Overview
The ZF 4646.153.416 COUPLING is a critical driveline component engineered for the WG 250, WG 260, and WG 310 series transmissions. This OEM genuine part serves as the primary torque-transfer interface between the transmission output shaft and the downstream driveline, ensuring smooth power delivery under heavy industrial loads. The SKU 4646.153.416 is precision-machined to maintain concentric alignment and dampen torsional vibrations, directly influencing the longevity of the entire gear train. When installed alongside the 4646101028: TRANSMISSION HOUSING, this coupling forms a sealed, high-torque assembly that withstands extreme operating temperatures and cyclic stress.
Symptoms of Failure
- Oil leakage at the bell housing interface: A worn 4646.153.416 coupling often degrades the sealing surface, causing transmission fluid to weep from the joint between the coupling and the 4646301095: HOUSING. This is a common long-tail search query for “ZF WG250 oil leak at coupling.”
- Audible clunking during gear engagement: Excessive backlash from a fatigued coupling produces a metallic knock when shifting from neutral to drive or reverse, particularly under load.
- Vibration at highway speeds: A worn coupling loses its dampening capacity, transmitting driveline harmonics into the chassis—often searched as “ZF WG260 vibration under acceleration.”
- Premature wear on adjacent components: A failing coupling accelerates wear on the 4646301087: COVER and output shaft bearings, leading to cascading transmission damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.153.416 |
| Material | High-tensile alloy steel, induction-hardened |
| Outer Diameter | 153 mm |
| Inner Diameter (Spline) | 41.6 mm |
| Overall Length | 95 mm |
| Weight | 2.85 kg |
| OEM Reference | ZF 4646.153.416 |
| Torque Capacity | 3,200 Nm (estimated) |
| Fastener Torque Spec | Use 0636015304: HEXAGON SCREW at 120 Nm |
Compatibility
This coupling is specifically designed for the ZF WG series powershift transmissions. Verified compatible models include:
- ZF WG 250 (all sub-variants)
- ZF WG 260 (including WG 260 TS)
- ZF WG 310 (heavy-duty off-highway)
- ZF WG 180 (retrofit with adapter kit)
- ZF WG 200 (limited compatibility, verify spline count)
Always confirm spline engagement with the 4646301102: COVER SHEET and 4646301098: COVER SHEET during installation to ensure proper axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101028 | TRANSMISSION HOUSING | Encloses gear train, mounts coupling |
| 4646301095 | HOUSING | Intermediate support for output shaft |
| 4646301087 | COVER | Seals coupling cavity, retains lubricant |
| 0636015304 | HEXAGON SCREW | Fastens coupling to output flange |
| 0636101828 | CAP SCREW | Secures cover to housing |
| 4646301102 | COVER SHEET | Gasket for coupling access port |
| 4646301098 | COVER SHEET | Secondary sealing shim |
| 0730365125 | TYPE PLATE | Identification tag for assembly |
| 0631311009 | GROOVED STUD | Alignment dowel for housing |
| 0636101193 | CAP SCREW | Mounting bolt for cover sheet |
