Overview
The ZF 4644.164.024 SHIFT SYSTEM is a precision-engineered OEM genuine component designed specifically for the WG 65 Series transmission. This critical assembly governs gear selection and hydraulic flow within the transmission housing, ensuring smooth and reliable shifting under heavy-duty industrial loads. As a direct replacement for the original factory part, the SKU 4644.164.024 integrates seamlessly with the valve body and solenoid controls. When installed alongside a 4616105416 VALVE and a 0501319251 SOLENOID VALVE, this shift system restores precise hydraulic actuation and eliminates erratic gear engagement.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn shift system components cause hesitation when shifting from neutral to drive or reverse, often accompanied by a jarring clunk.
- Intermittent gear slipping under load: As the shift system loses hydraulic integrity, the transmission may slip out of gear during acceleration or while climbing gradients.
- Hydraulic fluid contamination: Degraded seals within the shift system allow metallic debris to circulate, leading to clogged passages and erratic shift patterns.
- No shift response in cold conditions: A failing shift system may fail to actuate when transmission fluid is cold, requiring multiple attempts to engage a gear.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.164.024 |
| OEM Reference | ZF 4644.164.024 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 1.85 kg (approx.) |
| Dimensions (L x W x H) | 210 mm x 85 mm x 45 mm |
| Sealing Surface | Precision-ground with O-ring groove |
| Operating Pressure | 12–18 bar |
| Temperature Range | -20°C to +120°C |
Compatibility
This shift system is engineered for the ZF WG 65 Series transmission family. Based on its design and hydraulic interface, it is also compatible with the following ZF models: WG180, WG200, WG250, and WG300. Always verify the part number against your transmission’s serial plate before installation. For complete assembly, pair this unit with a 0636302013 SCREW PLUG and a 0634801038 SEALING RING to prevent fluid leaks at the mounting points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105416 | VALVE | Controls hydraulic flow to shift actuators |
| 0501319251 | SOLENOID VALVE | Electrically actuates shift system pressure |
| 0636302013 | SCREW PLUG | Seals hydraulic ports in the shift system |
| 0634801038 | SEALING RING | Prevents fluid leakage at threaded connections |
| 4616305078 | CONSOLE | Mounting bracket for shift system assembly |
| 0636010047 | HEXAGON SCREW | Secures shift system to transmission housing |
| 0636101020 | CAP SCREW | Fastens valve cover plate |
| 0630001010 | WASHER | Distributes load under fasteners |
| 0637006015 | HEXAGON NUT | Locks shift system components in place |
| 0637842523 | SCREW-IN SLEEVE | Provides threaded insert for hydraulic ports |
ZF 4644.164.024 SHIFT SYSTEM – Shift System RFQ Support
ZF 4644.164.024 SHIFT SYSTEM can be reviewed as a shift-system sourcing item for WG, BP, HL, or ERGOPOWER-related service work when the application evidence is available.
Part-Number Summary
Use ZF number 4644.164.024 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: SHIFT SYSTEM
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4644.164.024 |
|---|---|
| Normalized SKU | 4644164024 |
| Part name | SHIFT SYSTEM |
| Product category | shift system |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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