Overview
The ZF 4661.351.004 OUTER CLUTCH DISK is a critical friction component engineered for the WG 90 and WG 94 series transmissions. This OEM genuine part resides within the clutch pack assembly, where it transfers torque between rotating elements during gear shifts. As a wear-prone consumable, the SKU 4661.351.004 ensures precise engagement and disengagement of clutch packs, directly influencing shift quality and transmission longevity. It is designed to withstand high thermal loads and repetitive stress in heavy-duty industrial applications.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn friction material causes hesitation or jarring shifts, especially when moving from neutral to drive.
- Transmission slipping under load: The clutch disk fails to hold torque, leading to RPM flare without proportional vehicle movement during acceleration.
- Burnt transmission fluid odor: Overheated friction material contaminates the oil, producing a distinct acrid smell and darkening the fluid.
- Erratic shifting patterns: The transmission may hunt for gears or fail to upshift/downshift properly due to inconsistent clutch pack pressure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4661.351.004 |
| Outer Diameter | ~180 mm (estimated) |
| Inner Diameter | ~120 mm (estimated) |
| Thickness | ~3.5 mm (new) |
| Material | Sintered bronze friction lining on steel core |
| Weight | ~0.45 kg |
| OEM Reference | ZF 4661.351.004 |
| Application | WG 90, WG 94, WG 200, WG 92, WG 98 |
Compatibility
This outer clutch disk is designed for ZF WG-series transmissions, specifically the WG 90, WG 94, WG 92, WG 98, and WG 200 series. It is also compatible with the WG 180 and WG 190 variants where clutch pack dimensions match. Always verify spline count and stack height against your transmission’s service manual. For complete assembly, pair this disk with the 4660198001 PERIPHERALS kit and the 0501209818 RANGE SELECTOR to ensure proper shift logic. The 4660101011 TRANSMISSION HOUSING and 4660301018 HOUSING provide the structural envelope for this clutch pack.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Supporting clutch pack hardware |
| 0501209818 | RANGE SELECTOR | Controls gear range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural case |
| 4660301018 | HOUSING | Clutch pack enclosure |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for assembly |
| 0769123894 | TYPE PLATE | Identification tag for transmission |
| 4660221012 | SUCTION TUBE | Oil pickup for lubrication |
| 0634100317 | O-RING | Seals fluid passages |
| 0636103273 | CAP SCREW | Fastener for housing |
| 0750100022 | SCREW PLUG | Drain/fill port seal |
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