Overview
The ZF 4642.311.103 DRIVER is a critical rotational component engineered specifically for the WG150 series transmission. This OEM genuine part transmits torque from the input shaft to the clutch pack assembly, ensuring precise engagement and disengagement during gear shifts. Positioned within the main drive housing, the 4642.311.103 DRIVER interfaces directly with the planetary gear set to maintain consistent power flow. When paired with a robust TRANSMISSION HOUSING (4642101109), this part ensures minimal backlash and extended service life under heavy-duty industrial loads.
Symptoms of Failure
- Delayed gear engagement or slipping: A worn 4642.311.103 DRIVER often causes hesitation when shifting into forward or reverse, especially under load. This “ZF WG150 slipping under acceleration” symptom indicates the driver can no longer maintain proper clutch pressure.
- Metallic grinding noises from the bell housing: As the driver surface wears, you may hear a distinct “grinding sound from ZF transmission when shifting” due to metal-on-metal contact with the clutch hub.
- Transmission fluid contamination with metallic debris: Excessive wear on the 4642.311.103 generates fine metal particles in the oil, detectable during routine fluid changes. This “ZF transmission oil has metal shavings” issue often requires immediate inspection of the TRANSMISSION HOUSING (4642301205) for scoring.
- Intermittent loss of drive in higher gears: A failing driver may cause sudden power loss in 3rd or 4th gear, a symptom commonly searched as “ZF WG150 drops out of gear while driving.”
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.311.103 |
| OEM Reference | ZF 4642.311.103 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 112 mm |
| Inner Spline Diameter | 38 mm |
| Overall Length | 68 mm |
| Surface Hardness | 58-62 HRC |
| Compatible Fasteners | HEXAGON SCREW (0636100621) |
Compatibility
This 4642.311.103 DRIVER is primarily designed for the ZF WG150 series, but it also fits select models in the WG180 and WG200 families due to shared clutch hub dimensions. It is directly compatible with transmissions built between 2005-2020 that use a 38mm input spline. Always verify your transmission serial number against the TYPE PLATE (0730365125) before ordering. For secure mounting, ensure the GROOVED STUD (0631311009) is torqued to factory specifications during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports the driver assembly |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing for WG150 variants |
| 0730365125 | TYPE PLATE | Identification plate for transmission specs |
| 0631311009 | GROOVED STUD | Secures the driver to the shaft |
| 4642301168 | SCREEN SHEET | Oil filter screen for the sump |
| 4642301169 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Fastener for housing covers |
| 4642301186 | SCREEN SHEET | High-flow filter for heavy-duty use |
| 4644106085 | SHIFT SYSTEM | Controls gear selection mechanism |
| 4642306050 | COVER PLATE | Seals the driver access port |
