Overview
The ZF 4644.106.210 SHIFT SYSTEM is a precision-engineered OEM genuine component designed for the WG 180 Series transmission. This assembly governs the engagement and disengagement of gear sets, ensuring smooth power flow and reliable shifting under heavy-duty conditions. As the mechanical interface between the driver’s command and the transmission’s internal clutches, the shift system directly impacts vehicle drivability and operational efficiency. The SKU 4644.106.210 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in commercial and off-highway applications. When paired with a robust 4644105413: DISCONNECTION assembly, this shift system ensures consistent torque transfer and minimal driveline stress.
Symptoms of Failure
- Hard or erratic gear engagement: A failing shift system often causes delayed or jarring shifts, especially when the transmission is cold. This symptom is frequently searched as “ZF WG180 hard shifting causes.”
- Oil leaks near the shift housing: Worn seals or a cracked shift mechanism can allow transmission fluid to escape. Operators searching for “WG180 transmission oil leak from shift cover” will find this part relevant.
- Gear slipping under load: When the shift system fails to fully engage a clutch pack, the transmission may slip during acceleration. This is a common long-tail query: “ZF WG180 gear slipping under heavy load.”
- Unusual noise during shifting: Grinding or clunking sounds indicate worn shift forks or detent components, often leading to searches like “noisy ZF WG180 shift system replacement.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.106.210 |
| OEM Reference | ZF 4644.106.210 |
| Material | High-strength alloy steel with hardened shift forks |
| Weight | Approx. 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 280 mm x 120 mm x 95 mm |
| Compatible Housing | 4644101222: TRANSMISSION HOUSING |
| Mounting Hardware | 0636021010: HEXAGON SCREW (4x required) |
| Output Interface | 4642303093: OUTPUT FLANGE |
Compatibility
This shift system is primarily engineered for the ZF WG 180 Series transmission, commonly found in medium-duty trucks, buses, and construction equipment. It is also compatible with the WG 200 Series, as the shift mechanism shares identical mounting points and internal geometry. For WG 180 variants with a 4644101222: TRANSMISSION HOUSING, this part ensures precise alignment. Always verify the serial number on your existing shift system before ordering, as later WG 200 models may require a different actuator configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Engages/disengages the transmission from the driveline |
| 4642303093 | OUTPUT FLANGE | Connects transmission output to the driveshaft |
| 0636021010 | HEXAGON SCREW | Secures shift system to the housing |
| 4644101222 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant for WG180 |
| 0730365067 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for shift system mounting |
| 4644301298 | COVER PLATE | Protects shift mechanism from debris |
| 0634306525 | O-RING | Seals shift system to prevent oil leaks |
| 0636305026 | SCREW PLUG | Closes hydraulic test ports on the housing |
ZF 4644.106.210 SHIFT SYSTEM – Shift System RFQ Support
PartsZF supports ZF 4644.106.210 SHIFT SYSTEM RFQs by checking the part number, related documentation, and buyer-supplied transmission context before quotation.
Part-Number Summary
Use ZF number 4644.106.210 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 | 4644.106.210 |
|---|---|
| Normalized SKU | 4644106210 |
| 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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