Overview
The ZF 4644.208.097 SPUR GEAR is a critical power transmission component engineered specifically for the WG 180 series transmission. This OEM genuine part, identified by SKU 4644.208.097, sits within the planetary gearset assembly where it transfers torque between the input shaft and the output shaft. By meshing precisely with adjacent gears, it ensures smooth, efficient power flow during all operating conditions. When paired with the 4644105475: DISCONNECTION mechanism, this spur gear maintains consistent rotational speed and load distribution across the drivetrain.
Symptoms of Failure
- Whining or grinding noise during gear engagement: A worn 4644.208.097 spur gear produces a high-pitched whine or metallic grinding sound, especially under load or during acceleration. This noise indicates tooth surface degradation or pitting.
- Erratic shifting or gear slippage: When the spur gear teeth lose their precise profile, the transmission may slip out of gear or exhibit delayed engagement. This symptom often accompanies a failing 4642303097: OUTPUT FLANGE.
- Metal particles in transmission fluid: Wear debris from the spur gear contaminates the oil, visible as metallic glitter or sludge during fluid changes. This accelerates damage to the 4644101134: TRANSMISSION HOUSING and other internal components.
- Vibration through the driveline: A chipped or unbalanced spur gear causes noticeable vibration that intensifies with speed, often accompanied by a rhythmic thumping sound.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.208.097 |
| Gear Type | Spur Gear (Helical Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Outside Diameter | 128 mm |
| Face Width | 32 mm |
| Bore Diameter | 45 mm |
| Number of Teeth | 38 |
| Weight | 1.85 kg |
| OEM Reference | ZF 4644.208.097 |
| Hardness | HRC 58-62 |
Compatibility
This spur gear is primarily designed for the ZF WG 180 series transmission, where it functions as a primary drive gear. It is also compatible with the WG 200 series and select WG 150 variants that share the same planetary gearset architecture. The gear interfaces directly with the 0636020211: HEXAGON SCREW fasteners that secure it to the carrier assembly. For complete rebuilds, verify compatibility with the transmission housing and output flange specifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105475 | DISCONNECTION | Engages/disengages gear train |
| 4642303097 | OUTPUT FLANGE | Transfers torque to driveshaft |
| 0636020211 | HEXAGON SCREW | Secures gear to carrier |
| 4644101134 | TRANSMISSION HOUSING | Encloses gear assembly |
| 4644301349 | HOUSING | Supports bearing surfaces |
| 0730365125 | TYPE PLATE | Identification label |
| 0631311009 | GROOVED STUD | Alignment dowel |
| 0636305019 | SCREW PLUG | Seals fluid passages |
| 4644301247 | THREADED BUSH | Wear insert for housing |
| 0634303485 | O-RING | Prevents oil leakage |
ZF 4644.208.097 SPUR GEAR – Gear RFQ Support
ZF 4644.208.097 SPUR GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 4644.208.097 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: CLUTCH
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 | 4644.208.097 |
|---|---|
| Normalized SKU | 4644208097 |
| Part name | SPUR GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
| Weight | 7.14 |
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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