Overview
The ZF 4644.159.069 SHIFT SYSTEM is a critical OEM genuine component engineered specifically for the WG 150 Series transmission. This precision-machined assembly governs the selection and engagement of forward and reverse gears, translating driver input into hydraulic valve commands within the transmission control module. As the mechanical interface between the shift lever and the valve body, the 4644.159.069 ensures crisp, reliable gear changes under heavy-duty industrial loads. When paired with a robust TRANSMISSION HOUSING, this shift system maintains alignment and sealing integrity, preventing contamination from entering the hydraulic circuit. The SKU 4644.159.069 is a direct replacement part, manufactured to ZF’s original tolerances for seamless installation.
Symptoms of Failure
- Gear engagement hesitation or slipping: A worn shift system can cause delayed or incomplete gear engagement, particularly under load, leading to dangerous lurching or loss of power during operation.
- Hydraulic fluid leaks near the shift tower: Degraded seals or a cracked shift system housing allow transmission oil to escape, visible as drips or puddling around the shift linkage area.
- Stiff or imprecise shift lever movement: Internal wear or corrosion in the 4644.159.069 mechanism creates excessive friction, making gear selection difficult or requiring excessive force.
- Unintended gear disengagement: A failing shift system may fail to lock the selected gear, causing the transmission to pop out of gear during operation, especially on inclines.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4644.159.069 |
| OEM Reference | ZF WG 150 Series |
| Material | High-strength aluminum alloy with hardened steel shift forks |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 95 mm |
| Seal Type | Integrated PTFE lip seals |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This shift system is designed for the ZF WG 150 Series transmission family. It is also compatible with the WG 180 and WG 200 models when used with the appropriate TRANSMISSION HOUSING variant. The 4644.159.069 interfaces directly with the valve body and requires a correct TYPE PLATE for proper identification during rebuilds. For secure mounting, the assembly utilizes a GROOVED STUD to prevent loosening under vibration. Always verify your transmission serial number against ZF’s compatibility charts before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and protects internal transmission components |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for specific WG models |
| 0730365125 | TYPE PLATE | Identification plate for transmission model and specs |
| 0631311009 | GROOVED STUD | Secures shift system to housing with anti-rotation feature |
| 4642301168 | SCREEN SHEET | Filters hydraulic fluid entering the shift system |
| 4642301169 | SCREEN SHEET | Fine-mesh filter for high-flow applications |
| 0636100621 | HEXAGON SCREW | Fastener for shift system mounting bracket |
| 4642301186 | SCREEN SHEET | Replacement screen for shift system oil gallery |
| 4644106085 | SHIFT SYSTEM | Alternate shift system variant for WG 200 series |
| 4642306050 | COVER PLATE | Seals the shift system access port on the housing |
ZF 4644.159.069 SHIFT SYSTEM – Shift System RFQ Support
ZF 4644.159.069 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 4644.159.069 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 | 4644.159.069 |
|---|---|
| Normalized SKU | 4644159069 |
| 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: real photo. 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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