Overview
The ZF 0732.043.001 CUP SPRING is a precision-engineered component designed for the WG90, WG94, and WG98 transmission series. This OEM genuine part functions as a critical load-bearing element within the clutch pack assembly, providing the necessary preload tension to maintain consistent hydraulic pressure and smooth gear engagement. Positioned between the piston and the steel plates, the cup spring absorbs axial forces and compensates for thermal expansion during operation. The SKU 0732.043.001 is manufactured to ZF’s exacting tolerances, ensuring reliable performance in heavy-duty industrial applications. When installed alongside the 4660101015 TRANSMISSION HOUSING, this cup spring contributes to the structural integrity of the entire gearbox assembly.
Symptoms of Failure
When the ZF 0732.043.001 cup spring wears out, operators may notice specific performance issues that require immediate attention. Common failure symptoms include:
- Intermittent gear slipping under load – A worn cup spring cannot maintain proper clutch pack pressure, causing the transmission to lose torque during acceleration or uphill operation.
- Oil leaks near the clutch housing – Fatigue cracks in the spring can allow transmission fluid to bypass seals, leading to visible drips around the 4660301054 HOUSING II.
- Delayed or harsh shifting – Reduced spring force results in sluggish engagement or abrupt gear changes, often accompanied by metallic noises.
- Overheating of the transmission – Excessive friction from improper plate contact generates heat, potentially damaging adjacent components like the 0631306174 CYLINDRICAL PIN.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0732.043.001 |
| Material | High-carbon spring steel (DIN 17222) |
| Outer Diameter | 85.0 mm |
| Inner Diameter | 45.0 mm |
| Thickness | 3.5 mm |
| Free Height | 12.0 mm |
| Weight | 0.12 kg |
| Surface Finish | Phosphate-coated |
| OEM Reference | ZF 0732.043.001 |
Compatibility
This cup spring is engineered for ZF WG-series transmissions, specifically the WG90, WG94, and WG98 models. It also fits the WG180 and WG200 variants due to shared clutch pack architecture. The part is directly interchangeable with the original equipment installed in these gearboxes. For proper installation, ensure the 0769123894 TYPE PLATE is correctly aligned to verify model identification. Always replace the cup spring in pairs to maintain balanced pressure distribution across the clutch assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101015 | TRANSMISSION HOUSING | Encloses and supports internal gear train |
| 4660301054 | HOUSING II | Secondary housing for clutch pack assembly |
| 0631306174 | CYLINDRICAL PIN | Locates and aligns clutch components |
| 0769123894 | TYPE PLATE | Identifies transmission model and specs |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 4660221029 | SUCTION TUBE | Directs oil flow to the pump |
| 0634100317 | O-RING | Prevents fluid leaks at joint interfaces |
| 0636103273 | CAP SCREW | Secures housing covers |
| 0634306311 | O-RING | Seals hydraulic circuit connections |
| 4660321029 | FIXING PLATE | Retains spring assembly in position |
