Overview
The ZF 4642.311.101 DRIVER is a critical internal component engineered specifically for the WG150 series transmission. This OEM genuine part functions as the primary torque-transfer interface within the clutch pack assembly, converting hydraulic pressure into mechanical engagement for precise gear selection. The DRIVER (SKU: 4642.311.101) sits directly on the main shaft, interfacing with the friction discs and steel plates to ensure smooth power delivery. When installed correctly, this part maintains the exact axial clearance required for optimal shift quality in heavy-duty commercial vehicles.
Symptoms of Failure
When the ZF 4642.311.101 DRIVER begins to wear, operators typically notice delayed gear engagement during cold starts, a common long-tail search query for WG150 issues. Another frequent symptom is intermittent clutch slip under load, particularly when ascending grades or carrying maximum payload. You may also observe metallic debris in the transmission oil filter, indicating surface degradation of the driver splines. Finally, erratic shift timing—where the transmission hunts between gears—often points to this part losing its dimensional integrity.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.311.101 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Outer Diameter | 185 mm ±0.05 mm |
| Inner Diameter | 62 mm |
| Thickness | 28.5 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4642.311.101 |
| Spline Count | 24 internal splines |
Compatibility
While the 4642.311.101 DRIVER is primarily designed for the ZF WG150 transmission, it also fits select variants of the WG180 and WG200 series produced between 2008 and 2018. This part is not compatible with the older WG120 or newer WG250 models without adapter modifications. Always verify the transmission serial number against the OEM parts catalog before ordering. The DRIVER works in conjunction with the TRANSMISSION HOUSING (4642101047) and the TRANSMISSION HOUSING (4642301207) to maintain proper alignment. Additionally, the TYPE PLATE (0730365067) and GROOVED STUD (0631311009) are often replaced simultaneously during a full rebuild.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301207 | TRANSMISSION HOUSING | Secondary housing for clutch assembly |
| 0730365067 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for housing mating |
| 4642301168 | SCREEN SHEET | Oil filter mesh for debris protection |
| 4642301169 | SCREEN SHEET | Fine-mesh oil strainer |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover |
| 4642301186 | SCREEN SHEET | Secondary oil filtration screen |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body assembly |
| 4644306500 | COVER PLATE | Sealing plate for shift mechanism |
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