Overview
The ZF 4644.106.253 SHIFT SYSTEM is a precision-engineered OEM genuine component designed exclusively for the WG 200 Series transmission family. This critical assembly governs gear selection and clutch modulation within the transmission housing, ensuring smooth power delivery under heavy-duty industrial loads. The SKU 4644.106.253 interfaces directly with the shift fork and selector rails, translating driver input into precise hydraulic valve actuation. When paired with a robust TRANSMISSION HOUSING (4644101164) or the alternative TRANSMISSION HOUSING (4644301371), this shift system maintains optimal alignment and sealing integrity. The assembly also relies on the correct TYPE PLATE (0730365067) for identification and the GROOVED STUD (0631311009) for secure mounting.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: Worn shift system components cause hesitation when moving between forward and reverse, often accompanied by grinding noises during low-speed maneuvers.
- Hydraulic fluid seepage at shift tower: Degraded seals within the 4644.106.253 assembly lead to visible oil leaks around the shift shaft, resulting in low fluid levels and eventual transmission overheating.
- Inability to hold gear under load: A failing shift system allows the transmission to slip out of gear when climbing grades or towing heavy equipment, creating dangerous operational conditions.
- Increased shift effort or sticking: Mechanical binding in the shift mechanism produces a stiff, notchy feel when moving the gear lever, often requiring excessive force to complete shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.106.253 |
| OEM Reference | ZF 4644.106.253 |
| Material | Hardened steel alloy with corrosion-resistant coating |
| Weight | 2.4 kg (5.3 lbs) |
| Overall Length | 215 mm |
| Mounting Hole Diameter | 12 mm |
| Operating Temperature Range | -40°C to +120°C |
| Seal Type | Integrated PTFE lip seals |
Compatibility
This shift system is engineered for the ZF WG 200 Series, including models WG180, WG200, and WG210. It is also backward-compatible with select WG150 variants that share the same shift tower architecture. The 4644.106.253 replaces earlier revision 4644.106.252 and supersedes all previous shift system iterations for these transmissions. For proper installation, ensure the transmission housing is free of cracks and that the O-RING (0634306525) is replaced simultaneously to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101164 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301371 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate with serial number |
| 0631311009 | GROOVED STUD | Fastener for shift system mounting |
| 4644303060 | COVER PLATE | Seals shift system access port |
| 4644201011 | COVER PLATE | Alternate cover for early WG200 models |
| 4644201010 | COVER PLATE | Lower-profile cover plate variant |
| 4644301372 | COVER PLATE | Reinforced cover for high-torque applications |
| 0636610028 | STUD | Threaded rod for housing assembly |
| 0634306525 | O-RING | Hydraulic seal for shift shaft |
ZF 4644.106.253 SHIFT SYSTEM – Shift System RFQ Support
PartsZF supports ZF 4644.106.253 SHIFT SYSTEM RFQs by checking the part number, related documentation, and buyer-supplied transmission context before quotation.
Part-Number Summary
Use ZF number 4644.106.253 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 | 4644.106.253 |
|---|---|
| Normalized SKU | 4644106253 |
| 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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