Overview
The ZF 4644.164.017 SHIFT SYSTEM is a critical OEM genuine control assembly designed specifically for the WG 180 series transmissions. This precision-engineered component governs the hydraulic and mechanical actuation required for gear selection, ensuring smooth engagement and disengagement of clutch packs within the transmission housing. Positioned directly on the valve body interface, the shift system translates driver commands into precise hydraulic pressure routing. The SKU 4644.164.017 is the definitive OEM reference for this part, guaranteeing exact fitment and factory-specified performance for heavy-duty commercial vehicles.
Symptoms of Failure
- Erratic or delayed gear engagement: When the shift system wears, operators often experience a noticeable lag between moving the selector and the transmission responding, particularly when shifting from neutral to drive.
- Intermittent gear slipping under load: A failing shift system can cause hydraulic pressure loss, leading to clutch pack slippage during acceleration or hill climbs, which generates excessive heat and wear.
- Transmission fluid leaks near the shift tower: Degraded seals within the 4644.164.017 assembly allow ATF to weep externally, leaving visible drips on the bell housing or under the chassis.
- Harsh or clunking shifts: Worn internal detents or springs in the shift system produce abrupt, jarring gear changes that can be felt throughout the vehicle driveline.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4644.164.017 |
| Product Type | Shift System Assembly |
| Material | High-grade aluminum alloy with hardened steel detent components |
| Overall Length | Approx. 210 mm |
| Weight | 1.85 kg (4.08 lbs) |
| Seal Type | Integrated PTFE O-rings |
| Operating Pressure Range | 8–18 bar |
| Compatible Fluid | ZF TE-ML 04D / 09K approved ATF |
Compatibility
This genuine ZF 4644.164.017 shift system is engineered primarily for the WG 180 transmission series, commonly found in municipal buses, refuse trucks, and medium-duty construction vehicles. It is also compatible with the WG 200 series and select variants of the Ecomat 4HP family where the shift interface and valve body mounting pattern match. For installations requiring the DISCONNECTION assembly, this shift system integrates directly with the OUTPUT FLANGE and the TRANSMISSION HOUSING. Always verify that the HEXAGON SCREW torque specifications match your application during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105475 | DISCONNECTION | Isolates shift system from driveline during service |
| 4642303097 | OUTPUT FLANGE | Transfers torque from transmission to driveshaft |
| 0636020211 | HEXAGON SCREW | Secures shift system to valve body |
| 4644101134 | TRANSMISSION HOUSING | Main structural casing for all internal components |
| 4644301349 | HOUSING | Encloses shift mechanism and valve body |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for shift system positioning |
| 0636305019 | SCREW PLUG | Seals hydraulic test ports on shift assembly |
| 4644301247 | THREADED BUSH | Reinforced insert for shift lever pivot point |
| 0634303485 | O-RING | Hydraulic seal between shift system and housing |
ZF 4644.164.017 SHIFT SYSTEM – Shift System RFQ Support
PartsZF supports ZF 4644.164.017 SHIFT SYSTEM RFQs by checking the part number, related documentation, and buyer-supplied transmission context before quotation.
Part-Number Summary
Use ZF number 4644.164.017 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 | 4644.164.017 |
|---|---|
| Normalized SKU | 4644164017 |
| 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
- ZF 2094.306.027 GEARSHIFT SHAFT
- ZF 4616.305.015 GEARSHIFT SHAFT
- ZF 4651.106.023 SHIFT SYSTEM
- ZF 2095.106.017 SHIFT SYSTEM
- ZF 4644.159.303 SHIFT SYSTEM
