Overview
The ZF 0501.322.676 CUP SPRING is a precision-engineered component designed for the WG90 and WG94 series transmissions. This OEM genuine part functions as a critical load-bearing element within the clutch pack assembly, providing consistent preload tension to ensure smooth gear engagement and torque transfer. Positioned between the piston and the pressure plate, the cup spring absorbs axial vibrations and maintains hydraulic pressure integrity. The SKU 0501.322.676 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit without modification. When installed alongside the 4661101001: TRANSMISSION HOUSING, this spring contributes to the overall durability of the transmission’s hydraulic circuit.
Symptoms of Failure
When the ZF 0501.322.676 cup spring fatigues or cracks, operators may notice these specific failure indicators:
- Delayed or harsh shifting: A worn spring loses its ability to maintain proper clutch pack clearance, causing abrupt gear changes or hesitation during acceleration.
- Oil leaks near the clutch housing: A collapsed cup spring can misalign seals, leading to ATF seepage around the 4661301007: HOUSING interface.
- Intermittent gear slipping under load: Reduced spring tension allows clutch plates to slip momentarily, particularly during uphill climbs or heavy towing.
- Metallic rattling from the bell housing: A fractured spring may produce a distinct clicking or grinding noise as loose fragments contact rotating components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.322.676 |
| Material | Spring steel (DIN 17221), phosphate-coated |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Thickness | 2.8 mm |
| Free Height | 14.2 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.322.676 |
| Torque Rating | 850 Nm (max) |
Compatibility
This cup spring is engineered for ZF’s WG series powershift transmissions, specifically the WG90 and WG94 models. It also fits the WG180, WG200, and WG210 variants when used in the forward clutch pack assembly. The spring interfaces directly with the 4661301093: TUBE and is secured by the 0631306174: CYLINDRICAL PIN during installation. Always verify your transmission’s serial number against ZF’s compatibility charts before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101001 | TRANSMISSION HOUSING | Encloses gear train and hydraulic valves |
| 4661301007 | HOUSING | Supports clutch pack and oil passages |
| 4661301093 | TUBE | Routes hydraulic fluid to clutch piston |
| 0631306174 | CYLINDRICAL PIN | Aligns spring and piston assembly |
| 0769123894 | TYPE PLATE | Identifies transmission model and specs |
| 0750100022 | SCREW PLUG | Seals oil drain or test ports |
| 0636302602 | SCREW PLUG | Secures housing access points |
| 0634100633 | O-RING | Prevents fluid leaks at joints |
| 4661301029 | NOZZLE | Directs oil spray for gear cooling |
| 4661301027 | NOZZLE | Provides lubrication to clutch plates |
