Overview
The ZF 4644.153.405 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the input shaft and the transmission housing. Designed to withstand high cyclic loads and thermal stress, the 4644.153.405 clutch ensures precise gear engagement and smooth power delivery in heavy-duty industrial applications. As a direct replacement for the WG 181 Series, this SKU maintains factory tolerances and material specifications, making it essential for drivetrain reliability.
Symptoms of Failure
- Delayed or harsh gear engagement – When the clutch disc wears or glazes, operators often report a noticeable lag or abrupt shift when selecting forward or reverse gears, particularly under load.
- Transmission slipping under load – A failing 4644.153.405 clutch may cause the transmission to momentarily lose torque during acceleration or uphill operation, leading to RPM flare without corresponding vehicle speed increase.
- Contaminated transmission fluid with metallic debris – Friction material shedding from the clutch plates produces fine metallic particles in the oil, visible during routine fluid checks or filter inspections.
- Unusual clutch chatter or vibration – Worn splines or warped clutch plates generate audible shuddering or low-frequency vibration during engagement, especially at low speeds.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4644.153.405 |
| Product Type | Clutch Assembly |
| Material | High-carbon steel hub with sintered bronze friction lining |
| Outer Diameter | 153 mm |
| Inner Diameter | 105 mm |
| Thickness (assembled) | 24.5 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4644.153.405 |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This clutch is designed for the ZF WG 180, WG 200, and WG 181 Series transmissions commonly found in industrial forklifts, telehandlers, and construction machinery. It is a direct fit for models including WG180, WG200, and all WG 181 variants. The 4644.153.405 clutch interfaces directly with the 4644101217 TRANSMISSION HOUSING and the 4644301383 TRANSMISSION HOUSING, while the 4644301189 THREADED BUSH and 4475280043 SCREW PLUG are used in the same assembly for secure mounting and sealing. Always verify transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101217 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4644301383 | TRANSMISSION HOUSING | Secondary housing section for torque converter area |
| 4644301189 | THREADED BUSH | Guides and aligns clutch actuation components |
| 4475280043 | SCREW PLUG | Seals hydraulic passages in the clutch circuit |
| 0634306198 | O-RING | Prevents fluid leaks between clutch and housing |
| 0634801098 | SEALING RING | Static seal for clutch piston bore |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Locates and secures clutch pack alignment |
| 4644301161 | COVER PLATE | Protects clutch assembly from debris ingress |
| 0636100621 | HEXAGON SCREW | Fastens cover plate and housing sections |
