Overview
The ZF 4644.106.013 SHIFT SYSTEM is a precision-engineered OEM genuine component designed exclusively for the WG 180 Series transmission. This critical assembly governs gear engagement and disengagement, directly controlling the hydraulic flow that actuates clutch packs within the transmission housing. Positioned as the central command interface between the driver’s input and the gearbox’s internal mechanics, the SKU 4644.106.013 ensures smooth, reliable shifting under heavy-duty industrial loads. When paired with a properly sealed TRANSMISSION HOUSING, this shift system maintains consistent pressure regulation, preventing premature wear across the entire drivetrain.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn shift system components cause sluggish shifting or abrupt clunks, especially when moving from neutral to drive.
- Intermittent gear slipping under load: Internal leakage within the shift system leads to pressure loss, allowing the transmission to slip during acceleration or hill climbs.
- Hydraulic fluid contamination: Degraded seals in the shift system allow metal particles or debris to circulate, often visible as dark, gritty oil on the dipstick.
- Unexplained transmission overheating: A failing shift system forces the transmission to work harder, generating excess heat that can damage the DISCONNECTION assembly and surrounding components.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4644.106.013 |
| Material | High-strength aluminum alloy with hardened steel pistons |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 95 mm |
| Operating Pressure Range | 8–15 bar (116–218 psi) |
| Seal Type | Nitrile rubber (NBR) O-rings |
| OEM Reference | ZF 4644.106.013 |
Compatibility
This shift system is engineered for the ZF WG 180 Series, but it also fits select variants of the WG 200 and WG 150 transmissions due to shared hydraulic architecture. It is directly compatible with models using the OUTPUT FLANGE and the HEXAGON SCREW fastening pattern. Always verify your transmission’s serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105475 | DISCONNECTION | Isolates transmission from engine during neutral |
| 4642303097 | OUTPUT FLANGE | Connects transmission to driveshaft |
| 0636020211 | HEXAGON SCREW | Secures shift system to housing |
| 4644101134 | TRANSMISSION HOUSING | Encloses all internal gearbox components |
| 4644301349 | HOUSING | Secondary casing for shift valve assembly |
| 0730365125 | TYPE PLATE | Identification label with transmission specs |
| 0631311009 | GROOVED STUD | Alignment pin for shift system installation |
| 0636305019 | SCREW PLUG | Seals hydraulic test ports |
| 4644301247 | THREADED BUSH | Reinforces mounting points |
| 0634303485 | O-RING | Prevents fluid leaks at shift system joints |
ZF 4644.106.013 SHIFT SYSTEM – Shift System RFQ Support
ZF 4644.106.013 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 4644.106.013 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
This shift system supports shift-control sourcing and repair preparation for ZF transmission applications. Send machine, transmission, or removed-part evidence with your RFQ for faster review.
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 | 4644.106.013 |
|---|---|
| Normalized SKU | 4644106013 |
| 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.
Related Parts
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- ZF 4644.159.303 SHIFT SYSTEM
