Overview
The ZF 4644.159.260 SHIFT SYSTEM is a precision-engineered OEM genuine component designed for the WG 201 series transmission. This assembly governs gear engagement and disengagement within the planetary gear set, directly controlling hydraulic flow to the clutch packs. As the mechanical interface between the driver’s command and the transmission’s internal valves, it ensures smooth, reliable shifting under heavy-duty loads. The SKU 4644.159.260 replaces worn shift rails, detent springs, and selector forks to restore factory shift quality. It integrates with the TRANSMISSION HOUSING (4644101160) and the TRANSMISSION HOUSING (4644301323) to maintain structural alignment during operation.
Symptoms of Failure
- Hard or delayed gear engagement: Worn shift forks or detent mechanisms cause hesitation when moving from neutral to drive or reverse, often accompanied by a clunk sound.
- Intermittent gear slipping: A failing shift system allows hydraulic pressure to bleed, leading to loss of torque transfer under load, especially in higher gears.
- Oil leaks near the shift shaft: Degraded seals within the shift system allow transmission fluid to escape, leaving puddles under the vehicle and reducing lubrication.
- Erratic shift patterns: The transmission may skip gears or fail to hold a selected gear due to internal binding or misalignment of the shift rail.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4644.159.260 |
| OEM Reference | ZF 4644.159.260 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 1.85 kg (4.08 lbs) |
| Dimensions (L x W x H) | 210 mm x 85 mm x 65 mm |
| Compatible Housing | 4644101160, 4644301323 |
| Sealing Components | 0634306198 O-RING, 4475280043 SCREW PLUG |
| Fasteners | 0636100621 HEXAGON SCREW, 0631610020 SET SCREW |
Compatibility
This shift system is engineered for the ZF WG 201 series transmissions, which include models such as WG180, WG200, and WG210. It is also backward-compatible with earlier WG160 variants when used with the correct THREADED BUSH (4644301189) and COVER PLATE (4644301161). Always verify the shift rail length and detent spring tension against your transmission’s serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses gear sets and shift mechanism |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing for WG201 variants |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread for shift rail |
| 4475280043 | SCREW PLUG | Seals hydraulic passages in shift system |
| 0634306198 | O-RING | Prevents fluid leaks at shift shaft bore |
| 0730365067 | TYPE PLATE | Identifies transmission model and specs |
| 4644301161 | COVER PLATE | Protects shift mechanism from debris |
| 0636100621 | HEXAGON SCREW | Secures shift system to housing |
| 0631610020 | SET SCREW | Locks shift rail detent in position |
| 0501218540 | BREATHER | Vents pressure from shift system cavity |
ZF 4644.159.260 SHIFT SYSTEM – Shift System RFQ Support
PartsZF supports ZF 4644.159.260 SHIFT SYSTEM RFQs by checking the part number, related documentation, and buyer-supplied transmission context before quotation.
Part-Number Summary
Use ZF number 4644.159.260 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 | 4644.159.260 |
|---|---|
| Normalized SKU | 4644159260 |
| 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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