Overview
The ZF 4616.336.044 DRIVER is a critical OEM genuine component engineered for the WG65 series of heavy-duty transmissions. This part functions as the primary actuation interface within the clutch or shift mechanism, converting hydraulic or mechanical input into precise movement to engage gear sets. Positioned directly within the transmission valve body or clutch housing assembly, the 4616.336.044 ensures smooth power transfer and reliable gear selection under high torque loads. For fleet managers and rebuild shops, sourcing the exact SKU 4616.336.044 guarantees factory-specified tolerances and long service life, avoiding the premature wear associated with aftermarket substitutes.
Symptoms of Failure
When the ZF 4616.336.044 DRIVER begins to degrade, operators will notice distinct operational issues. Watch for these specific failure indicators:
- Delayed or harsh gear engagement – A worn driver can cause a noticeable lag when shifting from neutral into drive or reverse, often accompanied by a jarring clunk.
- Intermittent gear slipping under load – If the driver loses its precise stroke length, the transmission may momentarily slip during uphill climbs or heavy hauling, a classic sign of internal wear.
- Hydraulic fluid contamination – A failing driver can generate metallic debris that circulates through the system, often first detected as dark, gritty fluid on the dipstick or during a filter change.
- Erratic shift patterns – The transmission may hunt between gears or fail to hold a selected gear, particularly when the driver’s internal seals or piston surfaces are compromised.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4616.336.044 |
| OEM Reference | ZF 4616.336.044 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 112 mm |
| Outer Diameter | 38 mm |
| Internal Bore Diameter | 16 mm |
| Operating Temperature Range | -40°C to +120°C |
| Seal Type | Integrated PTFE lip seal |
Compatibility
This ZF 4616.336.044 DRIVER is specifically designed for the WG65 series transmission family. Based on its mechanical interface and stroke characteristics, it is also compatible with the following ZF models that share the same driver architecture: WG180, WG200, WG210, and WG250. Always verify the part number against your transmission’s serial plate before installation. The driver mounts directly into the TRANSMISSION HOUSING (4616101065), where it is secured using precision fasteners such as the HEXAGON SCREW (0636011038), HEXAGON SCREW (0636011118), and HEXAGON SCREW (0636016015) to ensure proper alignment and torque retention.
Related Components
The following parts are commonly replaced or inspected alongside the 4616.336.044 during a full WG65 overhaul:
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing that encloses the driver and gear train |
| 0636011038 | HEXAGON SCREW | Fastener for securing driver mounting bracket |
| 0636011118 | HEXAGON SCREW | Fastener for valve body attachment points |
| 0636016015 | HEXAGON SCREW | High-torque fastener for housing assembly |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for precise driver positioning |
| 0634313118 | O-RING | Seals hydraulic passages around the driver bore |
| 0636304019 | SCREW PLUG | Closes test ports and oil galleries in the housing |
| 0634801152 | SEALING RING | Static seal between housing and cover plate |
| 0732611049 | FILTER INSERT | Captures debris from driver wear before it circulates |
| 0634303718 | O-RING | Secondary seal for high-pressure hydraulic circuits |
