | 85 mm |
Compatibility
This input sub-assembly is engineered for the ZF WG series powershift transmissions. It is a direct fit for the WG 250, WG 260, and WG 310 series. It also shares dimensional compatibility with the WG 180 and WG 200 series when used with the correct HOUSING adapter. For proper installation, always pair this input with the specified CAP SCREW torque values to prevent fastener fatigue. The assembly interfaces directly with the CONNECTING HOUSING to ensure concentric alignment of the driveline.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101189 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4646301317 | HOUSING | Intermediate housing for input shaft support |
| 0636115293 | 螺栓 | High-tensile bolt for housing fastening |
| 0636101153 | CAP SCREW | Hex cap screw for input assembly retention |
| 0736300232 | 螺栓 | Flanged bolt for valve block mounting |
| 4475280208 | SCREW PLUG | Sealing plug for pressure test ports |
| 0634316523 | O-RING | Hydraulic seal for input housing joint |
| 4656306171 | VALVE BLOCK | Hydraulic control manifold for shift logic |
| 4656306190 | CONNECTING HOUSING | Adapter housing between transmission and torque converter |
| 0501213997 | PRESSURE REGULATOR | Maintains hydraulic pressure for clutch engagement |
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