Overview
The ZF 4616.323.017 OUTER CLUTCH DISK is a critical friction component engineered for the WG 65 series transmission. This genuine OEM part resides within the multi-plate clutch pack assembly, where it transmits torque between rotating shafts under hydraulic pressure. Specifically designed to handle high thermal loads, the 4616.323.017 outer disk provides the necessary friction surface for smooth gear engagement and disengagement. When installed alongside a TRANSMISSION HOUSING (4616101059), this disk ensures precise alignment and consistent clamping force during operation. The SKU 4616.323.017 is laser-etched for traceability and meets ZF’s stringent OEM tolerances.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn friction material causes the clutch pack to slip before fully locking, leading to a noticeable lag when shifting from neutral to drive or reverse.
- Erratic shift quality under load: As the outer clutch disk loses its friction coefficient, the transmission may exhibit jerky or unpredictable shifts, particularly when climbing grades or towing heavy loads.
- Burning smell or darkened transmission fluid: Excessive heat from slipping disks degrades the ATF, producing a distinct burnt odor and causing fluid to appear dark or metallic-flecked.
- Reduced torque capacity: A worn 4616.323.017 cannot hold peak torque, resulting in engine RPM flare-ups during acceleration without corresponding vehicle speed increase.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.323.017 |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 2.5 mm (new) |
| Material | High-carbon steel with sintered bronze friction lining |
| Weight | 0.45 kg |
| OEM Reference | ZF 4616.323.017 |
| Friction Coefficient | 0.12–0.14 (dry) |
Compatibility
This outer clutch disk is primarily designed for the ZF WG 65 series, but it also fits several other ZF powershift transmissions that share the same clutch pack architecture. Compatible models include the WG 65, WG 80, WG 100, WG 120, WG 150, WG 180, and WG 200 series. Always verify the clutch pack stack height when replacing this disk. For proper installation, secure the assembly using HEXAGON SCREW (0636011038), HEXAGON SCREW (0636011118), and HEXAGON SCREW (0636016015) to the transmission housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 0636011038 | HEXAGON SCREW | Fastens clutch pack to housing |
| 0636011118 | HEXAGON SCREW | Secures pressure plate assembly |
| 0636016015 | HEXAGON SCREW | Mounts outer clutch disk to hub |
| 0631306085 | CYLINDRICAL PIN | Aligns clutch pack components during assembly |
| 0634313118 | O-RING | Seals hydraulic passages in clutch piston |
| 0636304019 | SCREW PLUG | Closes oil galley ports in housing |
| 0634801152 | SEALING RING | Prevents fluid leakage between rotating shafts |
| 0732611049 | FILTER INSERT | Traps debris in transmission oil circuit |
| 0634303718 | O-RING | Seals clutch drum to piston housing |
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