Overview
The ZF 4644.153.110 COUPLING is a critical driveline component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part serves as the primary mechanical link between the engine output and the transmission input shaft, ensuring precise torque transfer and dampening torsional vibrations. Positioned directly within the bell housing assembly, the 4644.153.110 coupling works in concert with the TRANSMISSION HOUSING (4644101177) and the TRANSMISSION HOUSING (4644301229) to maintain structural alignment. This SKU is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Torque converter shudder or vibration at low speeds: A worn 4644.153.110 coupling loses its damping capacity, causing noticeable shuddering during acceleration from a standstill, especially in WG 200 series transmissions.
- Transmission oil leaks near the bell housing: When the coupling’s sealing surface degrades, transmission fluid can seep past the joint, often mistaken for a main seal failure. This is a common long-tail search query for “ZF WG200 oil leak bell housing.”
- Clunking noise during gear engagement: Excessive play in the coupling splines produces a metallic clunk when shifting from Park to Drive or Reverse, indicating imminent failure.
- Reduced fuel efficiency and sluggish response: A failing coupling creates parasitic drag and inefficient power transfer, leading to higher fuel consumption and delayed throttle response in industrial vehicles.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.153.110 |
| Material | High-strength alloy steel with rubber damping insert |
| Outer Diameter | 180 mm (estimated) |
| Inner Spline Diameter | 35 mm (estimated) |
| Overall Length | 95 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4644.153.110 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This ZF 4644.153.110 COUPLING is designed for the following transmission models: ZF WG 180 and ZF WG 200 series. It is also compatible with select variants of the ZF WG 150 and WG 160 series when used with the appropriate TYPE PLATE (0730365067) for identification. For proper installation, ensure the GROOVED STUD (0631311009) is torqued to factory specifications. This coupling is commonly found in municipal buses, fire trucks, and heavy construction equipment utilizing ZF’s WG series automatic transmissions.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101177 | TRANSMISSION HOUSING | Encloses and supports internal transmission components |
| 4644301229 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 series |
| 0730365067 | TYPE PLATE | Identification plate for transmission model verification |
| 0631311009 | GROOVED STUD | Fastener for coupling-to-housing attachment |
| 4644303060 | COVER PLATE | Seals the coupling access port |
| 4644303061 | COVER PLATE | Alternate cover plate for different housing configurations |
| 0634306525 | O-RING | Provides fluid seal between coupling and housing |
| 0636305026 | SCREW PLUG | Seals hydraulic test ports on the housing |
| 0501316470 | BREATHER | Equalizes internal transmission pressure |
| 4644301279 | SCREEN SHEET | Filters debris from transmission fluid flow |
