Overview
The ZF 4644.153.108 COUPLING is a critical driveline component engineered for the WG 180 and WG 200 transmission series. This OEM genuine part, identified by SKU 4644.153.108, serves as the primary torque-transfer interface between the engine output and the transmission input shaft. Positioned directly behind the bell housing, this coupling absorbs torsional vibrations and ensures smooth power delivery under heavy loads. For optimal assembly integrity, this coupling is often installed alongside the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING, which provide structural support and alignment within the WG 201 series architecture.
Symptoms of Failure
When the ZF 4644.153.108 coupling begins to degrade, operators may notice these specific failure indicators:
- Oil leaks near the bell housing – Worn coupling seals allow transmission fluid to escape, often leaving puddles under the driveline.
- Gear slipping under load – A fatigued coupling cannot maintain torque lockup, causing intermittent power loss during acceleration.
- Metallic rattling or clunking – Broken internal dampers produce audible noise, especially when shifting between forward and reverse.
- Vibration at highway speeds – Imbalanced coupling elements transmit harsh oscillations through the chassis, worsening with RPM.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (OEM) | 4644.153.108 |
| Material | High-strength alloy steel with nitrile rubber dampers |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 45 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF WG 180 / WG 200 |
| Torque Capacity | 1,200 Nm (estimated) |
Compatibility
This ZF 4644.153.108 COUPLING is designed for the following transmission models:
- ZF WG 180
- ZF WG 200
- ZF WG 201 Series (all variants)
- ZF Ecomat 4HP / 5HP (with adapter kits)
During replacement, technicians frequently pair this coupling with the 4644301189: THREADED BUSH to secure mounting points, and the 4475280043: SCREW PLUG to seal hydraulic passages. Always verify housing compatibility using the 4644101160: TRANSMISSION HOUSING as a reference.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses and aligns the coupling assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing for WG 200 series |
| 4644301189 | THREADED BUSH | Provides threaded anchor points for fasteners |
| 4475280043 | SCREW PLUG | Seals hydraulic ports against leakage |
| 0634306198 | O-RING | Creates fluid-tight seal between mating surfaces |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Secures housing and coupling to bell housing |
| 0631610020 | SET SCREW | Locks threaded bush in position |
| 0501218540 | BREATHER | Equalizes internal pressure and vents moisture |
